1. School of Mathematics and Physics, Nanyang Institute of Technology, Nanyang 473004, China
2. National Taiwan Science Education Center, Taipei 11165, Taiwan
3. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
4. National Applied Research Laboratories, Taiwan Semiconductor Research Institute, Hsinchu 30078, Taiwan
5. Division of Natural Science, Center for General Education, Chang Gung University, Tao-Yuan 33302, Taiwan