Broadband transmission type infrared light modulator based on graphene plasmas

A plasma and graphene technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of low modulation depth and modulation bandwidth, and achieve the effect of increasing modulation depth, increasing modulation bandwidth, and wide modulation bandwidth
CN111458906APending Publication Date: 2020-07-28SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2020-07-28

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Abstract

The invention belongs to the field of optical devices. In order to improve the modulation depth and bandwidth of the modulator, the invention provides a broadband transmission type infrared light modulator based on graphene plasmas. The infrared light modulator comprises a substrate, the substrate is covered with a graphene modulation layer, the modulation layer is provided with a non-metal grating layer through coating-etching, the non-metal grating layer is provided with a metal grating layer through coating, and the two sides of the substrate are provided with a first electrode and a secondelectrode through coating respectively. Graphene is coupled with a non-metal grating layer; the excellent polarization characteristic of the metal grating and the field constraint capability for further enhancing the graphene local surface plasmon polariton are utilized; the structure has strong reflection on TE linear polarization incident light, transmission modulation with high modulation depth in a broadband range can be realized on TM linear polarization incident light, and the characteristic can realize a modulation function with high modulation depth and wide modulation bandwidth on transmission light when natural light is incident.
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Description

technical field

[0001] The invention relates to the technical field of optical devices, in particular to a broadband transmissive infrared light modulator based on graphene plasma. Background technique

[0002] As a two-dimensional material, graphene is composed of a single layer of carbon atoms arranged in a honeycomb lattice structure. Its flexible and bendable characteristics enable it to be combined with a metasurface structure; and graphene has an ultra-wide control bandwidth (from near-infrared to terahertz), ultra-high carrier mobility can reach 200,000 cm 2 / (V×s), which makes it possible to realize broadband ultrafast optoelectronic devices. As the core device in the optical interconnection of chips, the optical modulator has a very important application prospect in the future. In recent years, research on graphene light modulators has been extensively studied by scholars at home and abroad.

[0003] In order to improve the modulation depth and modulation bandwid...

Claims

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