Coupler structure based on graphene and three layers of super-surfaces and preparation method

A metasurface, graphene technology, applied in instruments, light guides, optics, etc., can solve the problems of insufficient coupling efficiency and insufficient bandwidth, and achieve the effect of increasing the effective refractive index, reducing the contrast, and increasing the working bandwidth

Active Publication Date: 2020-01-03
WUHAN POST & TELECOMM RES INST CO LTD +1
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Problems solved by technology

[0004] Aiming at the defects existing in the existing couplers, that is, the coupling efficiency is not high enough, the bandwidth is not large enough and the polarization is sensitive, the purpose of the present invention is to provide a high-per

Method used

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  • Coupler structure based on graphene and three layers of super-surfaces and preparation method
  • Coupler structure based on graphene and three layers of super-surfaces and preparation method
  • Coupler structure based on graphene and three layers of super-surfaces and preparation method

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preparation example Construction

[0084] A preparation method based on graphene and three-layer metasurface coupler, comprising:

[0085] Step S1, depositing the third metasurface 4 once, depositing the insulating layer, the first metasurface 2 and the second metasurface 3 multiple times to form at least one first metasurface 2, at least one The second layer of metasurface 3 and a third layer of metasurface 4, the above-mentioned third layer of metasurface 4 is located below the above-mentioned first layer of metasurface 2 and the above-mentioned second layer of metasurface 3, and the insulating layer deposited by multiple layers forms a wrapping all The insulator structure layer 5 of the above-mentioned first layer of metasurface 2, the above-mentioned second layer of metasurface 3 and the above-mentioned third layer of metasurface 4;

[0086] Step S2 , depositing the graphene structure layer 1 on the upper surface of the insulator structure layer 5 .

[0087] Each metasurface 2 of the first layer and metasu...

no. 1 example

[0089] A coupler structure based on graphene and a three-layer metasurface, which can realize high-performance, multifunctional optical coupling, includes a top graphene structure layer 1, a three-layer metasurface (the first layer metasurface 2, the second layer metasurface surface 3 and the third layer of metasurface 4), the insulator structure layer 5 and the underlying electrolyte substrate 8 wrapping the three layers of metasurface.

[0090] The first layer of metasurface 2, the second layer of metasurface 3 and the third layer of metasurface 4 are all single, and the above three layers of metasurface include the first layer of metasurface 2 and the second layer of metasurface for adjusting the direction of the incident light beam 6 and the effective refractive index. The second layer of metasurface 3, and the third layer of metasurface 4 for coupling and transmitting light, the three layers of metasurface are arranged in sequence along the thickness direction. The includ...

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Abstract

A coupler structure based on graphene and three layers of super-surfaces relates to the field of photonic integrated devices and comprises the following parts of at least one first layer of super-surface, at least one second layer of super-surface and a third layer of super-surface that are not contacted mutually, wherein the third layer of super-surface is located at the bottom; an insulator structural layer; a graphene structural layer and a substrate that are respectively arranged on upper and lower surfaces of the insulator structural layer, wherein the refractive indexes of the first andsecond layers of super-surfaces are greater than that of a first insulating layer, and the refractive index of the third layer of super-surface is greater than that of a first sub-structure. By designing the three layers of super-surfaces and the graphene structural layer in the coupler structure provided by the invention, the beam propagation path and effective refractive indexes of each layer are adjusted by the three layers of super-surfaces, the contrast of refractive indexes of the first sub-structure and the third layer of super-surface is reduced, and the operation bandwidth of the coupler is effectively increased; the graphene structural layer can further increase the operation bandwidth of the coupler, and the arrangement structure of matrix unit arrays with three layers of super-surfaces can effectively improve the coupling efficiency of the coupler.

Description

technical field [0001] The invention relates to the field of photonic integrated devices, in particular to a coupler structure and a preparation method based on graphene and a three-layer metasurface. Background technique [0002] In the field of photonic integrated devices, the coupler is an important photonic integrated passive device as a window for transmitting optical path information between devices and between devices and the outside world. There are three most important reference performance indicators for the pros and cons of couplers: coupling efficiency, bandwidth, and polarization dependence. How to improve the coupling efficiency, increase the coupling bandwidth, and reduce the polarization dependence is the key to designing and researching coupling devices with excellent performance. [0003] There are many defects in existing couplers, such as insufficient coupling efficiency, insufficient bandwidth, and polarization sensitivity. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B6/12
CPCG02B1/002G02B6/12G02B2006/12147
Inventor 刘敏胡晓陈代高肖希
Owner WUHAN POST & TELECOMM RES INST CO LTD
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