1. Department of Electrical and Computer Engineering; Seoul National University; Gwanak-ro, Gwanak-gu Seoul 151-744 South Korea
2. Center for Nanoparticle Research; Institute for Basic Science (IBS); Seoul National University; Gwanak-ro, Gwanak-gu Seoul 151-744 South Korea
3. Institute of Entrepreneurial Bio Convergence; Seoul National University; Gwanak-ro, Gwanak-gu Seoul 151-744 South Korea
4. Interdisciplinary Program for Bioengineering; Seoul National University; Gwanak-ro, Gwanak-gu Seoul 151-744 South Korea
5. Department of Electronics and Radio Engineering; Institute for Laser Engineering; Kyung Hee University; Deongyeong-daero, Giheung-gu Yongin-si, Gyeonggi-do 446-701 South Korea