Yong-Tak Lee, Professor at Gwangju Institute of Science & Technology (Dept. Info. & Comm.), 1994: Visiting Scientist, University of Illinois at Urbana-Champaign (Microelectronics Lab) 1986 - 1987: Visiting Scientist, University of Tokyo (Dept.ofElectronicEngineering) 1979 - 1994: Principal Member of Technical Staff, Head (Optoelectronics Section: 1987-1990), Director (Compound Semiconductor Department: 1991-1992), Electronics & Telecommunications Research Institute, Korea.

His research interest are Semiconductor laser, photodetector, optoelectronic integrated circuits - Epitaxial growth, fabrication and characterization of InP and GaAs based compound semiconductor devices - Optical interconnection with VCSEL and PD array - Quantum wire and quantum dot semiconductor devices - Nano scale photonic crystal for optoelectronic devices - Dynamic properties of semiconductor laser, high-speed modulation and short optical pulse generation - Femtosecond optoelectronics for terabit networks