Abstract
We theoretically reveal the absorption properties of a 1D periodic structure associated with alternating 3D Dirac semimetals and dielectric layers. The absorption spectra of this structure under both TM and TE polarized waves have been shown, where greatly enhanced absorption is achieved at a certain angle under the TM wave because of the zero effective perpendicular permittivity of the periodic structure. We also reveal that the absorption behavior in this structure can be engineered by the thicknesses of the 3D Dirac semimetal film and the dielectric layer in the unit cell of the periodic structure. In contrast to conventional absorbers made of the metals, the absorption in this periodic structure is highly controllable by the Fermi energy of 3D Dirac semimetals. Our results provide an alternative route to control absorption using 3D Dirac semimetals, which offers alternative options for possible device applications.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Qin Wang and Liwei Zhang
Appl. Opt. 58(31) 8486-8494 (2019)
Pengya Hu, Jun Zhou, Qi Song, and Haixia Da
Appl. Opt. 63(2) 459-466 (2024)
Ting Zhou, Panpan Fang, Shihao Ban, Yong Li, Haiyu Meng, Xiang Zhai, Hongjian Li, and Lingling Wang
J. Opt. Soc. Am. B 37(7) 1987-1995 (2020)