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Terahertz plane adsorbing material

A technology of absorbing materials and wave planes, applied in the field of electromagnetic functional materials, to achieve the effects of easy design, good adjustability, and improved performance and efficiency

Inactive Publication Date: 2010-05-05
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

Although multi-band terahertz absorbers can have a richer range of applications, so far no multi-band terahertz absorbing materials have been proposed

Method used

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Embodiment Construction

[0020] Design a terahertz wave planar absorbing material with two absorption frequency bands at 0.2-3THz, and the absorption rate reaches more than 85%. Using CST software, build as image 3 The multilayer structure shown includes a substrate, a metal reflective layer, a dielectric layer and an artificial electromagnetic dielectric layer. The structure of the artificial electromagnetic medium unit is as follows: Figure 4 As shown, it is a centrosymmetric figure formed by a metal thin film line with a line width of t (such as Figure 4 shown), including an electric split ring resonator formed by connecting two single-split metal rings in the middle, wherein the openings of the two single-split metal rings are connected to each other to form the opening of the electric split ring resonator; The electric split ring resonator has a single split metal ring with the long sides facing away from the connection. The length of the overall artificial electromagnetic medium unit is b,...

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Abstract

The invention provides a terahertz plane adsorbing material, belonging to the technical field of electromagnetic function materials and relating to an electromagnetic-wave absorbing material. The terahertz plane adsorbing material comprises a substrate, a metal reflecting layer, a dielectric layer and an artificial electromagnetic medium layer; wherein, the metal reflecting layer is a continuous metal film and is arranged on the surface of the substrate; the dielectric layer is arranged between the metal reflecting layer and the artificial electromagnetic medium layer; the artificial electromagnetic medium layer is composed of artificial electromagnetic medium units which are arrayed periodically, each unit is a centro-symmetric figure formed by metal film lines with line width which is t and comprises two sing-opening metal rings which are connected backwards with long edges at two sides of an electric snap ring resonator. The terahertz plane adsorbing material provided by the invention has two strong-absorption frequency ranges, so as to provide selective adsorption and detection at different frequency ranges, and the terahertz radiation with wider spectral range can be adsorbed, so as to improve the performance and efficiency of the terahertz plane adsorbing material.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional materials, and relates to electromagnetic wave absorbing materials, especially terahertz wave absorbing materials. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves with a frequency from 0.1THz to 10THz, between millimeter waves and infrared light. This frequency band is the frequency band for the transition from macroelectronics to microphotonics, and can cover the unique advantages of semiconductors, plasmas, organisms and biomacromolecular characteristic spectra. THz technology can be widely used in radar, remote sensing, homeland security and anti-terrorism, highly confidential data communication and transmission, atmospheric and environmental monitoring, real-time biological information extraction, and medical diagnosis. Therefore, THz research has great application value to national economy and national security. [0003] Artificial elect...

Claims

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Application Information

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IPC IPC(8): G02F1/35H01P1/20
Inventor 文岐业张怀武杨青慧谢云松刘颖力李元勋
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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