1. Institute of Electro-Optical Science and Technology; National Taiwan Normal University; 88, Sec. 4, Ting-Chou Rd. Taipei 116 Taiwan
2. Institute of Photonic System; National Chiao Tung University; Tainan 711 Taiwan
3. Advanced Lighting Technology Department; Green Energy and Environment Research Laboratories; Industrial Technology Research Institute (ITRI); 195, Sec. 4, Chung Hsing Rd. Hsinchu 310 Taiwan
4. Institute of Lighting and Energy Photonics; National Chiao Tung University; 301, Gaofa 3rd Road Tainan 711 Taiwan
5. Department of Physics; Chung Yuan University; 200 Chung Pei Road Chung Li Taoyuang 32023 Taiwan
6. Department of Electrical Engineering; Chang Gung University; 259, Wenhua 1st Rd. Taoyuan 33302 Taiwan
7. Department of Dermatology; Chang Gung Memorial Hospital; 259, Wenhua 1st Rd. Taoyuan 33302 Taiwan