1. National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
2. Key Lab of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China
3. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China
4. State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto‐Electronics Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China
5. National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
6. MIIT Key Laboratory of Display Materials and Devices School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China
7. National Laboratory of Solid State Microstructures School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China