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Single/dual frequency band tunable terahertz wave metamaterial absorber

A dual-band, absorber technology, applied in the field of metamaterials and terahertz wave applications, to achieve the effects of polarization insensitivity, wide-angle absorption, and simple structure

Active Publication Date: 2018-12-18
SHANXI UNIV
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Problems solved by technology

So far, these tunable absorbers can only switch from one frequency band to another, so how to realize the switching between multiple frequency bands is very important for the application of metamaterials. A new type of multi-band with simple structure and easy processing is proposed. Tunable terahertz metamaterial absorbers are particularly urgent

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  • Single/dual frequency band tunable terahertz wave metamaterial absorber

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[0015] In order to make the object, technical solution and results of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] A single / dual-band tunable terahertz wave metamaterial absorber in this embodiment, the absorber includes an upper patterned layer 1, an intermediate dielectric layer 2 and a lower metal base plate 3, wherein the patterned layer 1 and the lower metal base plate 3 are respectively attached to the front and back sides of the dielectric layer 2.

[0017] The upper patterned layer 1 is formed by periodically tiling metal-semiconductor silicon resonators, and the lattice period of the metal-semiconductor silicon resonators is 97.5um˜102.5um. The metal-semiconductor silicon resonator includes a squa...

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Abstract

The invention relates to the technical field of metamaterials and terahertz wave application, and provides a single / dual frequency band tunable terahertz wave metamaterial absorber, aiming at solvingthe problem that the frequency band of the existing tunable terahertz wave metamaterial absorber is single and realizing arbitrary switching of the absorption effect of the single frequency band and the dual frequency band. The single / dual frequency band tunable terahertz wave metamaterial absorber includes an upper patterned layer, an intermediate dielectric layer and a lower metal substrate. Theupper patterned layer is formed of a metal-semiconductor silicon resonator periodically tiled and arranged, and the metal-semiconductor silicon resonator comprises a square ring structure and a cross-shaped structure, wherein the four corners of the square ring structure and the top ends of the cross-shaped structure are embedded with semiconductor silicon respectively. The invention can realizearbitrary switching of a perfect absorption effect of dual-frequency band and single-frequency band.

Description

technical field [0001] The invention belongs to the technical field of metamaterials and terahertz wave applications, in particular to a single / dual frequency band tunable terahertz wave metamaterial absorber. Background technique [0002] Terahertz (THz) waves usually refer to electromagnetic waves with a frequency between 0.1THz and 10THz. They are located between microwaves and infrared light waves in the electromagnetic spectrum. They have strong penetrability, high safety in use, good orientation, and high broadband. characteristics, so that it can be widely used in security monitoring, biomedicine, aerospace, communication and other fields. In recent years, the research of terahertz electromagnetic spectrum technology has created a new field of scientific and technological research, which requires new multifunctional terahertz materials and devices, and electromagnetic metamaterials are one of the solutions to construct high-performance terahertz devices. At present, ...

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Application Information

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IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0086H01Q17/007
Inventor 杨荣草徐建平袁苏张文梅
Owner SHANXI UNIV
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