1. Centre for Micro and Nano Systems, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China
2. Department of Automation and Computer-Aided Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China
3. Center for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China
4. Department of Biochemistry, Faculty of Science, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China