State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083;
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100190;
Beijing Academy of Quantum Information Science Beijing 100193;
Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and Engineering Nanjing University Nanjing 210093;
