1. Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, School of Physics and Optoelectronic Engineering, Anhui University, Hefei, 230601, Anhui, P. R. China
2. School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang 277160, Shandong, China