Phtophysics and Photochemistry of Molecules in Their
Excited States by using Ultrashort Pulse Lasers (picosecond
and femtosecond). Structural Changes of Molecules in Their
Excited States by Time-resolved Raman Spectroscopy.
Photonic Molecular Devices. Characterization of LB, SAM and
Polyemr Films. Time-resolved Femtosecond Coherent
Spectroscopy.

1984~1985 Princeton University, Department of Chemistry (Research Associate)
1987~1988 Institute for Molecular Science (Japan). Visiting Scientist
1986~1997 Korea Research Institue of Standards & Science, Spectrocopy Lab. Group Leader
1991~1995 Chungnam National University, Adjunct Professor
1991~1991 Korea University, Adjunct Professor
1992~1995 KAIST, Adjunct Professor.
1994~1997 Chungbuk National University, Adjunct Professor
1997~1997 Washington University, Visiting Professor
1997~present Director, Center for Ultrafast Optical Charactersitics Control (National Creative Research Initiatives Program, MOST)
2000~present Yonsei University, Deaprtment of Chemistry, Full Professor

1989 The 1st KRISS scientific paper award.
1994 selected as a KRISS fellow (1st term)
1995 The secretary of state award (The 28th science day)
1995 The 1st Chuibong Award
1997 selected as a KRISS fellow (2nd term)
1999 The scientist of this month (July). (KOSEF, Seoul Economic Newspaper)
2000 selected as a KRISS fellow (3rd term)