1Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Wuhan, China
2The Chinese University of Hong Kong, School of Science and Engineering, Shenzhen, China
3CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Nanofabrication Laboratory, CAS Key Laboratory for Nanosystems and Hierarchical Fabrication, CAS Key Laboratory for Nanophotonic Materials and Devices, Beijing, China
4National University of Singapore, Department of Electrical and Computer Engineering, Singapore
5University of Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, Beijing, China
6The University of Hong Kong, Department of Physics, Hong Kong, China
7Peking University, School of Physics, State Key Laboratory for Mesoscopic Physics, Beijing, China