1. Institute of Biophotonics, National Yang-Ming University, Taipei 112, Taiwan
2. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
3. Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan
4. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
5. Biophotonics and Molecular Imaging Research Center, National Yang Ming University, Taipei 112, Taiwan