1. Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, China
2. College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, China
3. Laboratory of Infrared Materials and Devices, Ningbo University, Ningbo, China
4. Department of Information Science and Electronics Engineering and the Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, China