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Salisbury screen flexible Terahertz microwave absorber based on DAST and preparation method thereof

A terahertz and wave absorber technology, applied in the terahertz field, can solve the problems of difficult to meet the impedance matching of the terahertz wave absorber, the AC conductivity of the metal film is small, and the production time is long, so as to achieve excellent terahertz absorption performance and save energy. Go to mask making, make simple effects

Inactive Publication Date: 2018-08-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The object of the present invention is to: aim at the phenomenon that the surface layer of the above-mentioned existing wave absorber is a metal film layer, the production time that causes is long, the cost is high and when the thickness of the metal film layer is below 1nm, due to defects, grain boundaries and surface The scattering of electrons makes the AC conductivity of the metal film smaller, and it is difficult to meet the impedance matching problem of the terahertz absorber. The invention provides a DAST-based Salisbury screen flexible terahertz absorber and its preparation method

Method used

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  • Salisbury screen flexible Terahertz microwave absorber based on DAST and preparation method thereof
  • Salisbury screen flexible Terahertz microwave absorber based on DAST and preparation method thereof
  • Salisbury screen flexible Terahertz microwave absorber based on DAST and preparation method thereof

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] figure 1 It is a schematic diagram of the Salisbury screen flexible terahertz absorber based on DAST in this embodiment. The figure shows that the Salisbury screen flexible terahertz wave absorber consists of a three-layer structure from top to bottom including a surface DAST organic material layer 1, an intermediate dielectric film layer 2 and a bottom metal film layer 3. The surface DAST organic material layer It is a kind of DAST organic single crystal or DAST organic thin film, which is composed of a three-layer structure of surface DAST organic material layer / intermediate dielectric film layer / bottom metal film layer. Among them, the bottom metal thin film layer acts as a reflective layer, the middle dielectric thin film layer acts like...

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Abstract

The invention discloses a Salisbury screen flexible Terahertz microwave absorber based on DAST and a preparation method thereof. The absorber comprises a surface-layer DAST organic material layer, anintermediate thin film layer and a base layer metal thin film layer. The surface-layer DAST organic material layer is one kind of a DAST organic single crystal or a DAST organic thin film. The DAST organic single crystal or the DAST organic thin film absorbs waves in the Terahertz waveband. The three layers meet the impedance matching condition of the Salisbury screen flexible Terahertz microwaveabsorber. By use of the Terahertz wave absorption of the DAST organic material layer, the absorber has quite high alternating current conductivity. By designing the whole structure size, impedance matching of the Salisbury screen flexible Terahertz microwave absorber and the free space is achieved; the reflection of the whole Salisbury screen flexible Terahertz microwave absorber structure is allowed to be smallest; and energy absorbed by the structure is converted into thermal energy in the surface-layer DAST organic material layer, so the Salisbury screen flexible Terahertz microwave absorber is allowed to acquire excellent Terahertz absorption performance.

Description

technical field [0001] The invention belongs to the technical field of terahertz, and in particular relates to a DAST-based Salisbury screen flexible terahertz wave absorber and a preparation method thereof. Background technique [0002] Terahertz (THz for short) usually refers to electromagnetic waves with a frequency in the range of 0.1-10 THz. Terahertz has high transparency, so it can be applied in the field of non-destructive testing in the process of security inspection or quality inspection. Moreover, terahertz has low energy and will not cause photoionization to destroy the substance to be tested, so it is very suitable for biopsy of human body or other biological samples. In addition, terahertz also has fingerprint spectrum. Therefore, terahertz detection technology can not only detect the shape of objects, but also identify the components of objects and analyze the physical and chemical properties of objects. Due to these unique advantages of terahertz, terahert...

Claims

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Application Information

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IPC IPC(8): H01Q17/00H05K9/00
CPCH01Q17/00H05K9/0081
Inventor 许向东王福谷雨张敏刚蒋亚东成晓梦周华新梁倩景阳阳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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