CN111430927A - Incident wave regulation and control method and device based on metamaterial waveguide array - Google Patents
Incident wave regulation and control method and device based on metamaterial waveguide array Download PDFInfo
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Abstract
The application belongs to the technical field of metamaterials, and particularly relates to an incident wave regulation and control method and device based on a metamaterial waveguide array, wherein the incident wave regulation and control method comprises the following steps: acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves; constructing a waveguide unit according to an incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition; constructing an array according to the waveguide unit, the incident wavelength and the Fabry-Perot resonance condition, wherein the array comprises a plurality of waveguide channels, and each waveguide channel comprises a plurality of waveguide units; respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to regulation and control requirements; and regulating and controlling incident waves by using the rotated waveguide array. The waveguide array of the embodiment has a simple, flexible and adjustable structure, and can simply and quickly regulate and control incident waves.
Description
Technical Field
The application belongs to the technical field of metamaterials, and particularly relates to an incident wave regulation and control method and device based on a metamaterial waveguide array.
Background
The metamaterial is an artificial material with sub-wavelength size and has certain property parameters which are not possessed by natural materials. In recent years, electromagnetic waves and acoustic metamaterials are greatly developed, and especially, ultra-large, zero, anisotropic or negative refractive index property parameters are introduced into a structured two-dimensional metamaterial on an equivalent medium level, so that the structured two-dimensional metamaterial is currently applied to the manipulation of sound waves to generate new physical phenomena and the research and development of various novel devices, for example, incident waves can be regulated and controlled through a metamaterial waveguide array.
In order to change the functional effect of the waveguide array, the equivalent refractive index of the metamaterial waveguide unit in the waveguide array can be changed. In the prior art, the equivalent refractive index of the waveguide unit can be changed by changing the structural parameters of the metamaterial unit, for example, changing the length, area or volume of the metamaterial unit, or the waveguide unit with adjustable equivalent refractive index can be manufactured by additionally adding dimensions, using piezoelectric materials or adding external circuits. However, the above method for changing the functional effect of the waveguide array is cumbersome and complicated in steps, and cannot simply and quickly regulate the incident wave.
Disclosure of Invention
The embodiment of the application provides an incident wave regulation and control method based on a metamaterial waveguide array, and incident wave regulation and control can be simply and quickly carried out.
In a first aspect, an embodiment of the present application provides a metamaterial waveguide array, including:
acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves;
constructing a waveguide unit according to the incident wavelength, wherein the width of the waveguide unit is smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;
constructing a waveguide array according to the waveguide units, the incident wavelength and a Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units;
respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;
and regulating and controlling the incident wave by using the rotated waveguide array.
In a second aspect, an embodiment of the present application provides an incident wave modulation device based on a metamaterial waveguide array, including:
the incident wavelength acquisition module is used for acquiring the regulation and control requirements of incident waves and the incident wavelengths of the incident waves;
the waveguide unit construction module is used for constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;
a waveguide array constructing module, configured to construct a waveguide array according to the waveguide units, the incident wavelength, and a fabry-perot resonance condition, where the waveguide array includes a plurality of waveguide channels, and the waveguide channels include a plurality of waveguide units;
the elliptical structure rotating module is used for respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;
and the incident wave regulation and control module is used for regulating and controlling the incident wave by using the rotated waveguide array.
Compared with the prior art, the embodiment of the application has the advantages that: the waveguide array constructed according to the Fabry-Perot resonance condition has high energy transmission rate, and can effectively reduce energy consumption during incident wave transmission; in addition, the equivalent refractive index of the waveguide channel can be rapidly changed by rotating the elliptical structure in the waveguide channel, and the phase amplitude characteristic of the waveguide channel is controlled to obtain a waveguide array meeting the regulation and control requirement, so that the incident wave can be simply and rapidly regulated and controlled.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of an incident wave modulation method based on a metamaterial waveguide array according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a waveguide unit provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a waveguide channel according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a waveguide array provided in an embodiment of the present application;
FIG. 5 is a graph of the transmission spectrum and phase characteristics of a waveguide channel varying with the rotation angle θ according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating the results of super-resolution imaging provided by embodiments of the present application;
FIG. 7 is a graph illustrating the results of focusing effects provided by embodiments of the present application;
FIG. 8 is a schematic structural diagram of a rotated waveguide array according to an embodiment of the present application;
FIG. 9 is a schematic structural diagram of another rotated waveguide array provided in the embodiments of the present application;
FIG. 10 is a schematic structural diagram of an incident wave modulation device based on a metamaterial waveguide array according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of an incident wave regulation terminal device provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Example one
As shown in fig. 1, this embodiment provides an incident wave modulation method based on a metamaterial waveguide array, which can modulate an incident wave, and the incident wave modulation method may include:
s101, acquiring regulation and control requirements for incident waves and incident wavelengths of the incident waves.
It is understood that the incident wave may be an incident wave satisfying the noelman boundary condition, for example, an acoustic wave, a two-dimensional electromagnetic wave, or the like.
It is understood that the type of the incident wave may be a gaussian beam, a plane wave, a point source wave, or the like, and the application does not limit the type of the incident wave.
It is understood that the modulation requirement may be a requirement for modulating incident light, for example, a requirement for wavefront conversion, a requirement for focusing wave front, a requirement for super-resolution imaging.
S102, constructing a waveguide unit according to the incident wavelength, wherein the width of the waveguide unit is smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noiman boundary condition.
As shown in fig. 2, the waveguide unit 21 may include two waveguide walls arranged in parallel and a rotatable elliptical structure 22, the elliptical structure 22 being arranged between the two waveguide walls. The elliptical structure 22 can be rotated within the waveguide unit 21 under the influence of an external force.
It is understood that the size of the waveguide unit 21 is a sub-wavelength size, that is, the length and width of the waveguide unit 21 are sub-wavelength, that is, the length and width of the waveguide unit 21 are smaller than the incident wavelength.
It is understood that the waveguide unit 21 and the elliptical structure 22 are made of materials satisfying the niemann boundary condition, and the specific materials used are not limited in this application.
In one embodiment, the elliptical structure 22 is rotatable about the center of the elliptical structure 22, and the center of the elliptical structure 22 coincides with the center of the waveguide unit 21. That is, the elliptical structure 22 may rotate about the center of the waveguide unit 21.
In one embodiment, the waveguide unit 21 has equal length and width, and the waveguide unit 21 has length and width smaller than the incident wavelength of 1/5, for example, when the incident wavelength is 6cm, the waveguide unit 21 has length and width of 1 cm. Here, the waveguide array composed of waveguide units with the length and width of the incident wavelength less than or equal to 1/5 can be equivalent to a uniform medium, so that the waveguide array is more beneficial to the regulation of the incident wave.
In one embodiment, the ratio of the length of the major axis to the length of the minor axis of the elliptical structure 22 can be any value, and in this embodiment, the ratio of the length of the major axis to the length of the minor axis of the elliptical structure 22 is 1: 0.25 is an example.
S103, constructing a waveguide array according to the waveguide units, the incident wavelength and the Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units.
As shown in fig. 3, each waveguide channel 3 may be composed of an arrangement of a plurality of waveguide units 21. For example, one channel 3 may be composed of an arrangement of 8 waveguide units 21.
In one embodiment, as shown in FIG. 4, the width of the waveguide array 4 may be greater than the incident wavelength. For example, when the waveguide unit 21 has an incident wavelength smaller than 1/5, and when the waveguide array 4 includes 6 or more than 6 waveguide channels 3, the width of the waveguide array 4 may be larger than the incident wavelength. In this embodiment, the specific width of the waveguide array 4 may be determined according to specific regulation requirements. The length direction of the waveguide array 4 is a direction in which any one of the waveguide channels 3 extends, and the width direction and the length direction of the waveguide array 4 are perpendicular to each other.
It can be understood that, in the waveguide array 4 constructed according to the waveguide unit 21, the incident wavelength and the fabry-perot resonance condition, each waveguide channel 3 satisfies the fabry-perot resonance condition, that is, each waveguide channel 3 can cause the fabry-perot resonance of the incident wave.
Specifically, the fabry-perot resonance condition is:
n*k0*l＝m*π
wherein n is the equivalent refractive index of any one of the waveguide channels 3, k0Is the free wave vector associated with the incident wavelength, l is the length of the waveguide channel 3, and m is the resonance order.
Specifically, the equivalent refractive index n may be obtained according to the waveguide channel, wherein the equivalent refractive index n may be a range of values since the equivalent refractive index of the waveguide channel may vary with the rotation of the elliptical structure within the waveguide channel. In addition, since the free wave vector is associated with the incident wavelength, the present embodiment can calculate the free wave vector from the incident wavelength, wherein the free wave vector k 02 pi/λ, λ is the incident wavelength. Here, after obtaining the equivalent refractive index and the free wave vector, the length range corresponding to the waveguide channel 3 satisfying the fabry-perot resonance condition may be calculated according to the fabry-perot resonance condition, and the number range of the waveguide units 21 that may be included in each waveguide channel 3 may be determined according to the length range corresponding to the waveguide channel 3 and the length of the waveguide unit.
As shown in fig. 3, after determining the number range of the waveguide units 21 included in the waveguide 3, a target number may be selected from the number range, and the waveguide units 21 of the target number may be arranged in a row to form the waveguide 3 that may be in a fabry-perot resonance state under the incident wave. The waveguide channels 3 may then be arranged in a row to construct a waveguide array 4 as shown in fig. 4, that is, each waveguide channel 3 in the waveguide array 4 constructed according to the waveguide unit 21, the incident wavelength, and the fabry-perot resonance condition may satisfy the fabry-perot resonance condition.
For example, in a scenario where the incident wavelength is 6 units and the length and width of the waveguide channel 3 are both 1 unit, when it is determined that each waveguide channel 3 includes 6 waveguide units 21, the waveguide channel 3 may satisfy the fabry-perot resonance condition, where the units may be any units such as micrometers, nanometers, or centimeters, and the units of the incident wavelength are the same as the units of the length and width of the waveguide channel 3.
For example, in a scene where the incident wavelength of the incident wave is in a range from 19cm to 100cm and the length and the width of each waveguide channel 3 are both 1cm, when it is determined that 20 waveguide units 21 are included in each waveguide channel 3, the waveguide channel 3 may satisfy the fabry-perot resonance condition.
And S104, respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements.
It will be appreciated that all of the elliptical formations 22 in the waveguide channel 3 can be rotated by an external force. Illustratively, some waveguide units 21 in the waveguide channel 3 may be rotated respectively according to the regulation requirement, or all waveguide units 21 in the waveguide channel 3 may be rotated.
In an embodiment, before the step S104 of separately rotating the elliptical structures in the waveguide channels of the waveguide array according to the regulation requirement, the method may further include:
and rotating all elliptical structures in a fourth waveguide channel under the incident wave, and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels.
It will be appreciated that the fourth waveguide channel, i.e. one of the waveguide channels 3 in the waveguide array 4, can be measured separately to obtain the transmittance and phase of each waveguide channel 3 conveniently and quickly. Specifically, it is possible to obtain a transmission spectrum and a phase characteristic map as a function of the rotation angle under the incident wave by rotating all the elliptical structures 22 in the fourth waveguide.
It should be noted that the rotation angle may be an angle between the corresponding direction of the elliptical structure 22 and the reference direction. For example, as shown in fig. 2, the direction corresponding to the elliptical structure 22 may be a direction of a long axis of the elliptical structure 22, the reference direction may be a length direction of the waveguide unit 21, and an angle between the direction of the long axis of the elliptical structure 22 and a width direction of the waveguide unit 21 is a rotation angle θ.
In this embodiment, as shown in fig. 5, the x-axis is the change of the rotation angle, the left y-axis is the transmittance, the right y-axis is the normalized phase, and the fourth waveguide channel can be rotated from 0 degree to 90 degrees under the incident wave, i.e. the angle change in the transmission spectrum and the phase characteristic diagram is from 0 to pi/2.
Here, a transmission peak angle when a fabry-perot resonant transmission peak occurs in the fourth waveguide may be determined according to the transmission spectrum and the phase characteristic diagram, and the first angle and the second angle may be determined according to the transmission peak angle, where a phase difference between the fabry-perot resonant transmission peak corresponding to the first angle and the fabry-perot resonant transmission peak corresponding to the second angle is pi.
It can be understood that, as shown in fig. 5, a plurality of fabry-perot resonant transmission peaks may appear on the transmission spectrum and the phase characteristic diagram, the transmittance corresponding to the resonant transmission peaks is close to 1, each fabry-perot resonant transmission peak corresponds to a rotation angle, and the rotation angle is the transmission peak angle at which the fabry-perot resonant transmission peak appears in the fourth waveguide.
It will be appreciated that the fourth waveguide satisfies the fabry-perot resonance condition and that the transmission rate of the incident wave by the fourth waveguide may be 100% when all of the elliptical structures 22 in the fourth waveguide are rotated to the transmission peak angle.
It can be understood that when the fourth waveguide channel satisfies the fabry-perot resonance condition, it has an advantage of phase locking, i.e., a phase difference between phases corresponding to two adjacent transmission peak angles is pi. In this embodiment, two adjacent transmission peak angles may be selected and respectively determined as the first angle and the second angle.
In an embodiment, when the regulation requirement is a requirement for performing super-resolution imaging, the step S104 of respectively rotating the elliptical structures in the waveguide channels of the waveguide array according to the regulation requirement may include:
step a, obtaining a transmission peak angle enabling the waveguide array to resonate under the incident wave;
and b, rotating the elliptical structure in each waveguide channel in the waveguide array to the transmission peak angle.
It will be appreciated that when all the elliptical structures 22 in the waveguide array 4 are rotated to a certain transmission peak angle, the incident wave can induce resonance throughout the waveguide array 4. The transmission peak angle of the waveguide array resonance can be obtained from the transmission spectrum and the phase characteristic diagram, and can also be obtained in any other mode, for example, an imaging diagram of incident waves can be observed in the process of rotating the elliptical structure, when the clear imaging diagram can be observed, the rotation of the rotating elliptical structure is stopped, and the corresponding angle when the rotation is stopped can be the transmission peak angle of the waveguide array resonance.
And S105, regulating and controlling the incident wave by using the rotated waveguide array.
In one embodiment, the incident wave may be incident along the length of the waveguide array 4.
Illustratively, when the regulation requirement is a requirement for performing super-resolution imaging, all the elliptical structures 22 in the waveguide array 4 are rotated to the same transmission peak angle after rotation.
It will be appreciated that when all the elliptical structures 22 in the waveguide array 4 are rotated at the same angle and rotated to the same transmission peak angle, i.e. each waveguide channel is in the same phase and each waveguide channel is in the same transmittance, the waveguide array 4 can be equivalent to a uniform medium, wherein the uniform medium can be used for imaging, and therefore, the waveguide array in which all the elliptical structures 22 are rotated at the same angle can be used for imaging.
Here, when an incident wave is incident on the rotated waveguide array 4, resonance of the entire waveguide array 4 can be induced, that is, when all the elliptical structures 22 in the waveguide array are rotated to the same transmission peak angle, the transmission rate of the waveguide array is nearly 100%, and energy dissipation is not substantially caused during transmission. The larger the wavelength range of the incident wave resonance caused by the waveguide array is, the wider the super-resolution imaging is, and therefore, the rotatable waveguide array can realize the broadband super-resolution imaging.
It can be understood that the waveguide array 4 is not limited to a two-dimensional planar structure, but may also be a three-dimensional stereo structure, and the corresponding waveguide array 4 may be constructed according to specific regulation requirements in this embodiment.
Illustratively, if the incident wave is an evanescent wave of a dual-source signal, when the evanescent wave is incident from the incident interface of the waveguide array, information carried by the evanescent wave can be transmitted to the exit interface through resonance of the waveguide array, so that an imaging diagram of super-resolution imaging as shown in fig. 6 can be obtained. According to the imaging graph of fig. 6, after the incidence of the evanescent wave of the dual-source signal is regulated and controlled by the waveguide array, the two sources can be clearly imaged, the gap between the two sources can be deep, and the two sources can be clearly distinguished on the imaging graph, so that broadband super-resolution imaging can be realized. The y-axis in fig. 6 is the normalized field intensity, the x-axis is the distance between the imaging position and the central axis of the waveguide array, and the central axis is parallel to the length direction.
In this embodiment, the equivalent refractive index of the waveguide unit can be changed along with the rotation of the elliptical structure, so that the medium with changeable refractive property is equivalent to the medium in the waveguide channel formed by arranging the waveguide units, and the waveguide array formed by arranging the waveguide channels can be equivalent to the medium layer with continuously adjustable refractive property. In addition, in this embodiment, the number of waveguide units in the waveguide channel may be determined according to the fabry-perot resonance condition and the incident wavelength, so that the waveguide channel including the waveguide units in the number may satisfy the fabry-perot resonance condition, and further, the fabry-perot resonance of the incident wave may be continuously caused. The waveguide array composed of the waveguide channels can at least find a rotation angle, such as a transmission peak angle, when all the elliptical structures in the waveguide array rotate to the transmission peak angle, Fabry-Perot resonance of incident waves can be caused, and at the moment, the energy transmission rate can basically reach 100% theoretically, and the energy consumption during incident wave conduction can be effectively reduced. Thus. The rotation angle of each elliptical structure can be determined only by acquiring the rotation angle when a Fabry-Perot resonant transmission peak appears, so that the incident wave can be simply and quickly regulated and controlled, and broadband super-resolution imaging can be realized.
Example two
As shown in fig. 1, this embodiment provides an incident wave modulation method based on a metamaterial waveguide array, which can modulate an incident wave, and the incident wave modulation method may include:
s101, acquiring regulation and control requirements for incident waves and incident wavelengths of the incident waves.
In this embodiment, the regulation requirement is a requirement for performing forward focusing.
S102, constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide unit and the elliptical structure are both made of materials meeting the Noelman boundary condition.
S103, constructing a waveguide array according to the waveguide units, the incident wavelength and the Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units.
The steps S101 to S103 may specifically refer to the descriptions of the steps S101 to S103 in the first embodiment, and are not repeated herein.
And S104, respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements.
Here, S104, respectively rotating the elliptical structure in each waveguide channel in the waveguide array according to the regulation requirement may include:
and c, acquiring a required focal length corresponding to the regulation and control requirement, and determining a focusing condition according to the required focal length.
In one embodiment, the desired focal length may be any distance, for example, infinity, 1.5 λ, 1 λ, 0.75 λ, where λ is the incident wavelength.
In one embodiment, the focus condition may be determined using the following formula:
wherein x isiFor the focusing condition, round { } is a rounding approximation function, λ is the incident wavelength, f is the desired focal length, and i is a positive integer. Step d, when the distance between the first waveguide channel and the central waveguide channel in the waveguide array meets the focusing condition, determining that the target angle of the first waveguide channel is a first angle, the first waveguide channel is any one of the waveguide channels, and rotating the elliptical structures in the first waveguide channel to the first angle.
It will be appreciated that the central waveguide channel 3 in the waveguide array 4 is the centrally located waveguide channel 3 in the waveguide array 4. For example, when the waveguide array 4 includes 5 waveguide channels 3 arranged in sequence, the 3 rd row of waveguide channels 3 is the central waveguide channel 3.
It can be understood that, since the target angles corresponding to the two first waveguide channels are the same when the distances between the two first waveguide channels and the central waveguide channel are the same, the target angles corresponding to the first waveguide channels symmetrical with respect to the central waveguide channel are the same. For the above reasons, in a specific application, the target angle corresponding to one half of the waveguide channels in the waveguide array may be determined and calculated according to the above focusing formula, and then the target angle corresponding to the other half of the waveguide channels may be determined according to the above symmetry.
It will be understood that the first angle refers to the angle between the direction of the major axis of the elliptical structure 22 and the reference direction.
It will be appreciated that the distance between the first waveguide channel and the central waveguide channel 3 in the waveguide array 4 may be the column number difference between the first waveguide channel and the central waveguide channel 3 in the waveguide array 4. For example, when the first waveguide channel is located in column 1 and the central waveguide channel 3 is located in column 3, the first waveguide channel may be located at a distance of 2 from the central waveguide channel 3.
Step e, when the distance between the first waveguide channel and the central waveguide channel does not meet the focusing condition, determining that the target angle of the first waveguide channel is a second angle, and rotating all the elliptical structures in the first waveguide channel to the second angle.
It is understood that the second angle also refers to the angle between the major axis of the elliptical structure 22 and the reference direction.
It will be appreciated that when the distance between the first waveguide channel and the central waveguide channel 3 in the waveguide array 4 is equal to any one of the focusing conditions xiThen the distance between the first waveguide channel and the central waveguide channel 3 can be considered to satisfy the focusing condition.
It will be appreciated that the central waveguide channels 3 in the waveguide array 4 do not generally meet the focusing condition and therefore the elliptical structures 22 of the central waveguide channels 3 may each be rotated to a second angle.
Illustratively, the waveguide array 4 may be encoded according to the focusing formula described above. Specifically, first, a first waveguide channel that needs to be rotated to a first angle may be taken as the encoding unit "1", and a second waveguide channel that needs to be rotated to the first angle may be taken as the encoding unit "0". Secondly, all waveguide channels in the waveguide array 4 may be set to the coding unit "0", i.e. all elliptical structures in the waveguide channels 3 are rotated to the second angle. Then, the position of the coding unit "1" can be determined according to the required focal length and focusing condition, and the coding unit "0" at the position is converted into the coding unit "1", that is, the elliptical structure at the position is rotated from the second angle to the first angle.
In one embodiment, when the desired focal length is infinity, the encoded sequence may be "000000000000000000000".
In one embodiment, when the required focal length is 1.5 λ, the coding sequence of the right half of the waveguide array can be calculated as "1100011000011000011000000" according to the above focusing condition, wherein the right half starts from the first waveguide channel to the right of the central waveguide channel.
In one embodiment, when the required focal length is 1 λ, the encoding sequence of the right half of the waveguide array can be calculated as "001100011000011000110000" according to the above focusing condition, wherein the right half starts from the first waveguide channel to the right of the central waveguide channel.
In one embodiment, when the required focal length is 0.75 λ, the encoding sequence of the right half of the waveguide array can be calculated as "0001100011000110000110000" according to the above focusing condition, wherein the right half starts from the first waveguide channel to the right of the central waveguide channel.
The waveguide array 4 in the present embodiment has an advantage that encoding is possible, and only the encoding unit "0" and the encoding unit "1" exist in the waveguide array 4. The waveguide array 4 for regulating and controlling the incident wave can be constructed only by arranging the coding units "0" and "1" according to a certain rule.
And S105, regulating and controlling the incident wave by using the rotated waveguide array.
For example, in a scenario where the incident wave is an approximately planar wave modulated by a gaussian signal, and the waveguide array 4 may include 60 waveguide channels 3, when the focal distance is required to be infinity, that is, when the incident wave does not need to be focused, it may be calculated that distances between all the first waveguide channels and the central waveguide channel do not satisfy the focusing condition, at this time, all the waveguide channels 3 may be rotated to the second angle, and the waveguide array 4 rotated to the second angle may be used to regulate and control the incident wave, so as to obtain a regulation result graph as shown in a and e in fig. 7. Wherein, a is an experimental result chart of the focusing effect, and e is a simulation result chart of the focusing effect.
For example, in a scenario where the incident wave is an approximately planar wave modulated by a gaussian signal, and the waveguide array 4 may include 60 waveguide channels 3, when the required focal length is 1.5 λ, 1 λ, or 0.75 λ, after rotating the first waveguide channel satisfying the focusing condition to a first angle and rotating the waveguide channel 3 not satisfying the focusing condition to a second angle, the rotated waveguide array 4 may be used to modulate the incident wave to obtain a modulation result map as shown in b, c, d, e, f, g, and h in fig. 7. In fig. 7, y may be a distance between the imaging position and the exit interface, and x may be a distance between the imaging position and a central axis of the waveguide array, the central axis being parallel to the length direction. The vertical axis direction in fig. 7 may be the normalized field strength. Wherein b is an experimental result diagram when the required focal length is 1.5 lambda, f is a simulation result diagram when the required focal length is 1.5 lambda, c is an experimental result diagram when the required focal length is 1 lambda, g is a simulation result diagram when the required focal length is 1 lambda, d is an experimental result diagram when the required focal length is 0.75 lambda, and h is a simulation result diagram when the required focal length is 0.75 lambda.
As can be seen from the experimental result diagram and the simulation effect diagram shown in fig. 7, the embodiment has a good focusing effect, and can reflect the effectiveness and flexibility of incident wave regulation.
In this embodiment, when each waveguide channel satisfies the fabry-perot resonance condition, a first angle and a second angle may be determined according to the transmission spectrum and the phase characteristic diagram, where the first angle and the second angle are rotation angles corresponding to the transmission peak of the fabry-perot resonance. The phase difference pi between the waveguide channel with all the elliptical structures rotated to the first angle and the phase difference pi between the waveguide channel with all the elliptical structures rotated to the second angle, and other materials do not have the characteristics, so that the required phase can be obtained only by debugging parameters, namely the waveguide channel meeting the Fabry-Perot resonance condition has the advantage of phase locking. When the wave front focusing regulation and control requirement is met, only the waveguide channels in the waveguide array need to be rotated to the first angle or the second angle, other complicated steps such as calculation, material parameter calibration or phase adjustment are not needed, the target angle corresponding to the required phase can be simply and quickly determined, the incident wave can be simply and quickly regulated, and the expected effect can be achieved.
EXAMPLE III
As shown in fig. 1, this embodiment provides an incident wave modulation method based on a metamaterial waveguide array, which can modulate an incident wave, and the incident wave modulation method may include:
s101, acquiring regulation and control requirements for incident waves and incident wavelengths of the incident waves.
In this embodiment, the regulation requirement may be a requirement for performing wavefront transformation.
S102, constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide unit and the elliptical structure are both made of materials meeting the Noelman boundary condition.
S103, constructing a waveguide array according to the waveguide units, the incident wavelength and the Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units.
The steps S101 to S103 may specifically refer to the descriptions of the steps S101 to S103 in the first embodiment, and are not repeated herein.
And S104, respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements.
In one embodiment, the step S104 of respectively rotating the elliptical structures in the waveguide channels of the waveguide array according to the regulation requirement may include:
and f, determining a transformation condition corresponding to the wavefront transformation according to the regulation requirement.
It will be appreciated that the requirement for wavefront conversion may be to convert an incident wave of one type to another, for example to convert an evanescent wave to a plane wave.
It will be appreciated that when the requirements for the wavefront transformation are different, the transformation conditions are also different. For example, an evanescent wave having a different phase transition period can be converted into a planar wave that propagates freely in space by rotating the elliptical structure 22 to change the phase periodically in the width direction of the waveguide array 4. For example, the elliptical structure 22 may be rotated to make the phase of the waveguide array 4 in the width direction periodically change, such that the phase of the waveguide array is 0 corresponding to the first waveguide channel, pi corresponding to the second waveguide channel, 0 corresponding to the third waveguide channel, pi corresponding to the fourth waveguide channel, 0 corresponding to the fifth waveguide channel, and pi corresponding to the sixth waveguide channel. Each phase period may be 2 times the width of the waveguide channel.
The phase period width of the evanescent wave having a different phase transition period may be different, and here, the phase period width may be determined according to the phase transition period, where the phase period width may be the width of any one phase period of the waveguide array 4. In the present embodiment, the phase cycle width required for wavefront conversion can be obtained by adjusting the number of the waveguide channels 3 in the second waveguide channel and the third waveguide channel.
In particular, the phase period width may be the same as the phase change period. For example, when the incident wave is an evanescent wave having a phase transition period of 4cm and the wavefront conversion is required to convert the evanescent wave having a phase transition period of 4cm into a planar wave, the phase period width may be 4cm, and if the waveguide channel has a width of 1cm, the second waveguide channel and the third waveguide channel each include 4 waveguide channels.
And g, determining a second waveguide channel with a target angle of a first angle in the waveguide array based on the conversion condition, and determining a third waveguide channel with a target angle of a second angle in the waveguide array.
It will be appreciated that the phase difference between the phase of the second waveguide channel and the phase of the third waveguide channel may be pi. Here, the target angle refers to an angle to which the elliptical structure in the second waveguide channel or the elliptical structure in the third waveguide channel needs to be rotated, for example, the target angle of the second waveguide channel is the first angle, that is, all the elliptical structures in the second waveguide channel need to be rotated to the first angle.
In one embodiment, the second waveguide channel and the third waveguide channel are alternately arranged in succession in the waveguide array 4, so that the phase of the waveguide array 4 can be periodically changed.
And h, rotating the elliptical structure in the second waveguide channel to the first angle, and rotating the elliptical structure in the third waveguide channel to the second angle.
It is understood that the second waveguide channel may include one waveguide channel 3 or a plurality of waveguide channels 3, the third waveguide channel may include one waveguide channel 3 or a plurality of waveguide channels, and the number of waveguide channels 3 included in the second waveguide channel and the third waveguide channel is the same. Here, the phase cycle width of the waveguide array 4 can be changed by changing the number of waveguide channels 3 included in the second waveguide channel and the third waveguide channel.
For example, as shown in fig. 8, if the change condition is that the phase cycle width of the waveguide array 4 is 2, in this case, the second waveguide channel may include one waveguide channel 3, the third waveguide channel may include one waveguide channel 3, and the second waveguide channel and the third waveguide channel 3 are alternately arranged, that is, the waveguide channels 3 from one end to the other end in the rotated waveguide array 4 may be "10101010", respectively, where the encoding unit "1" corresponds to the waveguide channel 3 rotated to the first angle, and the encoding unit "0" corresponds to the waveguide channel 3 rotated to the second angle.
For example, as shown in fig. 9, if the changing condition is that the phase period width of the waveguide array 4 is 4, in this case, the second waveguide channel may include two waveguide channels 3, and the third waveguide channel may include two waveguide channels 3, that is, the waveguide channels 3 from one end to the other end in the rotated waveguide array 4 may be "11001100", respectively.
And S105, regulating and controlling the incident wave by using the rotated waveguide array.
It is understood that, when an incident wave is incident on the rotated waveguide array 4, the incident wave can be converted into other waveforms by the waveguide array 4. For example, when the incident wave is an evanescent wave, if the incident wave is incident from one side of the waveguide array 4 parallel to the width direction, the incident wave passes through the waveguide array 4 rotated in the longitudinal direction, and then a plane wave that can freely propagate in space is acquired from the other side of the waveguide array 4 parallel to the width direction.
In this embodiment, each waveguide channel 3 satisfies the fabry-perot resonance condition, so the phase difference pi between the second waveguide channel with the target angle being the first angle and the third waveguide channel with the target angle being the second angle, and other materials do not have such characteristics, and the required phase can be obtained only by adjusting parameters, that is, the waveguide channel satisfying the fabry-perot resonance condition has the advantage of phase locking, and the rotation angle corresponding to each elliptical structure can be determined only by obtaining the rotation angle and the phase period width corresponding to the transmission peak of the fabry-perot resonance, and other complicated steps such as calculation, material parameter calibration, or phase adjustment are not needed, so that the corresponding target angle can be determined simply and quickly, and the expected effect of wavefront conversion can be achieved.
Example four
The present embodiment provides an incident wave modulation device based on a metamaterial waveguide array, which is used to implement the incident wave modulation method based on the metamaterial waveguide array described in the first, second, or third embodiment, as shown in fig. 10, where the incident wave modulation device 10 includes:
the incident wavelength obtaining module 11 is configured to obtain a regulation requirement for an incident wave and an incident wavelength of the incident wave.
The waveguide unit constructing module 12 is configured to construct a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide unit and the elliptical structure are both made of materials meeting the boundary conditions of niemann.
And a waveguide array constructing module 13, configured to construct a waveguide array according to the waveguide units, the incident wavelength, and a fabry-perot resonance condition, where the waveguide array includes a plurality of waveguide channels, and the waveguide channels include a plurality of waveguide units.
And the elliptical structure rotating module 14 is used for respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirement.
And the incident wave regulation and control module 15 is used for regulating and controlling the incident wave by using the waveguide array with the rotated elliptical structure.
In one embodiment, the elliptical structure is rotatable about a center of the elliptical structure, and the center of the elliptical structure coincides with a center of the waveguide unit.
In one embodiment, the waveguide unit is equal in length and width, both the length and width of the waveguide unit being less than 1/5 of the incident wavelength.
In one embodiment, the elliptical structure rotation module 14 may further include:
a transmission peak angle acquisition unit for acquiring a transmission peak angle at which the waveguide array resonates under the incident wave.
And the transmission peak angle rotating unit is used for rotating the elliptical structures in the waveguide channels in the waveguide array to the transmission peak angle resonance angle.
In one embodiment, the elliptical structure rotation module 14 may further include:
and the focusing condition acquisition unit is used for acquiring a required focal length corresponding to the regulation and control requirement and determining a focusing condition according to the required focal length.
A first angle rotation unit, configured to determine that a target angle of a first waveguide channel is a first angle when a distance between the first waveguide channel and a central waveguide channel in the waveguide array satisfies the focusing condition, where the first waveguide channel is any one of the waveguide channels, and rotate all elliptical structures in the first waveguide channel to the first angle.
And the second angle rotating unit is used for determining that the target angle of the first waveguide channel is a second angle and rotating the elliptical structures in the first waveguide channel to the second angle when the distance between the first waveguide channel and the central waveguide channel does not meet the focusing condition.
Specifically, the focusing condition acquisition unit may be further configured to determine the focusing condition using the following formula:
wherein round { } is a rounding approximation function, λ is the incident wavelength, and f is the desired focal length.
In one embodiment, the elliptical structure rotation module 14 may further include:
and the transformation condition determining unit is used for determining a transformation condition corresponding to the wavefront transformation according to the regulation requirement.
A second waveguide channel determination unit, configured to determine, based on the transformation condition, a second waveguide channel in the waveguide array whose target angle is a first angle, and determine a third waveguide channel in the waveguide array whose target angle is a second angle;
a second waveguide channel rotating unit to rotate the elliptical structure in the second waveguide channel to the first angle and to rotate the elliptical structure in the third waveguide channel to the second angle.
In one embodiment, the incident wave modulation device 10 may further include:
and the transmission spectrum acquisition module is used for rotating all elliptical structures in a fourth waveguide channel under the incident wave and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels.
A transmission peak angle determining module, configured to determine, according to the transmission spectrum and the phase characteristic diagram, a corresponding rotation angle when a fabry-perot resonant transmission peak occurs in the fourth waveguide;
and the first angle determining module is used for determining the first angle and the second angle according to the transmission peak angle, wherein the phase difference between the Fabry-Perot resonant transmission peak corresponding to the first angle and the Fabry-Perot resonant transmission peak corresponding to the second angle is pi.
It should be noted that, because the contents of information interaction, execution process, and the like between the above units are based on the same concept as that of the embodiment of the method of the present application, specific functions and technical effects thereof may be specifically referred to a part of the embodiment of the method, and details thereof are not described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
As shown in fig. 11, the present embodiment also provides a terminal device 17, including: at least one processor 173 (only one is shown in fig. 11), a memory 171, and a computer program 172 stored in the memory 171 and executable on the at least one processor 173, wherein the processor 173 implements the steps in any of the above-mentioned incident wave modulation method embodiments when executing the computer program 172.
The terminal device 17 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The incident wave conditioning terminal device may include, but is not limited to, a processor 173 and a memory 171. Those skilled in the art will appreciate that fig. 11 is merely an example of the terminal device 17, and does not constitute a limitation to the terminal device 17, and may include more or less components than those shown, or combine some components, or different components, such as an input/output device, a network access device, and the like.
The Processor 173 may be a Central Processing Unit (CPU), and the Processor 173 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 171 may in some embodiments be an internal storage unit of the terminal device 17, such as a hard disk or a memory of the terminal device 17, the memory 171 may in other embodiments also be an external storage device of the incident wave control terminal device 17, such as a plug-in hard disk provided on the incident wave control terminal device 17, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. further, the memory 171 may also include both an internal storage unit of the incident wave control terminal device 17 and an external storage device, the memory 171 is used to store an operating system, application programs, a Boot loader (Boot L loader), data and other programs, such as program codes of the computer program, etc. the memory 171 may also be used to temporarily store data that has been output or will be output.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a terminal device, enables the terminal device to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or apparatus capable of carrying computer program code to a terminal device, recording medium, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), electrical carrier wave signals, telecommunications signals, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An incident wave regulation and control method based on a metamaterial waveguide array is characterized by comprising the following steps:
acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves;
constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;
constructing a waveguide array according to the waveguide units, the incident wavelength and a Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units;
respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;
and regulating and controlling the incident wave by using the rotated waveguide array.
2. The incident wave modulation method of claim 1, wherein the elliptical structure is rotatable about a center of the elliptical structure, and the center of the elliptical structure coincides with a center of the waveguide unit.
3. The incident wave modulation method of claim 1, wherein the waveguide unit has a length and a width that are equal, and wherein the length and the width of the waveguide unit are less than or equal to 1/5 of the incident wavelength.
4. The incident wave modulation method according to claim 1, wherein when the modulation requirement is a requirement for performing super-resolution imaging, the rotating the elliptical structure in each waveguide channel of the waveguide array according to the modulation requirement comprises:
acquiring a transmission peak angle at which the waveguide array resonates under the incident wave;
rotating the elliptical structure in each of the waveguide channels in the waveguide array to the transmission peak angle.
5. The incident wave modulation method of claim 1, wherein when the modulation requirement is a requirement for forward focusing, the rotating the elliptical structures in each of the waveguide channels of the waveguide array according to the modulation requirement comprises:
acquiring a required focal length corresponding to the regulation and control requirement, and determining a focusing condition according to the required focal length;
when the distance between a first waveguide channel and a central waveguide channel in the waveguide array meets the focusing condition, determining that the target angle of the first waveguide channel is a first angle, and rotating all the elliptical structures in the first waveguide channel to the first angle, wherein the first waveguide channel is any one of the waveguide channels;
when the distance between the first waveguide channel and the central waveguide channel does not meet the focusing condition, determining that the target angle of the first waveguide channel is a second angle, and rotating all the elliptical structures in the first waveguide channel to the second angle.
6. The incident wave modulation method of claim 5, wherein the determining a focusing condition according to the required focal length comprises:
determining the focusing condition using the following formula:
wherein x isiFor the focusing condition, round { } is a rounding approximation function, λ is the incident wavelength, and f is the desired focal length.
7. The incident wave modulation method according to claim 1, wherein when the modulation requirement is a requirement for performing wavefront transformation, the rotating the elliptical structure in each of the waveguide channels in the waveguide array according to the modulation requirement comprises:
determining a transformation condition corresponding to the wavefront transformation according to the regulation and control requirement;
determining a second waveguide channel with a target angle of a first angle in the waveguide array based on the transformation condition, and determining a third waveguide channel with a target angle of a second angle in the waveguide array;
rotating the elliptical structure in the second waveguide channel to the first angle and rotating the elliptical structure in the third waveguide channel to the second angle.
8. The incident wave modulation method according to any one of claims 5 to 7, prior to separately rotating the elliptical structures in each of the waveguide channels in the waveguide array according to the modulation requirement, comprising:
rotating all elliptical structures in a fourth waveguide channel under the incident wave, and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels;
determining a transmission peak angle according to the transmission spectrum and the phase characteristic diagram, wherein the transmission peak angle is a corresponding rotation angle when a Fabry-Perot resonant transmission peak appears in the fourth waveguide channel;
and determining the first angle and the second angle according to the transmission peak angle, wherein the phase difference between the Fabry-Perot resonant transmission peak corresponding to the first angle and the Fabry-Perot resonant transmission peak corresponding to the second angle is pi.
9. An incident wave regulation and control device based on a metamaterial waveguide array is characterized by comprising:
the incident wavelength acquisition module is used for acquiring the regulation and control requirements of incident waves and the incident wavelengths of the incident waves;
the waveguide unit construction module is used for constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide unit and the elliptical structure are both made of materials meeting the Noemann boundary condition;
a waveguide array constructing module, configured to construct a waveguide array according to the waveguide units, the incident wavelength, and a fabry-perot resonance condition, where the waveguide array includes a plurality of waveguide channels, and the waveguide channels include a plurality of waveguide units;
the elliptical structure rotating module is used for respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;
and the incident wave regulation and control module is used for regulating and controlling the incident wave by using the rotated waveguide array.
10. The incident wave modulation device of claim 9, further comprising:
the transmission spectrum acquisition module is used for rotating all elliptical structures in a fourth waveguide channel under the incident wave and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels;
a transmission peak angle determining module, configured to determine, according to the transmission spectrum and the phase characteristic diagram, a corresponding rotation angle when a fabry-perot resonant transmission peak occurs in the fourth waveguide;
and the first angle determining module is used for determining a first angle and a second angle according to the transmission peak angle, and the phase difference between the Fabry-Perot resonant transmission peak corresponding to the first angle and the Fabry-Perot resonant transmission peak corresponding to the second angle is pi.
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