Fei Hong-Ming, Xu Ting, Liu Xin, Lin Han, Chen Zhi-Hui, Yang Yi-Biao, Zhang Ming-Da, Cao Bin-Zhao, Liang Jiu-Qing. Interface of photonic crystal heterostructure for broadening bandwidth of unidirectional light transmissionJ. Acta Physica Sinica, 2017, 66(20): 204103. DOI: 10.7498/aps.66.204103