1. Key Laboratory for Photonic and Electronic Bandgap Materials of Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, People's Republic of China
2. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
3. Department of Physics and the Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong SAR, People's Republic of China
4. Department of Physics and International Centre for Quantum and Molecular Structures, Shanghai University, Shanghai, People's Republic of China