1. Laboratory of Infrared Materials and Devices, Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China
2. Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, China
3. Department of Electronic Materials Engineering, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
4. Ningbo Institute of Oceanography, Ningbo 315832, China