1. Research Center of Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan
2. Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan
3. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
4. Department of Medical Research, China Medical University Hospital, Taichung 40402 Taiwan
5. Department of Electronic Engineering, Chang Gung University, Tao-Yuan 33302, Taiwan