1. Key Laboratory of Photonic and Electric Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, Heilongjiang, People’s Republic of China
2. College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, People’s Republic of China
3. Department of Physics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China