*Kuan Yu Chen1,2, Chih-Chiang Yang2, Zi-Hao Wang3, Yan-Kuin Su1,2
(1. Department of Electrical Engineering, Institute of Microelectronics, National Cheng Kung University, 2. Green Energy Technology Research Center, Department of Electrical Engineering, Kun Shan University, 3. Advanced Optoelectronic Technology Center, National Cheng-Kung University)