1. Department
of Physics and Center for Nanotechnology, Chung Yuan Christian University, Chung-Li, Taiwan
2. Department
of Chemistry, Center for Nanotechnology and Center for Biomedical
Technology, Chung Yuan Christian University, Chung-Li, Taiwan
3. Advanced Optoelectronic Technology Inc., Hsinchu, Taiwan
4. Department
of Photonic and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsin-Chu, Taiwan