1 School of Physics, Henan Normal University, Xinxiang 453007, China
2 MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China
3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4 Institute of Physics, Henan Academy of Sciences, Zhengzhou 450046, China
5 e-mail: phyzhxd@gmail.com
6 e-mail: tanya@nankai.edu.cn
7 e-mail: zl-zhu@htu.edu.cn