1Guilin University of Electronic Technology, Photonics Research Center, School of Optoelectronic Engineering, Guilin, China
2Guilin University of Electronic Technology, Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin, China
3Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Wuhan, China