CN114265215A - Pseudo-phase conjugate reverse modulator based on optical abnormal transmission - Google Patents
Pseudo-phase conjugate reverse modulator based on optical abnormal transmission Download PDFInfo
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Abstract
The invention discloses a pseudo-phase conjugate inverse modulator based on optical abnormal transmission. The optical modulation layer is attached to one surface of the optical abnormal transmission layer or arranged in the optical abnormal transmission layer; and the other surface of the optical abnormal transmission layer is attached with an optical reflection layer. The invention can realize the pseudo-phase conjugate echo of the incident light wave, and simultaneously introduces the optical abnormal transmission layer and the optical modulation layer to realize the high-speed modulation of the light wave intensity, thereby greatly improving the communication and detection speed.
Description
Technical Field
The invention belongs to the technical field of optical modulation, and particularly relates to a pseudo-phase conjugate reverse modulator based on optical abnormal transmission.
Background
When light waves pass through a non-uniform turbulent medium, random distortion phases are introduced, so that the light intensity space-time distribution at the light wave detection position fluctuates, and the performance indexes of systems such as optical communication, optical detection, imaging and the like are seriously influenced. The current common approach is to use adaptive optics, optical phase conjugation techniques. The former, including wavefront phase sensor or phase recovery iterative algorithm and deformable mirror, has the following problems: the device cost is high, the algorithm is complex and time-consuming, and the real-time performance is not high, so the practical application is limited. The latter is generally realized by a nonlinear effect, but the required excitation power is high, the effective area is small, and the realization in an actual application scene is difficult. The other application scenario is that the angle is used for back-and-forth double-pass light transmission, the unit size of the conical reflector can be reduced to a sub-millimeter level, and a micro-angle conical reflector array is constructed. However, the inverse modulator based on the micro-pyramid reflector array needs to use the spatial light modulator to modulate the light wave, but the modulation rate of the spatial light modulator is very low, thereby greatly limiting the application of the high-speed communication and detection fields.
Disclosure of Invention
Aiming at the problem of high-speed modulation in the prior art, the invention provides a pseudo-phase conjugate inverse modulator based on optical abnormal transmission.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pseudo-phase conjugate inverse modulator based on optical extraordinary transmission comprises an optical modulation layer, an optical extraordinary transmission layer and an optical reflection layer; the optical modulation layer is attached to one surface of the optical abnormal transmission layer or arranged in the optical abnormal transmission layer; and the other surface of the optical abnormal transmission layer is attached with an optical reflection layer.
Furthermore, the optical abnormal transmission layer is provided with a small hole, so that incident light waves are converted into surface plasmons, and the surface plasmons are converted into light waves to be emitted.
Furthermore, the optical reflecting layer is a micro-pyramid reflector array to realize light wave back reflection; the bottom surfaces of the reflector units in the micro-pyramid reflector array of the optical reflection layer face the direction of the small holes of the optical abnormal transmission layer, and the small holes corresponding to the range of the bottom surfaces of the reflector units are arranged in a centrosymmetric manner by taking the center of the bottom surfaces of the reflector units as a center.
Furthermore, the electromagnetic property and the phase change property of the optical modulation layer are adjusted by an external electric field and an optical field, and the surface plasmon generated by the optical abnormal transmission layer can be changed along with the change of the property of the optical modulation layer, so that the modulation of the abnormal transmission intensity of the optical wave in a certain waveband is realized.
Compared with the prior art, the optical modulation device can realize the pseudo-phase conjugate echo of the incident light wave, and simultaneously introduce the optical abnormal transmission layer and the optical modulation layer to realize the high-speed modulation of the light wave intensity, thereby greatly improving the communication and detection speed.
Drawings
FIG. 1 is a schematic diagram of a pseudo-phase conjugate inverse modulator based on optical extraordinary transmission according to an embodiment;
FIG. 2 is a schematic diagram of the relationship between an optical modulation layer and an optical extraordinary transmission layer according to an embodiment;
FIG. 3 is a schematic diagram illustrating a relationship between a reflector unit of a micro-pyramid reflector array in an optical reflective layer and a hole in an optical extraordinary transmission layer according to an embodiment;
FIG. 4 is another schematic diagram illustrating the position relationship between the reflector units of the micro-pyramid reflector array in the optical reflective layer and the small holes in the optical extraordinary transmission layer according to an embodiment;
fig. 5 is a schematic diagram of the relationship between the optical modulation layer and the optical extraordinary transmission layer provided in the second embodiment.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The object of the present invention is to provide a pseudo-phase conjugate inverse modulator based on optical extraordinary transmission, which addresses the drawbacks of the prior art.
As shown in fig. 1, the present embodiment provides a pseudo-phase conjugate inverse modulator based on optical extraordinary transmission, which includes three functional layers, namely an optical modulation layer 1, an optical extraordinary transmission layer 2 and an optical reflection layer 3. In this embodiment, the optical modulation layer 1 and the optical extraordinary transmission layer 2 are combined as shown in fig. 2, and the optical modulation layer 1 is attached to one surface of the optical extraordinary transmission layer 2.
In this embodiment, the optical abnormal transmission layer 2 may convert an incident light wave into a surface plasmon, and then convert the surface plasmon into a light wave for emission. The electromagnetic property and the phase change property of the optical modulation layer 1 attached to the surface of the optical abnormal transmission layer 2 can be adjusted by an external electric field and an optical field, so that the surface plasmon can be tuned to a certain extent, and the intensity of abnormal transmission of optical waves in a certain waveband can be controlled.
The other side surface of the optical abnormal transmission layer 2 is bonded with the optical reflection layer 3. In this embodiment, the optical reflection layer 3 is a micro-pyramid reflector array, which realizes the light wave retro-reflection. As shown in fig. 3-4, the bottom surfaces of the reflector units 31 in the micro-pyramid reflector array of the optical reflection layer 3 face the direction of the small holes 21 in the optical abnormal transmission layer 2, and the small holes 21 corresponding to the range of the bottom surfaces of the reflector units 31 are arranged in central symmetry with the center of the bottom surface of the reflector units 31, so that the light wave incident from a certain small hole 21 is reflected by the reflector unit 31 and then just exits through the small hole 21 which is in central symmetry with a certain small hole 21, and the light wave is reflected reversely. The number and arrangement of the holes in the bottom surface of the reflector unit 31 are not limited.
Example two
As shown in fig. 5, the optical modulation layer 1 of the present embodiment is disposed inside the optical abnormal transmission layer 2, and the electromagnetic properties and the phase change properties of the optical modulation layer 1 embedded inside the optical abnormal transmission layer 2 can be adjusted by an applied electric field and an optical field, so that the surface plasmon can be tuned to a certain degree, thereby controlling the intensity of the abnormal transmission of the optical wave in a certain wavelength band.
Other contents of this embodiment can refer to embodiment one.
The invention discloses a pseudo-phase conjugate reverse modulator based on optical abnormal transmission, which consists of an optical modulation layer, an optical abnormal transmission layer and an optical reflection layer, wherein the optical abnormal transmission layer can realize the mutual conversion of light waves and surface plasmons, the optical modulation layer can tune the intensity of transmitted light waves by an external electric field or an optical field, and the optical reflection layer can reversely reflect the light waves. The invention can realize the pseudo-phase conjugate echo of the incident light wave, is used for inhibiting the phase distortion caused by the back and forth passing of the light wave through the non-uniform medium, realizes the high-speed modulation of the retro-reflected light wave, and is used in the fields of optical communication, optical sensing, optical detection and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (4)
1. A pseudo-phase conjugate inverse modulator based on optical extraordinary transmission is characterized by comprising an optical modulation layer, an optical extraordinary transmission layer and an optical reflection layer; the optical modulation layer is attached to one surface of the optical abnormal transmission layer or arranged in the optical abnormal transmission layer; and the other surface of the optical abnormal transmission layer is attached with an optical reflection layer.
2. The pseudo-phase conjugate backward modulator based on optical extraordinary transmission as claimed in claim 1, wherein the optical extraordinary transmission layer is perforated with small holes to convert the incident light wave into surface plasmons and convert the surface plasmons into light waves for emission.
3. The pseudo-phase conjugate backward modulator based on optical extraordinary transmission as claimed in claim 2, wherein the optical reflection layer is a micro-conical reflector array to realize light wave backward reflection; the bottom surfaces of the reflector units in the micro-pyramid reflector array of the optical reflection layer face the direction of the small holes of the optical abnormal transmission layer, and the small holes corresponding to the range of the bottom surfaces of the reflector units are arranged in a centrosymmetric manner by taking the center of the bottom surfaces of the reflector units as a center.
4. The pseudo-phase conjugate backward modulator based on optical extraordinary transmission as claimed in any one of claims 1-3, wherein the electromagnetic properties and phase change properties of the optical modulation layer are adjusted by an external electric field and an optical field, and the surface plasmon generated by the optical extraordinary transmission layer changes with the change of the properties of the optical modulation layer to realize the modulation of the extraordinary transmission intensity of the optical wave in a certain wavelength band.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040936A (en) * | 1998-10-08 | 2000-03-21 | Nec Research Institute, Inc. | Optical transmission control apparatus utilizing metal films perforated with subwavelength-diameter holes |
| US6236033B1 (en) * | 1998-12-09 | 2001-05-22 | Nec Research Institute, Inc. | Enhanced optical transmission apparatus utilizing metal films having apertures and periodic surface topography |
| US20100118390A1 (en) * | 2005-08-02 | 2010-05-13 | Blair Steven M | Sub-wavelength metallic apertures as light enhancement devices |
| CN104166249A (en) * | 2014-07-22 | 2014-11-26 | 南京邮电大学 | Terahertz wave optical modulation device, method and equipment |
| CN106452581A (en) * | 2016-07-28 | 2017-02-22 | 杭州摩焕科技有限公司 | Reverse modulation free space optical communication system based on pseudo phase conjugate reflector |
-
2021
- 2021-12-29 CN CN202111635702.3A patent/CN114265215A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040936A (en) * | 1998-10-08 | 2000-03-21 | Nec Research Institute, Inc. | Optical transmission control apparatus utilizing metal films perforated with subwavelength-diameter holes |
| US6236033B1 (en) * | 1998-12-09 | 2001-05-22 | Nec Research Institute, Inc. | Enhanced optical transmission apparatus utilizing metal films having apertures and periodic surface topography |
| US20100118390A1 (en) * | 2005-08-02 | 2010-05-13 | Blair Steven M | Sub-wavelength metallic apertures as light enhancement devices |
| CN104166249A (en) * | 2014-07-22 | 2014-11-26 | 南京邮电大学 | Terahertz wave optical modulation device, method and equipment |
| CN106452581A (en) * | 2016-07-28 | 2017-02-22 | 杭州摩焕科技有限公司 | Reverse modulation free space optical communication system based on pseudo phase conjugate reflector |
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