1 Institute of Environmental Science and Optoelectronics, University of Science and Technology of China, Hefei, Anhui 230026, China
2 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
3 Key Laboratory of Optical Monitoring Technology for Environment, Anhui Province, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Hefei, Anhui 230031, China
4 School of Computer and Information Security, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
5 Department of Electronic Engineering, Hefei University, Hefei, Anhui 230601, China