1. Research
Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan
2. Graduate
of Electro-Optical Engineering and Department of Electronic and Computer
Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
3. Graduate
Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
4. Department
of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan