Fei Hong-Ming, Yan Shuai, Xu Yu-Cheng, Lin Han, Wu Min, Yang Yi-Biao, Chen Zhi-Hui, Tian Yuan, Zhang Ya-Min. Photonic crystal heterostructure with self-collimation effect for broad-band asymmetric optical transmissionJ. Acta Physica Sinica, 2020, 69(18): 184214. DOI: 10.7498/aps.69.20200538