Photosensitive silicon-based tunable multiband terahertz absorber

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.