Terahertz wave absorption body capable of dynamically and continuously adjusting absorbing bandwidth

Abstract

The invention discloses a terahertz wave absorption body capable of dynamically and continuously adjusting an absorbing bandwidth. Each wave absorption body unit of the wave absorption body mainly comprises a silicon substrate, a silicon nitride layer, an electrode layer and a polycrystalline silicon pattern layer, wherein the upper surface and the lower surface of the silicon nitride layer are respectively adhered to the lower surface of the electrode layer and the upper surface of the silicon substrate; a plurality of holes through which anchor points penetrate; the polycrystalline silicon pattern layer is fixed on the silicon nitride layer through the anchor points; the central axes of the silicon substrate, the silicon nitride layer, the electrode layer and the polycrystalline silicon pattern layer are superposed; the polycrystalline silicon pattern layer comprises a square supporting block, an inner square supporting ring and an outer square supporting ring which are positioned on the same plane, 4 L-shaped clips which are positioned between the inner square supporting ring and the outer square supporting ring, and inner and outer square metal rings which are respectively arranged on surfaces of the square supporting block and the inner square supporting ring. The wave absorption body can be used for dynamically and continuously adjusting the absorbing bandwidth of terahertz wave.

Description

technical field [0001] The invention relates to the technical field of terahertz, in particular to a terahertz absorber with dynamically and continuously adjustable absorption bandwidth. Background technique [0002] In the field of terahertz technology, terahertz absorbers can produce superabsorption for terahertz radiation of a specific frequency, thereby improving the sensitivity of terahertz detectors, which is of great significance for promoting the popularization and application of terahertz technology. Once the existing terahertz absorber is successfully fabricated, the positions of each part are fixed. Therefore, superabsorption can only be produced at a specific frequency or a specific frequency range, and the absorption bandwidth cannot be dynamically and continuously adjusted. However, in the fields of terahertz communication, terahertz detection and frequency-selective terahertz thermal imaging, it is often required that terahertz absorbers can dynamically and co...

AI Technical Summary

Problems solved by technology

Once the existing terahertz absorber is successfully fabricated, the positions of each part are fixed. Therefore, superabsorption can only be produced at a specific frequency or a specific frequency range, and the absorption bandwidth cannot be dynamically and continuously adjusted.

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