A Tunable Ultra-Wideband Absorber Based on Vanadium Oxide Grating
A technology of vanadium oxide and wave absorbing body is applied in the field of terahertz, which can solve the problems of not wide absorbing frequency band, high cost and high difficulty in preparation, and achieve the effects of simple production, easy construction and stable performance.
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] The embodiment of the tunable ultra-broadband absorber in the terahertz frequency band based on the vanadium oxide grating The structure of an absorber unit is as follows figure 1 and 2 As shown, the lowermost layer is a silicon substrate 1 , and above the silicon substrate are a metal layer 2 , a vanadium oxide layer 3 , a dielectric layer 4 and a vanadium oxide grating 5 .
[0024] In this example, the silicon substrate 1, the metal layer 2, the vanadium oxide layer 3 and the dielectric layer 4 are all squares of 128 microns x 128 microns, and the centers of each layer are on the same straight line, forming a rectangular parallelepiped absorber unit.
[0025] In this example, each grid bar of the vanadium oxide grating 5 is a rectangular line parallel to the rectangular side of the dielectric layer 4 . The thickness of the bars of ...
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