1. Key Laboratory of Acoustic and Photonic Materials and Devices of the Ministry of Education, Department of Physics, Wuhan University, Wuhan, 430072, People's Republic of China, State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China, and National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100081, People's...