1. National Creative Research Initiative Center
for Integrated Optofluidic Systems; Department of Chemical and Biomolecular
Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701,
Korea
2. Advanced Functional
Thin Films Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 641-831, Korea