1. Department
of Biological Science and Technology, National Chiao Tung University, 75 Bo Ai Street, Hsinchu, Taiwan, 30068
2. Department
of Electrophysics, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan, 30050
3. National
Center of Theoretical Physics, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan, 30050
4. Department
of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave West, Waterloo, Ontario, Canada N2L3G1
5. Department
of Physics, University of California, San Diego, United States
6. Institute
of Physics, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, Taiwan, 11529