Details

Autor(en) / Beteiligte

• Zhang, Huayue
• Long, Xin
• Yuan, Hongxia
• Dai, Xiaoyu
• Li, Zhongfu
• Jiang, Leyong
• Xiang, Yuanjiang

Titel

Dirac semimetals Tamm plasmons-induced low-threshold optical bistability at terahertz frequencies

Ist Teil von

• Results in physics, 2022-12, Vol.43, p.106054, Article 106054

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •Low threshold optical bistability based on optical Tamm states in three-dimensional Dirac semimetals, isolation layer and one-dimensional photonic crystal composite multilayer structure.•The optical bistability of optical Tamm states in one-dimensional photonic crystal composite structure based on three-dimensional Dirac semimetals provides a new idea for the design of nonlinear optical bistable devices. In this paper, we theoretically study the optical bistability (OB) of reflected beams in a composite multilayer structure with three-dimensional Dirac semimetals (3D DSMs) and one-dimensional photonic crystal (1D PC) on both sides of the spacer layer. The optical Tamm states (OTSs) excited by the 3D DSMs-1D PC multilayer structure significantly enhances the local electric field near the nonlinear 3D DSMs, which provides a positive condition for the realization of low threshold OB. Through parameter optimization, we obtain a threshold electric field with an incident electric field of 106 V/m levels. Furthermore, the influences of the Fermi energy of 3D DSMs, the angle of the incident light and dispersion characteristics of the spacer layer on the hysteretic behavior and the threshold of OB are clarified. We believe above results will provide possible options for nonlinear optical bistable devices.