Abstract
In this paper, the terahertz absorber designed has the following features: (1) Constant for double band perfect absorber under different light lightness; (2) Absorptions of 99.60% and 99.79% were obtained at 2.67 THz and 4 THz. (3) Tunable absorption rate under light conditions using photosensitive silicon. (4) TEM, TE, TM, and the increase of the incident angle made the proposed absorber have more absorption bands. (5) The manufactured absorber is a flexible device.Compared with other tunable terahertz metamaterial absorbers, my designed terahertz metamaterial absorber has a simple structure, and the absorption rate can be changed by modulating the light intensity to change the conductivity of the photosensitive silicon, which can meet the absorption requirements under different circumstances. For example, the microstructure has a high potential for high-power terahertz sources, optical biomedical sensing, and detection applications based on multi-band absorption response for optoelectronic technology. The addition of flexible materials paves the way for the future construction of multi-layer absorbers.
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