1. Nano Science and Technology Program; Taiwan International Graduate Program; Academia Sinica; Taipei 115 Taiwan
2. Department of Engineering and System Science; National Tsing Hua University; Hsinchu 30013 Taiwan
3. Institute of Atomic and Molecular Sciences; Academia Sinica; Taipei 10617 Taiwan
4. Center for Condensed Matter Sciences; National Taiwan University; Taipei 10617 Taiwan
5. Institute of Optoelectronic Science; National Taiwan Ocean University; Keelung 202 Taiwan
6. Center for Interdisciplinary Molecular Science; Department of Applied Chemistry; National Chiao Tung University; Hsinchu 300 Taiwan
7. National Synchrotron Radiation Research Center; Hsinchu 30076 Taiwan
8. Graduate Institute of Electro-Optical Engineering; National Taiwan University; Taipei 10617 Taiwan