Xu Jiao, Peng Yuxiang, Wang Shenping, Jiang Jie, Qian Shengyou, Jiang Leyong
Opt Lett. 2022 Apr 15;47(8):2125-2128. doi: 10.1364/OL.456690.
We investigate the low-threshold optical bistability of transmitted beams at the terahertz range based on the photonic crystal Fabry-Perot cavity with graphene. Graphene with strong nonlinear conductivity is placed in the middle of the Fabry-Perot cavity and the resonance of the cavity plays a positive role in promoting the low-threshold optical bistability. The optical bistability curve is closely related to the incident angle of light, the parameters of graphene, and the structural parameters of the Fabry-Perot cavity. Through parameter optimization, optical bistability with threshold of 10 V/m can be obtained, which has reached or is close to the range of the weak field.
我们基于带有石墨烯的光子晶体法布里-珀罗腔，研究太赫兹波段透射光束的低阈值光学双稳性。具有强非线性电导率的石墨烯置于法布里-珀罗腔中间，腔的共振对促进低阈值光学双稳性起到积极作用。光学双稳性曲线与光的入射角、石墨烯参数以及法布里-珀罗腔的结构参数密切相关。通过参数优化，可获得阈值为10 V/m的光学双稳性，这已达到或接近弱场范围。
