1. State Key Laboratory for Mesoscopic Physics, and Electron Microscopy Laboratory, Department of Physics, Peking University, 209 Chengfu Road, Beijing 100871, China
2. Laboratoire d’Optoélectronique Quantique, École Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, Switzerland
3. Attolight AG, EPFL Innovation Square, PSE D, 1015 Lausanne, Switzerland
4. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
5. State Key Laboratory of Mechanics and Control of Mechanical Structures and Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China