Prof. Kyungwon An entered Seoul National University in 1979 and studied physics for his bachelor and master degrees. He then studied quantum optics at MIT from 1986 to 1994 for his Ph.D. degree under supervision of Prof. Michael S. Feld. His Ph.D. dissertation was on the realization of the single-atom laser. He came back to Korean as a physics professor at Korea Advanced Institute of Science and Technolgy in Taejon in 1998. There he carred out a research project (housed in Center for Macroscopic Quantum-field Lasers directed by him) funded by Creative Research Initiative of Ministry of Science and Technology from 1999 to 2001. Since December of 2001 he has been an assistant/associate professor at Seoul National University. His current research interests are single-atom trapping, the many-atom microlaser, quantum chaos in deformed microcavities and nanometer-resolution single-molecule microscopy.