1 Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2 Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin 300071, China
3 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
4 College of Mathematics and Statistics, Shenzhen University, Shenzhen 518060, China