Parity non-conservation in atoms. Picosecond spectroscopy.
Excitons, energy transfer in solids and Anderson
localization.
Positronium and muonium spectroscopy. Biophysics. Laser
cooling and trapping of atoms, atom interferometry. Polymer
physics

1978~1987 AT&T 연구원, 전자연구팀장
1987~ Stanford Univ. 물리학 교수, 과장 (1990~1993,
1999~2000)
1989~1996 Optics Letters 편집부위원장
1992~ American Academy of Arts and Sciences 회원
1993~ National Academy of Sciences 회원
1994~ Academica Sinica 회원
1998 Chinese Academy of Sciences 외국인회원
1998~ Editorial board member, Biophysical Journal 편집위
원

1987 Am. Phys. Soc., Broida Prize for Laser
Spectroscopy
1990 APS/AAPT Richtmyer Memorial Prize Lecture
1993 King Faisal International Prize for Science
1994 Am. Phys. Soc., Arthur Schawlow Prize for Laser
Science
1995 Science for Art Prize (Sponsored by LVMH)
1997 노벨물리학상