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A tunable filter based on graphene

A filter and graphene technology, applied in the field of filters, can solve problems such as the inability to realize dynamic adjustment of filter bandwidth, and achieve the effect of dynamic adjustment of bandwidth

Active Publication Date: 2019-01-25
SHANGHAI COSUNET NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem in the prior art that the bandwidth dynamic adjustment of the filter cannot be realized

Method used

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Embodiment 1

[0027] In order to solve the technical problem in the prior art that the bandwidth dynamic adjustment of the filter cannot be realized. The present invention provides a figure 1 The shown graphene-based tunable filter includes a substrate layer 1, which mainly plays a supporting role. The substrate layer 1 can be made of silicon dioxide, quartz, glass, etc., and the top of the substrate layer 1 A semiconductor layer 2 is provided, and the semiconductor layer 2 can be electrically connected to an external control voltage to form a gate control voltage, and a controllable electric field is formed between the graphene layer 5 and the semiconductor layer 2, through which the graphene can be regulated The dielectric constant of layer 5, the top of the semiconductor layer 2 is provided with a reflective layer 3, the top of the reflective layer 3 is provided with a waveguide layer 4, and the refractive index of the reflective layer 3 is smaller than the refractive index of the wavegu...

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Abstract

The invention relates to a tunable filter based on graphene, incluing a substrate layer, A semiconductor layer is arranged above the substrate layer, A reflective layer is arranged above the semiconductor layer, A waveguide layer is arranged above the reflective layer, A graphene layer is arranged above the waveguide layer, the tunable filter based on graphene, By coupling the electromagnetic wavepropagating in the graphene microlayer and the waveguide layer, capable of absorbing electromagnetic wave energy at specific wavelengths, As that filt function is formed, and the semiconductor lay isexternally connected with a regulating voltage, the dielectric constant of the graphene layer can be regulated, so that the graphene lay can be coupled with electromagnetic waves of different frequencies propagating in the waveguide layer, thereby absorbing the energy of electromagnetic waves of different frequencies, thereby realizing the function of dynamically regulating the bandwidth of the filter.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a graphene-based tunable filter. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. It has an ultra-broadband optical response spectrum, strong nonlinear optical properties, and compatibility with silicon-based semiconductor processes, making it suitable for new optical and The field of optoelectronic devices has unique advantages. Under certain conditions, graphene surface conduction electrons interact with photons to form coupled electromagnetic modes (ie, surface plasmons). The coupled electromagnetic mode has strong locality, can break through the diffraction limit, and can be used as an information carrier in an optical coupling device. The biggest advantage of the coupled electromagnetic mode is that its propagation constant can be adjusted by external electric field (or magnetic field) or chemical ...

Claims

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 不公告发明人
Owner SHANGHAI COSUNET NETWORK TECH CO LTD