1. China University of Petroleum (East China), College of Science, Qingdao, Shandong 266580, China
2. Fuzhou University, Institute of Creative Industries Research, Jimei, Xiamen, Fujian 361024, China
3. National Cheng Kung University, Advanced Optoelectronic Technology Center, Institute of Microelectronics & Department of Electrical Engineering, Tainan 70101, Taiwan