1. Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
2. School of Electronics and Information Technology, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, China
3. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China