¹ College of Photonic and Electronic Engineering, Fujian Normal University, Fujian Provincial Key Laboratory of Photonic Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fuzhou 350007, Fujian, P. R. China

² Xiamen University of Technology, School of Optoelectronic and Communication Engineering, Xiamen 361024, Fujian, P. R. China

³ School of Engineering and Computer Science, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand