Title :
Time-resolved four-wave-mixing signal in thick bulk GaAs
Author :
Sungkyu Yu ; Joo In Lee ; Eun-Joo Shin
Author_Institution :
Optoelectron. Group, Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
Abstract :
Summary form only given. Time-integrated (TI) and time-resolved (TR) four-wave-mixing (FWM) techniques have been employed successfully to study the relaxation dynamics of coherent excited states in semiconductors and semiconductor quantum wells. A large number of experimental and theoretical studies on FWM have been mainly focused on the resonant FWM signals in thin semiconductors with thicknesses of less than 1 /spl mu/m so far. If the sample is optically thick, however, the input pulse is severely distorted and the propagation effect of the generated FWM signal becomes more and more important and complicated. We performed the TI- and TR-FWM experiments and measured the pulse shape of the transmitted probe beam in the presence of a pump beam for a 500-/spl mu/m and a 100-/spl mu/m-thick undoped GaAs.
Keywords :
excited states; excitons; gallium arsenide; high-speed optical techniques; multiwave mixing; optical pumping; 100 mum; 500 mum; GaAs; coherent excited states; generated FWM signal; input pulse; pump beam; resonant FWM signals; semiconductor quantum wells; thick bulk GaAs; time-resolved four-wave-mixing signal; time-resolved four-wave-mixing techniques; transmitted probe beam; Gallium arsenide; Laser excitation; Optical distortion; Optical propagation; Optical pulse generation; Optical pulse shaping; Optical pumping; Pulse measurements; Resonance; Shape measurement;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-608-7
