Adjustable three-band THz super material absorber based on Dirac material

A technology of metamaterials and absorbers, which is applied in the field of adjustable three-band THz metamaterial absorbers, can solve problems such as complex processing methods, and achieve the effects of polarization insensitivity, high feasibility, and high absorption rate

Inactive Publication Date: 2019-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, because graphene is very thin, when adding electrodes, it requires very complicated processing methods to achieve

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  • Adjustable three-band THz super material absorber based on Dirac material
  • Adjustable three-band THz super material absorber based on Dirac material
  • Adjustable three-band THz super material absorber based on Dirac material

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Embodiment 1

[0031] An adjustable three-band THz metamaterial absorber based on Dirac materials, comprising the following steps:

[0032] It includes a lattice unit composed of a metal absorption layer 1, a dielectric layer 2 and a reflection layer 3, and the reflection layer 3 is a Dirac material. The reflective layer 3 can receive external excitation, so as to realize that the Fermi energy level of the reflective layer 3 is in a variable state.

[0033] In the present invention, the traditional metal reflective layer is changed to a Dirac material, which is also called a Dirac semi-metal, and a Dirac semi-metal is a brand-new strange topological quantum material. The electrons of this material form a three-dimensional Dirac cone structure. The electronic structure of this material has non-trivial topological properties, and it also has surface states similar to topological insulators.

[0034] In the present invention, the Fermi level of the Dirac material can be adjusted by applying a ...

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Abstract

The invention discloses an adjustable three-band THz super material absorber based on a Dirac material. The absorber comprises a lattice unit composed of a metal absorbing layer, a dielectric layer and a reflective layer, and the reflective layer is the Dirac material. The reflective layer receives an external excitation to adjust the Fermi level of the reflective layer so as to adjust the equivalent capacitance between the absorbing layer and the reflective layer, thereby achieving a frequency adjustable characteristic of the absorber.

Description

technical field [0001] The invention relates to the field of metamaterial absorbers, in particular to an adjustable three-band THz metamaterial absorber based on Dirac materials. Background technique [0002] The structure of the traditional metamaterial absorber is composed of three layers. The upper layer is the absorbing layer, the middle is the dielectric layer, and the lower layer is the metal reflective layer. The frequency characteristics of the absorber can be equivalent with the transmission line model, and the frequency characteristics are calculated by RLC. analyze. [0003] With the different directions of research and development, in the research on metamaterial absorbers, the common ones are fixed frequency and adjustable frequency, and there are also single frequency and multi-frequency designs. Generally, the research on adjustable frequency design is to conduct research on the resonant unit of the absorbing layer. Design, the common resonant unit designed w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00G02B5/00
CPCG02B5/003H01Q17/008
Inventor 吕坚孟威威闵道刚廖邦繁阙隆成蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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