1. School of Opto-Electronic and Communication Engineering; Xiamen University of Technology; Xiamen 361024 China
2. Fujian Key Laboratory of Optoelectronic Technology and Devices; Xiamen University of Technology; Xiamen 361024 China
3. Fujian Key Laboratory of Communication Network and Information Processing; Xiamen University of Technology; Xiamen 361024 China
4. Xiamen LED Lighting Engineering Research Center; Xiamen University of Technology; Xiamen 361024 China