Details

Autor(en) / Beteiligte

• Wu, Jipeng
• Liang, Yanzhao
• Guo, Jun
• Jiang, Leyong
• Dai, Xiaoyu
• Xiang, Yuanjiang

Titel

Tunable and Multichannel Terahertz Perfect Absorber Due to Tamm Plasmons with Topological Insulators

Ist Teil von

• Plasmonics (Norwell, Mass.), 2020-02, Vol.15 (1), p.83-91

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

SpringerLink

Beschreibungen/Notizen

• In this paper, Tamm plasmons with topological insulators in a composite structure consisting of Bi 2 Se 3 , spacer layer, and one-dimensional photonic crystal (1DPC) have been demonstrated theoretically. The perfect absorption has been realized in the terahertz regime because of the optical Tamm states (OTSs) excited at the interface between Bi 2 Se 3 and 1DPC. The perfect absorption can be realized for both TE and TM waves, and it is noted that the perfect absorption can be obtained at any incident angle by simultaneously changing the wavelength of incident light for TE-polarizations. Moreover, the perfect absorption can be realized at different wavelengths with the change of the chemical potential and the thickness of Bi 2 Se 3 . The thickness and the dielectric constant of the spacer layer will also play a vital role in the performance of the perfect absorber. Especially, the multichannel perfect absorption phenomenon can be achieved by choosing the appropriate thickness of the spacer layer. This tunable and multichannel terahertz perfect absorber has great application potential in the solar energy, photodetection, and THz biosensor.