1. Laboratory of Infrared Materials and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo 315211, China
2. Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
3. School of Materials Science and Engineering, Hanshan Normal University, Chaozhou 521041, China
4. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
5. Ningbo Institute of Oceanography, Ningbo, 315832, China