Low-Threshold and Tunable Optical Bistability Based on Topological Edge State in One-Dimensional Photonic Crystal Heterostructure With Graphene. - Yuxiang Peng; Jiao Xu; Shenping Wang; Hu Dong; Yuanjiang Xiang; Xiaoyu Dai; Jun Guo; Shengyou Qian; Leyong Jiang (IEEE Access, 2020)