CN108732681B - Miniaturized dielectric light nano antenna for inhibiting bidirectional radiation - Google Patents
Miniaturized dielectric light nano antenna for inhibiting bidirectional radiation Download PDFInfo
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- CN108732681B CN108732681B CN201810558504.3A CN201810558504A CN108732681B CN 108732681 B CN108732681 B CN 108732681B CN 201810558504 A CN201810558504 A CN 201810558504A CN 108732681 B CN108732681 B CN 108732681B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/107—Subwavelength-diameter waveguides, e.g. nanowires
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
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Abstract
The invention provides a miniaturized dielectric optical nano antenna for inhibiting bidirectional radiation, which belongs to the technical field of antennas and comprises a reflection grating (3) and a waveguide array, wherein the reflection grating (3) is coated by a coating layer (2), and the reflection grating (3) is arranged below the waveguide array; the waveguide array at least comprises a group of waveguides (1) and radiation gratings (4), wherein the radiation gratings (4) are used for radiating light in the waveguides (1) into free space, and the reflection gratings (3) are used for reflecting the light radiated downwards by the radiation gratings (4) upwards. The invention effectively reduces the size of the antenna unit in the current silicon-based laser phased array, inhibits the two-way radiation, improves the radiation efficiency, and has important application in the fields of space laser communication and laser radar.
Description
Technical Field
The invention belongs to the technical field of antennas, and relates to a miniaturized dielectric optical nano antenna for inhibiting bidirectional radiation.
Background
The silicon-based laser phased array has the advantages of small volume, light weight, high response speed, large scanning range, compatibility with CMOS (complementary metal oxide semiconductor) process and the like, and can realize large-scale integration and mass production. The size and the radiation characteristic of the optical antenna unit have important influence on the scale and the radiation characteristic of the laser phased array, the size of the conventional laser phased array antenna unit is large, the scanning range of the laser phased array is limited, the antenna unit also has bidirectional radiation, and when the antenna unit is used as a transmitting antenna, other equipment can be interfered, and when the antenna unit is used as a receiving antenna, the antenna unit can be interfered by other equipment.
The application number CN201511004760.0, "an optical phased array", discloses an optical phased array, which uses arc grating nano antenna units, and does not relate to straight grating nano antenna units and inhibits bidirectional radiation. Application No.: CN201620134999.3, "a broadband nano antenna", discloses an archimedes spiral nano antenna, which does not relate to a grating nano antenna. The "optical antenna" of application number US200600088238a1 discloses a transceiver system comprising an optical antenna, not relating to a specific antenna form.
Through non-patent literature retrieval, the literature "optical hybrid plasmon patch nano-antenna for waveguide light feed," (Optics Express, vol.20, No.16, 2012, pp18326-18335) proposes a novel optical hybrid plasmon patch nano-antenna operating at a standard telecommunication wavelength of 1550nm, the antenna is composed of metal and medium, and does not involve medium optical nano-antenna and bidirectional radiation. Documents "large-scale nanophotonic phased array," (Nature, vol.493, No.7431, 2013, pp195-199)64 × 64 antenna array and 8 × 8 optical phased array, do not relate to straight grating, miniaturization, suppression of bidirectional radiation, and the like. The literature "large-scale silicon nitride nanophotonic phased arrays working at infrared and visible wavelengths," (Optics Letters, vol.42, No.1, pp 21-24) works at 1550nm and 635nm for two ultra-large aperture optical phased arrays respectively, and does not relate to beam scanning, bidirectional radiation suppression and the like.
At present, in reports at home and abroad, no dielectric optical nano antenna unit which has radiation grating and reflection grating structures and is miniaturized to inhibit bidirectional radiation is available.
Disclosure of Invention
The invention aims to solve the problem of how to design a miniaturized dielectric optical nano-antenna unit for inhibiting bidirectional radiation based on a grating structure so as to inhibit the bidirectional radiation.
The invention provides a miniaturized dielectric optical nano antenna for inhibiting bidirectional radiation, which reduces the distance between silicon-based laser phased array antenna units from 6-fold wavelength to the minimum 1.3-fold wavelength, inhibits the bidirectional radiation and improves the radiation efficiency to 87.6%.
A miniaturized dielectric light nano antenna for inhibiting bidirectional radiation comprises a reflection grating and a waveguide array which are coated by a coating layer, wherein the reflection grating is arranged below the waveguide array; the waveguide array at least comprises a group of waveguides and radiation gratings, wherein the radiation gratings are used for radiating light in the waveguides into free space and reflecting the light radiated downwards by the radiation gratings upwards.
Further, as a preferred technical solution of the present invention: the waveguide array includes four sets of waveguides and radiation gratings.
Further, as a preferred technical solution of the present invention: the radiation grating adopts a straight grating structure.
Further, as a preferred technical solution of the present invention: the waveguide is composed of silicon and silicon dioxide materials.
Further, as a preferred technical solution of the present invention: the antenna operates at 1550 nm.
The invention has the following effects:
compared with the prior art, the miniaturized dielectric optical nano antenna for inhibiting the bidirectional radiation has the advantages that:
1. the antenna adopts a straight grating structure and has the size of wavelength order.
2. The waveguide of the antenna is made of low-loss silicon and silicon dioxide materials, achieving 87.6% radiation efficiency.
3. The bidirectional radiation of the antenna is effectively suppressed.
4. The compact laser phased array capable of being expanded in a large scale can be constructed, and wide-range scanning is realized.
Therefore, the miniaturized dielectric optical nano antenna for inhibiting the bidirectional radiation can effectively reduce the size of the antenna unit in the current silicon-based laser phased array, inhibit the bidirectional radiation, improve the radiation efficiency and the antenna gain, and has important application in the fields of space laser communication and laser radar.
Drawings
FIG. 1 is a three-dimensional block diagram of an antenna of the present invention;
FIG. 2 is a three-dimensional block diagram of an antenna of the present invention employing a1 × 4 waveguide array;
fig. 3 is a two-dimensional radiation pattern of the antenna of the present invention;
fig. 4 is a two-dimensional radiation pattern of the antenna of the present invention using a1 x 4 waveguide array.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention designs a miniaturized dielectric optical nano antenna for inhibiting bidirectional radiation, which comprises a reflection grating 3 and a waveguide array, wherein the reflection grating 3 is coated by a coating layer 2, and the reflection grating 3 is arranged below the waveguide array; the waveguide array is composed of at least one set of waveguides 1 and radiation gratings 4.
As shown in fig. 2, the waveguide array in this embodiment includes four sets of waveguides 1 and radiation gratings 4, the four waveguides 1 are sequentially arranged in four rows in one column, and the four radiation gratings 4 are correspondingly arranged on the right side of each waveguide 1.
Preferably, the radiation grating 4 is a straight grating structure, so that it has a size of the order of a wavelength. And the waveguide 1 is made of silicon and silicon dioxide materials, the radiation efficiency can be improved.
And through the structure with the wavelength-order size, the projection size of the antenna on the x-o-y surface is 3.91 microns multiplied by 1.5 microns, the radiation efficiency of 87.6 percent can be realized, and bidirectional radiation is not generated.
The working principle of the miniaturized dielectric optical nano antenna for inhibiting the bidirectional radiation is as follows: a miniaturized radiation grating 4 is designed with a novel straight grating structure to radiate light in the waveguide 1 into free space. And the reflection grating 3 is designed below the radiation grating 4, the downward radiation light of the radiation grating 4 is reflected upwards, and the distance between the silicon-based laser phased array antenna units is reduced from 6 times of wavelength to the minimum 1.3 times of wavelength, so that the bidirectional radiation is inhibited, the upward radiation energy and radiation efficiency are improved, and the gain is improved.
The present embodiment gives the following simulation data:
fig. 3 is a two-dimensional radiation pattern of the antenna of the present invention at 1550nm with a gain of 12.7dB and no bi-directional radiation.
Fig. 4 is a two-dimensional radiation pattern of a1 x 4 waveguide array at 1550nm for an antenna of the invention. Gain 17.4dB, no bi-directional radiation is generated.
In conclusion, the miniaturized dielectric optical nano antenna unit for inhibiting the bidirectional radiation can effectively reduce the size of the antenna unit in the current silicon-based laser phased array, inhibit the bidirectional radiation and improve the radiation efficiency, and has important application in the fields of space laser communication and laser radar.
It should be noted that the above description is only a preferred embodiment of the present invention, and it should be understood that various changes and modifications can be made by those skilled in the art without departing from the technical idea of the present invention, and these changes and modifications are included in the protection scope of the present invention.
Claims (4)
1. A miniaturized dielectric optical nano antenna for inhibiting bidirectional radiation is characterized by comprising a reflection grating (3) and a waveguide array, wherein the reflection grating (3) is coated by a coating layer (2), and the reflection grating is arranged below the waveguide array; the waveguide array at least comprises a group of waveguides (1) and radiation gratings (4), the radiation gratings (4) are used for radiating light in the waveguides (1) into free space, and the reflection gratings (3) are used for reflecting the light radiated downwards by the radiation gratings (4) upwards; the radiation grating (4) adopts a straight grating structure.
2. The miniaturized dielectrophoretic nanoantenna for suppression of bidirectional radiation according to claim 1, characterized in that the waveguide array comprises four sets of waveguides (1) and radiation gratings (4).
3. The miniaturized dielectrophoretic nanoantenna for suppression of bidirectional radiation according to claim 1, characterized in that the waveguide (1) is composed of silicon and silicon dioxide material.
4. The miniaturized dielectric optical nanoantenna for suppressing bidirectional radiation of claim 1, wherein the antenna operates at 1550 nm.
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| CN201810558504.3A CN108732681B (en) | 2018-06-01 | 2018-06-01 | Miniaturized dielectric light nano antenna for inhibiting bidirectional radiation |
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| CN201810558504.3A CN108732681B (en) | 2018-06-01 | 2018-06-01 | Miniaturized dielectric light nano antenna for inhibiting bidirectional radiation |
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| CN108732681B true CN108732681B (en) | 2020-09-04 |
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| CN109713458A (en) * | 2018-12-04 | 2019-05-03 | 电子科技大学 | A kind of silicon-based nano antenna with single radial characteristic |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623259U (en) * | 2009-12-30 | 2010-11-03 | 中国电子科技集团公司第三十六研究所 | Composite loaded plane helical antenna |
| CN203415681U (en) * | 2013-08-30 | 2014-01-29 | 西北工业大学 | Ultra wide band printing phased array antenna unit with fractal boundary |
| CN103776790A (en) * | 2014-02-25 | 2014-05-07 | 重庆大学 | Infrared spectrum enhancement and detection method and infrared spectrum enhancement and detection device based on graphene nano antenna |
| CN204927534U (en) * | 2015-05-29 | 2015-12-30 | 林春青 | Optional supplementary device of realizing of bluetooth antenna of qxcomm technology's directed radiation |
| CN107346085A (en) * | 2016-04-08 | 2017-11-14 | 韩国科学技术院 | Optical wavelength radiation is adjusted to the light radiator of the radiation angle of free space |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6363619B2 (en) * | 2013-01-08 | 2018-07-25 | マサチューセッツ インスティテュート オブ テクノロジー | Optical phased array |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623259U (en) * | 2009-12-30 | 2010-11-03 | 中国电子科技集团公司第三十六研究所 | Composite loaded plane helical antenna |
| CN203415681U (en) * | 2013-08-30 | 2014-01-29 | 西北工业大学 | Ultra wide band printing phased array antenna unit with fractal boundary |
| CN103776790A (en) * | 2014-02-25 | 2014-05-07 | 重庆大学 | Infrared spectrum enhancement and detection method and infrared spectrum enhancement and detection device based on graphene nano antenna |
| CN204927534U (en) * | 2015-05-29 | 2015-12-30 | 林春青 | Optional supplementary device of realizing of bluetooth antenna of qxcomm technology's directed radiation |
| CN107346085A (en) * | 2016-04-08 | 2017-11-14 | 韩国科学技术院 | Optical wavelength radiation is adjusted to the light radiator of the radiation angle of free space |
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