Gao, Fei
Gao, Zhen
Shi, Xihang
Yang, Zhaoju
Lin, Xiao
Xu, Hongyi
Joannopoulos, John D.
Soljačić, Marin
Chen, Hongsheng
Lu, Ling
Chong, Yidong
Zhang, Baile
Article History
Received: 22 July 2015
Accepted: 14 April 2016
First Online: 20 May 2016
Competing interests
: The authors declare no competing financial interests.