Graphene-based low-threshold and tunable optical bistability in one-dimensional photonic crystal Fano resonance heterostructure at optical communication band.
Graphene-based low-threshold and tunable optical bistability in one-dimensional photonic crystal Fano resonance heterostructure at optical communication band.
复制标题
基于石墨烯的一维光子晶体Fano共振异质结构在光通信波段的低阈值可调谐光学双稳态。
DOI：
10.1364/oe.408632
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发表时间：
2020-11
期刊：
影响因子：
3.8
通讯作者：
Yuxiang Peng;Jiao Xu;H. Dong;X. Dai;Jie Jiang;Shengyou Qian;Leyong Jiang
中科院分区：
文献类型：
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作者：
Yuxiang Peng;Jiao Xu;H. Dong;X. Dai;Jie Jiang;Shengyou Qian;Leyong Jiang
本文利用一维光子晶体Fano共振异质结实现了光通信波段透射光和反射光的低阈值可调石墨烯基光学双稳态。光学双稳的低阈值源于拓扑边缘态模和法布里-珀罗腔模激发的Fano共振产生的局域场增强。研究发现，通过分别改变左右石墨烯的费米能级，可以连续调节其滞后行为和光学阈值。此外，还可以通过改变石墨烯层数或入射光的角度来控制光学带隙，这使得该结构成为未来光通信波段实验研究的可行对象。
In this paper, the one-dimensional photonic crystal Fano resonance heterostructure is used to achieve low-threshold and tunable graphene-based optical bistability of the transmitted and reflected light beam at optical communication band. The low-threshold of optical bistability (OB) originates from the local field enhancement owing to the Fano resonance excited by topological edge states mode and Fabry-Perot cavity mode. The study found that it is feasible to continuously adjust the hysteresis behavior and optical bistable thresholds by altering the Fermi energy of the left and right graphene respectively. Furthermore, the OB can also be controlled by changing the number of graphene layers or the angle of incident beam, which makes this structure a feasible object of experimental research at optical communication band in the future.