1. Key Laboratory of Opto‐Electronics Information Technology (Tianjin University) Ministry of Education School of Precision Instruments and Opto‐Electronics Engineering Tianjin University No. 92 WeiJin Road Tianjin 300072 China
2. School of Physics and Materials Science Nanchang University Nanchang 330031 China
3. Information Materials and Device Applications Key Laboratory of Sichuan Province Chengdu University of Information Technology Chengdu 610225 China
4. Department of Electrical and Electronic Engineering South University of Science and Technology of China Shenzhen 518055 China