1. School of Materials Science and Engineering, Anhui University, Hefei 230601, China
2. Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China
3. School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, China
4. Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China