1. Department of Engineering Science
2. National Cheng Kung University
3. Tainan 701
4. Taiwan
5. Institute of Physics
6. Institute of Materials Research and Engineering
7. A*STAR (Agency for Science, Technology and Research)
8. Singapore 117602
9. Singapore
10. Physics Department
11. National University of Singapore
12. Singapore 117542
13. Academia Sinica
14. Taipei 115
15. Department of Optics and Photonics
16. National Central University
17. Chun-Li 320
18. Research Center for Applied Sciences
19. Ecole Polytechnique Fédérale de Lausanne (EPFL)
20. CH-1015 Lausanne
21. Switzerland