1. Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan
2. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
3. Department of Physics, National Central University, Chung-Li 320, Taiwan
4. Department of Physics, National Taiwan University, Taipei 106, Taiwan
5. Physics Division, National Center for Theoretical Sciences, Taipei 106, Taiwan
6. Institute of Opto-Mechatronics, National Chung Cheng University, Chia-Yi 62102, Taiwan
7. Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
8. Department of Physics, Indian Institute of Science, Bangalore 560012, India
9. Advanced Research Centre for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan