1. Graduate Institute
of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, Republic of China, 10617
2. Department of Chemistry, University of California, Riverside, Riverside, California 92506, United States
3. Center for Condensed Matter Science, National Taiwan University, and Institute of Atomic and Molecular Science, Academia Sinica, 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, Republic of China, 10617
4. Department of Photonics Engineering, Yuan Ze University, 135 Yuan-Tung Road, Taoyuan, Taiwan, Republic of China, 32003
5. Department of Electro-Optical Engineering, National United University, 1, Lienda Road, Miaoli, Taiwan, Republic of China, 36003