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Terahertz converter capable of realizing power-absorbing mode and polarization conversion mode switching

A polarization conversion and mode switching technology, applied in the terahertz field, can solve problems such as device separation, and achieve the effects of polarization conversion and power absorption

Pending Publication Date: 2019-03-08
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] What the present invention aims to solve is the problem that the existing devices that realize the wave-absorbing mode and the polarization conversion mode are all separate devices, that is, the problem that one device can only realize the wave-absorbing mode or only the polarization conversion mode, and provide a A terahertz converter capable of switching between absorbing mode and polarization conversion mode

Method used

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be noted that the directional terms mentioned in the examples, such as "upper", "lower", "middle", "left", "right", "front", "rear", etc., are only referring to the directions of the drawings. Therefore, the directions used are only for illustration and are not intended to limit the protection scope of the present invention.

[0022] A terahertz converter capable of switching between absorbing mode and polarization conversion mode, which mainly consists of 2 graphene layers, 1 metal polarization conversion metasurface layer 2, 1 metal reflective layer 4 and 3 dielectric layers 3 composition.

[0023] Each graphene layer is composed of an electrode layer 1-2 and a graphene supersurface layer 1-1 attached to the upper...

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Abstract

The invention discloses a terahertz converter capable of realizing power-absorbing mode and polarization conversion mode switching. The terahertz converter is composed of two graphene layers, one metal polarization conversion metasurface layer, one metal reflecting layer and three medium layers; each graphene layer is composed of an electrode layer and a graphene meta-surface layer adhered on an upper surface of the electrode layer; bias voltage V1 is applied between the graphene metasurface layer of one graphene layer and the electrode layer so as to adjust the Fermi energy EF1 of the graphene layer; and meanwhile, the bias voltage V1 is applied between the graphene metasurface layer of the other graphene layer and the electrode layer so as to adjust the Fermi energy EF2 of the graphene layer; when one of the Fermi energy EF1 and / or Fermi energy EF2 exceeds a switching threshold, the terahertz converter works at a power-absorbing mode; or the terahertz converter works at a polarization conversion mode. The terahertz converter provided by the invention can solve the problem that the single device cannot realize the polarization conversion and the power absorption at the same time.

Description

technical field [0001] The invention relates to the field of terahertz technology, in particular to a terahertz converter capable of switching between a wave absorbing mode and a polarization conversion mode. Background technique [0002] Absorbers and polarization converters for terahertz waves play very important applications in the fields of electromagnetic measurement, antenna design, low radar cross-section design, THz imaging and sensing. New wave absorbers and polarization converters based on metasurfaces are widely used because of their light weight and simple structure; and graphene materials are applied to metasurface wave absorbers and poles because of their adjustable conductivity. In the design of the converter, realize the characteristics of broadband. However, at present, the devices that realize wave-absorbing and polarization-converting characteristics are all separate devices; that is, one device can only realize wave-absorbing characteristics, or only rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/16H01P1/161H01P1/165
CPCH01P1/16H01P1/161H01P1/165
Inventor 彭麟姜兴李晓峰廖欣李小明
Owner GUILIN UNIV OF ELECTRONIC TECH
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