CN113504184A - Adjustable and controllable medium chiral nanometer enhancement device and system - Google Patents

Adjustable and controllable medium chiral nanometer enhancement device and system Download PDF

Info

Publication number
CN113504184A
CN113504184A CN202110773209.1A CN202110773209A CN113504184A CN 113504184 A CN113504184 A CN 113504184A CN 202110773209 A CN202110773209 A CN 202110773209A CN 113504184 A CN113504184 A CN 113504184A
Authority
CN
China
Prior art keywords
nanorod
chiral
layer
nanorods
tunable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110773209.1A
Other languages
Chinese (zh)
Other versions
CN113504184B (en
Inventor
王勇凯
董军
王倩颖
李知多
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian University of Posts and Telecommunications
Original Assignee
Xian University of Posts and Telecommunications
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian University of Posts and Telecommunications filed Critical Xian University of Posts and Telecommunications
Priority to CN202110773209.1A priority Critical patent/CN113504184B/en
Publication of CN113504184A publication Critical patent/CN113504184A/en
Application granted granted Critical
Publication of CN113504184B publication Critical patent/CN113504184B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/19—Dichroism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y15/00—Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties
    • G01N2021/216—Polarisation-affecting properties using circular polarised light

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nanotechnology (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Biochemistry (AREA)
  • Biophysics (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

The application relates to a tunable and controllable medium chiral nanometer enhancement device and system, in particular to the field of chiral devices. The application provides chiral nanometer reinforcing means of medium that can regulate and control, the device includes: the device comprises a substrate, a dielectric layer, a disulfide layer and a composite structure layer; the optical signal generates guided mode resonance in the composite structure layer and the dielectric layer and generates surface plasmon polariton resonance on the surface of the metal upper surface, so that the heat loss and surface current of the disulfide layer are enhanced, the optical chirality of the composite structure layer is enhanced, and the purpose of chirality enhancement is finally realized; because the materials of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod are phase-change materials, the change of the temperature enables the conductivity of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod to change, so that the change of the refractive index of the device is caused, namely the device can realize the dynamic regulation and control of CD signals by changing the temperature.

Description

Adjustable and controllable medium chiral nanometer enhancement device and system
Technical Field
The application relates to the field of chiral devices, in particular to an adjustable and controllable medium chiral nanometer enhancement device and system.
Background
Chirality refers to the geometric property of a structure that cannot be superimposed on its mirror image by simple rotation or translation. Chirality is widely found in nature, for example, DNA and proteins. Circular dichroism refers to chiral materials having a difference in absorption or transmission for left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) light due to a difference in the imaginary part of the refractive index. In recent years, artificial chiral nanostructures have been widely studied because of their optical properties that cannot be exhibited by natural chiral materials, such as Circular Dichroism (CD), asymmetric transport effect (AT), negative refractive index, and the like. CD spectroscopy has been used for chiral sensing, selective thermal radiation, chiral imaging, and the like.
In the prior art, researchers have explored chiral enhancement nanostructures based on local surface plasmon polaritons (LSPs) and Surface Plasmon Polaritons (SPP) of metals. For a chiral metal nano system, a hybrid surface plasmon can be generated by adding graphene to enhance a CD signal, and the CD signal can be actively regulated and controlled by adjusting the Fermi level, the voltage control and other modes of the graphene. However, the optical loss of the chiral metal nano system is strong, and in addition, the surface plasmon of the graphene exists in the terahertz and middle and far infrared frequency ranges.
The chiral medium structure in the prior art has weak enhancement on circular dichroism in a visible light wave band, and CD signals cannot be dynamically regulated and controlled.
Disclosure of Invention
The present invention aims to provide an adjustable media chiral nano-enhancing device and system to solve the problems in the prior art that the chiral media structure in the prior art has weak enhancement to circular dichroism in the visible light band, and CD signals cannot be dynamically adjusted.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, the present application provides a tunable media chiral nanoenhancer device, comprising: the device comprises a substrate, a dielectric layer, a disulfide layer and a composite structure layer; the dielectric layer sets up the one side at the basement, the setting of disulfide layer is in the one side that the basement was kept away from to the dielectric layer, the setting of composite material layer is in the one side that the basement was kept away from to the disulfide layer, the composite material layer includes a plurality of nanometer structure portions, every nanometer structure portion all includes first nanorod, the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod all slope the setting on the lateral wall of first nanorod, and the material of at least one in second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod is phase change material.
Optionally, an axial length of the nanostructure portion parallel to the first nanorods is 460nm to 500nm, and an axial length of the nanostructure portion perpendicular to the first nanorods is 460nm to 480 nm.
Optionally, the distance between the same point of the second nanorod and the third nanorod is 140nm-190 nm.
Optionally, the distance between the same points of the fourth nanorod and the fifth nanorod is 140nm-190 nm.
Optionally, the length of the second nanorod is not equal to the length of the third nanorod, and the length of the fourth nanorod is not equal to the length of the fifth nanorod.
Optionally, included angles between the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod and the side wall of the first nanorod are all 45 degrees.
Optionally, the disulfide layer is made of MoS2And/or WS2。
Optionally, the material of the substrate is gold and/or silver.
Optionally, the material of the first nanorod is a high refractive index material.
In a second aspect, the present application provides a tunable media chiral nanoenhancement system, the system comprising: the device comprises a temperature control device, chiral molecular solution, a spectrometer and an adjustable and controllable medium chiral nanometer reinforcing device, wherein the temperature control device is arranged outside a composite structure layer of the device and used for changing the temperature of the composite structure layer, the molecular solution is filled in a gap of the composite structure layer, and the spectrometer is used for detecting the spectrum of emergent light of the device.
The invention has the beneficial effects that:
the application provides chiral nanometer reinforcing means of medium that can regulate and control, the device includes: the device comprises a substrate, a dielectric layer, a disulfide layer and a composite structure layer; the dielectric layer is arranged on one side of the substrate, the disulfide layer is arranged on one side of the dielectric layer, which is far away from the substrate, the composite material layer is arranged on one side of the disulfide layer, which is far away from the substrate, the composite material layer comprises a plurality of nano-structure portions, each nano-structure portion comprises a first nanorod, a second nanorod, a third nanorod, a fourth nanorod and a fifth nanorod, the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod are all obliquely arranged on the side wall of the first nanorod, and at least one of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod is made of a phase-change material; when handedness is required to be enhanced, circularly polarized light is used for irradiating the surface of the device, guided mode resonance is generated between the composite structure layer and the dielectric layer by the optical signal, surface plasmon polariton resonance is generated on the upper surface of the substrate, and further heat loss and surface current of the disulfide layer are enhanced, and further interaction between the circularly polarized light and the device is increased, so that optical chirality of the composite structure layer is enhanced, and the purpose of enhancing handedness is achieved; in addition, because the materials of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod are phase-change materials, the temperature change enables the electrical conductivity of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod to change, so that the refractive index of the device is changed, and further the spectrum of circular dichroism is changed, namely the dynamic control of a CD signal can be realized by changing the temperature.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a front view of a structure of a tunable chiral nanoenhancer device according to an embodiment of the present invention;
FIG. 2 is a top view of a structure of a tunable chiral nanoenhanced device according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the CD enhancement effect of the tunable chiral nano-enhancing device according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating the CD modulation effect of the tunable chiral nano-enhancing device according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating the CD enhancement effect of a tunable chiral dielectric nanoenhancer device according to another embodiment of the present invention;
fig. 6 is a diagram illustrating a CD modulation effect of a tunable dielectric chiral nanoenhancer device according to another embodiment of the present invention.
Icon: 10-a substrate; 20-a dielectric layer; 30-a disulfide layer; 40-a composite structural layer; 41-a first nanorod; 42-second nanorods; 43-a third nanorod; 44-fourth nanorod; 45-fifth nanorod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are one embodiment of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In order to make the implementation of the present invention clearer, the following detailed description is made with reference to the accompanying drawings.
FIG. 1 is a front view of a structure of a tunable chiral nanoenhancer device according to an embodiment of the present invention; FIG. 2 is a top view of a structure of a tunable chiral nanoenhanced device according to an embodiment of the present invention; as shown in fig. 1 and fig. 2, the present application provides a tunable media chiral nanoenhancer device, comprising: substrate 10, dielectric layer 20, disulfide layer 30 and composite structure layer 40; the dielectric layer 20 is disposed on one side of the substrate 10, the disulfide layer 30 is disposed on one side of the dielectric layer 20 far away from the substrate 10, the composite material layer is disposed on one side of the disulfide layer 30 far away from the substrate 10, the composite material layer includes a plurality of nanostructure portions, each nanostructure portion includes a first nanorod 41, a second nanorod 42, a third nanorod 43, a fourth nanorod 44 and a fifth nanorod 45, the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are all obliquely disposed on a side wall of the first nanorod 41, and a material of at least one of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 is a phase change material.
The shape and size of the substrate 10, the dielectric layer 20, and the disulfide layer 30 of the tunable chiral nano-enhancing device of the medium of the present application are determined according to actual needs, and are not specifically limited herein, the dielectric layer 20 is disposed on the top of the substrate 10, the disulfide layer 30 is disposed on the upper portion of the dielectric layer 20, the composite structure layer 40 is disposed on the top of the disulfide layer 30, the composite structure layer 40 includes a plurality of nanostructure portions, the plurality of nanostructure portions are tiled on the top of the dielectric layer 20, so that the composite structure layer 40 is formed on the top of the dielectric layer 20, because the composite structure layer 40 includes the first nanorod 41, the second nanorod 42, the third nanorod 43, the fourth nanorod 44, and the fifth nanorod 45, and the second nanorod 42, the third nanorod 43, the fourth nanorod 44, and the fifth nanorod 45 are respectively disposed around the first nanorod 41 in an inclined manner, the included angles between the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 and the first nanorod 41 are set according to actual needs, and are not specifically limited herein, and the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are respectively set on two opposite sides of the first nanorod 41. When handedness needs to be enhanced, circularly polarized light is used for irradiating the surface of the device, guided mode resonance is generated between the composite structure layer 40 and the dielectric layer 20 by the optical signal, surface plasmon polariton resonance is generated on the surface of the substrate 10, and then heat loss and surface current of the disulfide layer 30 are enhanced, and further interaction between the circularly polarized light and the device is increased, so that optical chirality of the composite structure layer 40 is enhanced, and the purpose of enhancing handedness is achieved; in addition, since the materials of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 are phase-change materials, and the change in temperature causes the change in the electrical conductivity of the second, third, fourth and fifth nanorods 42, 43, 44 and 45, thereby causing the change in the refractive index of the device of the present application, and further causing the change in the spectrum of circular dichroism, that is, the present application can realize dynamic control of CD signals by changing the temperature, the material of at least one of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 is a phase-change material, that is, the second and fourth nanorods 42 and 44 are phase-change materials, the third and fifth nanorods 43 and 45 are reference materials, and the types of the phase-change materials of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 are determined according to actual needs, the phase change material is not particularly limited as long as the phase change material can achieve a change in temperature such that the conductivity of the phase change material is also changed.
The application provides the concrete beneficial effect of device does: (1) the present application generates an absorbing circular dichroism signal by using a phase change material to construct a chiral pattern in the composite structure layer 40 to break symmetry. The composite structure layer 40 and the dielectric layer 20 generate guided mode resonance, and surface plasmon polariton resonance is generated on the surface of the substrate 10, so that the heat loss and surface current of the disulfide layer 30 arranged on the lower surface of the composite structure layer 40 are enhanced, the interaction between circularly polarized light and the dielectric chiral nano device is further improved, and the optical chirality of the dielectric chiral nano device is enhanced. (2) According to the adjustable and controllable medium chiral nanometer enhancement device provided by the invention, the phase-change material is changed from a medium state to a metal state by changing the environmental temperature of the adjustable and controllable medium chiral nanometer enhancement device, and a circular dichroism signal can be dynamically adjusted and controlled.
Alternatively, the axial length of the nanostructure portion parallel to the first nanorods 41 is 460nm to 500nm, and the axial length of the nanostructure portion perpendicular to the first nanorods 41 is 460nm to 480 nm.
The length of the nanostructure portion along the first nanorods 41 may be 460nm, 500nm, or any size between 460nm and 500nm, and the width of the nanostructure portion along the first nanorods 41 may be 460nm, 480nm, or any size between 460nm and 480 nm.
The angles and lengths of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are set to improve the asymmetry of the overall structure, thereby enhancing the CD signal of the overall structure. The addition of disulfide layer 30 may enhance the coupling of the entire structure to incident light, thereby enhancing the overall structure CD.
Optionally, the distance between the same point of the second nanorods 42 and the third nanorods 43 is 140nm-190 nm.
Because the second nanorod 42 and the third nanorod 43 are disposed on the same side of the first nanorod 41, and the included angles between the second nanorod 42 and the first nanorod 41 are the same, that is, the second nanorod 42 and the third nanorod 43 are parallel to each other, for convenience of describing the disposed positions of the second nanorod 42 and the third nanorod 43, the third nanorod 43 is disposed by taking the position where the second nanorod 42 contacts the first nanorod 41 as a starting point and extending any dimension between 140nm and 190nm in the length direction of the first nanorod 41.
Optionally, the distance between the same point of the fourth nanorod 44 and the fifth nanorod 45 is 140nm-190 nm.
Because the fourth nanorod 44 and the fifth nanorod 45 are disposed on the same side of the first nanorod 41, and the included angles between the fourth nanorod 44 and the fifth nanorod 45 and the first nanorod 41 are the same, that is, the fourth nanorod 44 and the fifth nanorod 45 are parallel to each other, for convenience of explaining the disposed positions of the fourth nanorod 44 and the fifth nanorod 45, the fifth nanorod 45 is disposed by taking the position where the fourth nanorod 44 contacts the first nanorod 41 as a starting point, and extending any dimension between 140nm and 190nm in the length direction of the first nanorod 41.
Optionally, the length of the second nanorod 42 is not equal to the length of the third nanorod 43, and the length of the fourth nanorod 44 is not equal to the length of the fifth nanorod 45.
In order to make the asymmetry between the length of the second nanorod 42 and the third nanorod 43 stronger, the length of the second nanorod 42 is set to be not equal to the length of the third nanorod 43, and further the enhanced chirality is stronger, and in addition, in order to make the asymmetry between the length of the fourth nanorod 44 and the fifth nanorod 45 stronger, the length of the fourth nanorod 44 is set to be not equal to the length of the fifth nanorod 45, and further the enhanced chirality is stronger, so the arrangement makes the application have stronger enhancement degree on chirality,
optionally, the included angles between the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod and the side wall of the first nanorod are equal.
In practical applications, the second nanorod 42 and the third nanorod 43 are disposed on one side of the first nanorod 41, the fourth nanorod 44 and the fifth nanorod 45 are disposed on the other side of the first nanorod 41, and in general, the length of the first nanorod 41 parallel to the axial direction is 380nm-400nm, and the length of the first nanorod 41 perpendicular to the axial direction is 90nm-110nm, in practical applications, the included angles between the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 and the first nanorod 41 are all set to be the same angle, that is, the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are disposed parallel to each other, and the materials of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are phase-change materials, that is, under the effect of temperature, the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 make the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45, respectively, The electrical conductivity inside the third, fourth and fifth nanorods 43, 44 and 45 is changed, in practical application, the material of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 is vanadium dioxide or antimony germanium telluride, so that the electrical conductivity of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 increases with the increase of temperature, and vice versa, which is not described in detail herein, and generally, the length of the projection of the second, third, fourth and fifth nanorods 42, 43, 44 and 45 in the axial direction parallel to the first nanorod 41 is 50nm to 60nm, the length of the projection in the axial direction perpendicular to the first nanorod 41 is 80nm to 120nm, and the height of the composite structure layer 40 composed of the first, second, third, fourth and fifth nanorods 41, 42, 43, 44 and 45 is 190nm to 210nm, the refractive index of the material of the dielectric layer 20 is lower than that of the material of the composite structure layer 40, so that the dielectric layer 20 can locally contain more optical field energy, the material of the dielectric layer 20 is generally one or more of silicon dioxide, germanium dioxide and aluminum oxide, and in practical application, the thickness of the dielectric layer 20 is 240nm to 250 nm.
Optionally, included angles between the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod and the side wall of the first nanorod are not equal.
Optionally, the included angles between the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 and the side wall of the first nanorod 41 are all 45 degrees.
When the included angles between the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 and the side wall of the first nanorod 41 are all set to be 45 degrees, the asymmetry of the nanostructure portion is the highest, and the CD signal is the strongest at this time, and in practical application, the included angles between the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 and the side wall of the first nanorod 41 may be any acute angle.
Optionally, the disulfide layer 30 is of MoS2And/or WS2。
The disulfide layer 30 material may be MoS2Or may be WS2May also be MoS2And WS2The mixed material of (3) is not particularly limited herein.
Optionally, the material of the substrate 10 is gold and/or silver.
The material of the substrate 10 may be gold, silver, or a mixture of gold and silver, and is not particularly limited herein.
Optionally, the material of the first nanorods 41 is a high refractive index material.
The present application generates an absorbed circular dichroism signal by constructing a chiral pattern in the composite structure layer 40 using high refractive index materials and phase change materials to break symmetry. The composite structure layer 40 and the dielectric layer 20 generate guided mode resonance, and the surface plasmon polariton resonance is generated on the upper surface of the substrate 10, so that the heat loss and the surface current of the disulfide layer 30 arranged on the lower surface of the composite structure layer 40 are enhanced, the interaction between circularly polarized light and the dielectric chiral nano device is further improved, and the optical chirality of the dielectric chiral nano device is enhanced.
To further illustrate the enhancement of chirality by the device of the present application, numerical simulation data is now used for illustration, as follows:
FIG. 3 is a diagram illustrating the CD enhancement effect of the tunable chiral nano-enhancing device according to an embodiment of the present invention; as shown in fig. 3, the CD spectral intensity is significantly enhanced under excitation of inventive example 1 under circularly polarized light. Without MoS2When CDCNs are at λⅠCD 0.45 at 578nm, λⅡCD at 608nm is 0.14; wherein mode I is obtained based on surface plasmon polariton resonanceThe mode II is obtained based on guided mode resonance. Adding MoS2Thereafter, mode I and mode II are slightly red-shifted and shifted to λ respectivelyⅠ＝580nm，λⅡ612 nm; the CD of mode i was enhanced from 0.45 to 0.8, the CD of mode ii from 0.14 to 0.34, and the CD of mode i and mode ii were enhanced by 1.78 times and 2.43 times, respectively. Therefore, MoS was introduced2The interaction between the nanostructures and the LCP light and the RCP light, respectively, can be enhanced to different degrees, thereby enhancing the overall CD effect. Energy loss is transferred from CDCNs part to MoS2In part, this is at MoS2The two-dimensional surface of the disulfide layer 30 of the present application can realize the enhancement effect of degree chirality, and thus has a certain potential in the aspects of enhancing catalytic reaction and raman scattering spectrum.
FIG. 4 is a diagram illustrating the CD modulation effect of the tunable chiral nano-enhancing device according to an embodiment of the present invention; as shown in FIG. 4, the disulfide layer 30 is CDCNs/MoS2Thermal tunability of the CD effect in disulfides. VO as described above2Can be simulated by varying the temperature-dependent conductivity. FIG. 4 investigates VO2With CD spectra at different conductivities S. In the simulation, S was varied from 200S/m to 100000S/m. CD signal follows VO2The change in (a) is significantly changed, and as the conductivity increases, mode i and mode ii gradually decrease. The depth of adjustment TD is defined as
TD＝(CDmax-CDmin)/CDmax
For further quantifying the scalability of the CD signal. The TD values for mode I and mode II were 49.89% and 32.35%, respectively. This phenomenon demonstrates that we can modulate CDCNs/MoS by changing temperature2The chirality of (c). Considering that two resonance modes are most easily observed when S is 200S/m, we keep the S value unchanged in the above description of the present invention.
FIG. 5 is a diagram illustrating the CD enhancement effect of a tunable chiral dielectric nanoenhancer device according to another embodiment of the present invention; as shown in FIG. 5, example 2 of the present invention is applied to circular polarizationThe CD spectral intensity is significantly enhanced under excitation with light. Without WS2When CDCNs are at λⅠCD 0.45 at 578nm, λⅡCD at 608nm is 0.14; wherein, mode I is obtained based on surface plasmon polariton resonance, and mode II is obtained based on guided mode resonance. Joining WS2Thereafter, mode I and mode II are slightly red-shifted and shifted to λ respectivelyⅠ＝580nm，λⅡ608 nm; the CD of mode i was enhanced from 0.45 to 0.84, the CD of mode ii from 0.14 to 0.43, and the CD of mode i and mode ii were enhanced by 1.87 times and 3.07 times, respectively. Therefore, WS is introduced2The interaction between the nanostructures and the LCP light and the RCP light, respectively, can be enhanced to different degrees, thereby enhancing the overall CD effect. Energy loss transfer from CDCNs part to WS2Part of, this is at WS2The two-dimensional surface of the disulfide layer 30 of the present application can realize the enhancement effect of degree chirality, and thus has a certain potential in the aspects of enhancing catalytic reaction and raman scattering spectrum.
FIG. 6 is a diagram illustrating the CD modulation effect of the tunable chiral nano-enhancing device according to another embodiment of the present invention; as shown in FIG. 6, CDCNs/WS was next studied2Thermal tunability of the medium CD effect. VO as described above2Can be simulated by varying the temperature-dependent conductivity. FIG. 6 investigates VO2CD spectra at different conductivities S. In the simulation, S was varied from 200S/m to 100000S/m. CD signal follows VO2The change of (a) is significantly changed, and as the conductivity increases, mode i gradually decreases and mode ii slightly increases. The adjustment depth TD is defined as TD ═ CDmax-CDmin)/CDmaxFor further quantifying the scalability of the CD signal. The TD values for mode I and mode II were 65.48% and 41.86%, respectively. This phenomenon demonstrates that we can modulate CDCNs/WS by changing temperature2The chirality of (c). Considering that two resonance modes are most easily observed when S is 200S/m, we keep the S value unchanged in the above description of the present invention. Overview the present application may be implemented to implement the present application by varying the temperatureAnd regulating and controlling the chirality.
The application provides chiral nanometer reinforcing means of medium that can regulate and control, the device includes: substrate 10, dielectric layer 20, disulfide layer 30 and composite structure layer 40; the dielectric layer 20 is arranged on one side of the substrate 10, the disulfide layer 30 is arranged on one side of the dielectric layer 20 far away from the substrate 10, the composite material layer is arranged on one side of the disulfide layer 30 far away from the substrate 10, the composite material layer comprises a plurality of nanostructure parts, each nanostructure part comprises a first nanorod 41, a second nanorod 42, a third nanorod 43, a fourth nanorod 44 and a fifth nanorod 45, the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are obliquely arranged on the side wall of the first nanorod 41, and at least one of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 is made of a phase-change material; when handedness needs to be enhanced, circularly polarized light is used for irradiating the surface of the device, and the optical signal generates guided mode resonance between the composite structure layer 40 and the dielectric layer 20, so that surface plasmon polariton resonance is generated on the upper surface of the substrate 10, further, the heat loss and surface current of the disulfide layer 30 are enhanced, further, the interaction between the circularly polarized light and the device of the application is increased, further, the optical chirality of the composite structure layer 40 is enhanced, and the purpose of enhancing handedness is achieved; in addition, because the materials of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 are phase-change materials, the temperature change causes the electrical conductivity of the second nanorod 42, the third nanorod 43, the fourth nanorod 44 and the fifth nanorod 45 to change, thereby causing the change of the refractive index of the device of the present application, and further causing the change of the spectrum of circular dichroism, i.e., the present application can realize dynamic control of CD signals by changing the temperature.
The application provides a medium chirality nanometer reinforcing system that can regulate and control, the system includes: the device comprises a temperature control device, a chiral molecular solution, a spectrometer and any one of the adjustable and controllable medium chiral nanometer enhancement devices, wherein the temperature control device is arranged outside a composite structure layer 40 of the device and used for changing the temperature of the composite structure layer 40, the molecular solution is filled in a gap of the composite structure layer 40, and the spectrometer is used for detecting the spectrum of emergent light of the device.
According to the adjustable composite medium chiral nanometer enhancement system provided by the invention, the chiral molecular solution is covered and arranged on the composite structure layer 40, the chiral signal of the chiral molecule is strongly amplified under the excitation of circularly polarized light, and the chiral enhancement condition is obtained by detecting the left circular light and the right circular light through the spectrometer.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A tunable, chiral nanoenhanced device of a medium, the device comprising: the device comprises a substrate, a dielectric layer, a disulfide layer and a composite structure layer; the dielectric layer is arranged on one side of the substrate, the disulfide layer is arranged on one side, far away from the substrate, of the dielectric layer, the composite material layer is arranged on one side, far away from the substrate, of the disulfide layer, the composite material layer comprises a plurality of nano-structure portions, each nano-structure portion comprises a first nanorod, a second nanorod, a third nanorod, a fourth nanorod and a fifth nanorod, the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod are obliquely arranged on the side wall of the first nanorod, and at least one of the second nanorod, the third nanorod, the fourth nanorod and the fifth nanorod is made of a phase-change material.
2. The tunable, dielectric chiral nanoenhancer device of claim 1, wherein the axial length of the nanostructure portion parallel to the first nanorods is 460nm to 500nm, and the axial length of the nanostructure portion perpendicular to the first nanorods is 460nm to 480 nm.
3. The tunable chiral nanoenhancer device of claim 2, wherein the distance between the same point of the second nanorods and the third nanorods is 140nm-190 nm.
4. The tunable chiral nanoenhancer device of claim 3, wherein the distance between the same point of the fourth nanorods and the fifth nanorods is 140nm-190 nm.
5. The tunable chiral nanoenhancer device of claim 4, wherein the second nanorods have a length unequal to that of the third nanorods, and the fourth nanorods have a length unequal to that of the fifth nanorods.
6. The tunable chiral media nanoenhancer device of claim 5, wherein the second, third, fourth and fifth nanorods are all at 45 ° angles to the sidewall of the first nanorod.
7. The tunable chiral media nanoenhancer device of claim 6, wherein the disulfide layer is MoS2And/or WS2。
8. The tunable chiral media nanoenhancer device of claim 7, wherein the substrate is made of gold and/or silver.
9. The tunable, dielectric, chiral nanoenhancer device of claim 8, wherein the material of said first nanorods is a high refractive index material.
10. A tunable media chiral nanoenhancement system, comprising: the device comprises a temperature control device, a chiral molecular solution, a spectrometer and the adjustable and controllable medium chiral nanometer enhancement device as claimed in any one of claims 1 to 9, wherein the temperature control device is arranged outside a composite structure layer of the device and used for changing the temperature of the composite structure layer, the molecular solution is filled in a gap of the composite structure layer, and the spectrometer is used for detecting the spectrum of emergent light of the device.
CN202110773209.1A 2021-07-08 2021-07-08 Adjustable and controllable medium chiral nanometer enhancement device and system Active CN113504184B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110773209.1A CN113504184B (en) 2021-07-08 2021-07-08 Adjustable and controllable medium chiral nanometer enhancement device and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110773209.1A CN113504184B (en) 2021-07-08 2021-07-08 Adjustable and controllable medium chiral nanometer enhancement device and system

Publications (2)

Publication Number Publication Date
CN113504184A true CN113504184A (en) 2021-10-15
CN113504184B CN113504184B (en) 2022-08-19

Family

ID=78011751

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110773209.1A Active CN113504184B (en) 2021-07-08 2021-07-08 Adjustable and controllable medium chiral nanometer enhancement device and system

Country Status (1)

Country Link
CN (1) CN113504184B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114112933A (en) * 2021-11-12 2022-03-01 西安邮电大学 Dynamic adjustable ultra-narrow band chiral composite nanometer device
CN114167529A (en) * 2021-12-09 2022-03-11 北京化工大学 Structure for chirally regulating and controlling electromagnetic induction transparency phenomenon

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013049921A1 (en) * 2011-10-06 2013-04-11 University Of British Columbia Chiral nematic nanocrystalline metal oxides
WO2013160376A1 (en) * 2012-04-25 2013-10-31 Facultes Universitaires Notre-Dame De La Paix Method for enhancing a sum frequency generation signal
EP3101464A1 (en) * 2015-06-02 2016-12-07 Baden-Württemberg Stiftung gGmbH Device with switchable chiral optical properties, device for polarization modulation, and their use
CN106395738A (en) * 2016-11-10 2017-02-15 陕西师范大学 Chiral nanostructure with adjustable circular dichroism and preparation method thereof
US20180156949A1 (en) * 2016-12-05 2018-06-07 Academia Sinica Broadband meta-optical device
KR20180067079A (en) * 2016-12-12 2018-06-20 성균관대학교산학협력단 Rabies virus mimetic gold nanorods as a platform of photothermal therapeutics for treating brain tumors and method of manufacturing the same
CN109298549A (en) * 2018-12-07 2019-02-01 中山科立特光电科技有限公司 A kind of double F type nanohole arrays and its method for regulating and controlling circular dichroism
CN110148609A (en) * 2019-05-07 2019-08-20 东南大学 One kind being based on Ge2Sb2Te5The restructural display device and method of phase-change material
CN111029416A (en) * 2019-10-30 2020-04-17 北京大学 Circularly polarized light detector and preparation method thereof
CN111896500A (en) * 2020-06-28 2020-11-06 北京大学 Refractive index sensor and method based on metal nanostructure and single-layer TMDS composite system
CN111965849A (en) * 2020-08-26 2020-11-20 东南大学 Controllable chiral structure based on GST phase change material temperature control and control method
CN112764242A (en) * 2021-01-11 2021-05-07 于孟今 Dynamic regulation and control circular dichroism device and system based on memory alloy

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013049921A1 (en) * 2011-10-06 2013-04-11 University Of British Columbia Chiral nematic nanocrystalline metal oxides
WO2013160376A1 (en) * 2012-04-25 2013-10-31 Facultes Universitaires Notre-Dame De La Paix Method for enhancing a sum frequency generation signal
EP3101464A1 (en) * 2015-06-02 2016-12-07 Baden-Württemberg Stiftung gGmbH Device with switchable chiral optical properties, device for polarization modulation, and their use
CN106395738A (en) * 2016-11-10 2017-02-15 陕西师范大学 Chiral nanostructure with adjustable circular dichroism and preparation method thereof
US20180156949A1 (en) * 2016-12-05 2018-06-07 Academia Sinica Broadband meta-optical device
KR20180067079A (en) * 2016-12-12 2018-06-20 성균관대학교산학협력단 Rabies virus mimetic gold nanorods as a platform of photothermal therapeutics for treating brain tumors and method of manufacturing the same
CN109298549A (en) * 2018-12-07 2019-02-01 中山科立特光电科技有限公司 A kind of double F type nanohole arrays and its method for regulating and controlling circular dichroism
CN110148609A (en) * 2019-05-07 2019-08-20 东南大学 One kind being based on Ge2Sb2Te5The restructural display device and method of phase-change material
CN111029416A (en) * 2019-10-30 2020-04-17 北京大学 Circularly polarized light detector and preparation method thereof
CN111896500A (en) * 2020-06-28 2020-11-06 北京大学 Refractive index sensor and method based on metal nanostructure and single-layer TMDS composite system
CN111965849A (en) * 2020-08-26 2020-11-20 东南大学 Controllable chiral structure based on GST phase change material temperature control and control method
CN112764242A (en) * 2021-01-11 2021-05-07 于孟今 Dynamic regulation and control circular dichroism device and system based on memory alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ALEXANDER O. GOVOROV 等: ""Theory of Circular Dichroism of Nanomaterials Comprising Chiral Molecules and Nanocrystals: Plasmon Enhancement，Dipole Interactions, and Dielectric Effects"", 《NANO LETTERS》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114112933A (en) * 2021-11-12 2022-03-01 西安邮电大学 Dynamic adjustable ultra-narrow band chiral composite nanometer device
CN114112933B (en) * 2021-11-12 2023-10-10 西安邮电大学 Dynamic adjustable ultra-narrow band chiral composite nano device
CN114167529A (en) * 2021-12-09 2022-03-11 北京化工大学 Structure for chirally regulating and controlling electromagnetic induction transparency phenomenon
CN114167529B (en) * 2021-12-09 2022-08-30 北京化工大学 Structure for chirally regulating and controlling electromagnetic induction transparency phenomenon

Also Published As

Publication number Publication date
CN113504184B (en) 2022-08-19

Similar Documents

Publication Publication Date Title
Ge et al. Tunable dual plasmon-induced transparency based on a monolayer graphene metamaterial and its terahertz sensing performance
Liu et al. Tunable absorption enhancement in electric split-ring resonators-shaped graphene arrays
CN113504184B (en) Adjustable and controllable medium chiral nanometer enhancement device and system
Luo et al. High-efficiency of infrared absorption by using composited metamaterial nanotubes
Zhong et al. Tunable terahertz broadband absorber based on MoS2 ring-cross array structure
Kang et al. Hybrid plasmonic metasurfaces
Shen et al. Multi-band plasmonic absorber based on hybrid metal-graphene metasurface for refractive index sensing application
Zhang et al. Tunable perfect absorber based on gold grating including phase-changing material in visible range
Ansari et al. Enhancement of light absorption in a WS2 monolayer using spacer and Au layers
Jin et al. Coherent perfect absorber with independently tunable frequency based on multilayer graphene
Guo et al. Broadband absorption enhancement of graphene in the ultraviolet range based on metal-dielectric-metal configuration
Zhang et al. Perovskite nanowires-based graphene plasmonic waveguides with low loss and low gain threshold
Li et al. Ultra-broadband and wide-angle perfect absorber based on composite metal–semiconductor grating
Ma et al. Terahertz metamaterial absorber with switchable function between broadband and dual narrowband
Chi et al. Giant optical activity in plasmonic chiral structure via double-layer graphene moiré stacking in mid-infrared region
Dai et al. Absorption modulation of quasi-BIC in Si–VO2 composite metasurface at near-infrared wavelength
Zheng et al. Multidimensional modulation of light fields via a combination of two-dimensional materials and meta-structures
Li et al. Adjustable electromagnetically induced transparency effect based on graphene surface plasmon
Han et al. One-way two-dimensional photonic crystal absorber combined with graphene
Pei et al. Broadband absorption of monolayer MoS2 in visible region using a tetramerized nanorod metasurface
Liu et al. Dynamic tunable narrow-band perfect absorber for fiber-optic communication band based on liquid crystal
Huang et al. Graphene-enabled active terahertz focusing with wide tuning range
Zhao et al. Tunable terahertz source via liquid crystal grating coated with electron beam excited graphene: a theoretical analysis
Xiong et al. Metamaterial of sodium-graphene for bifunctional perfect absorber
Chen et al. Dual-band, high sensitivity, angle-insensitive graphene—Perfect absorber based on surface plasmon resonance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant