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Journal of the Optical Society of America B

Femtosecond studies of absorption saturation dynamics in GaAs (A)

Wen‐Li Lin, James G. Fujimoto, Erich P. Ippen, Ralph A. Logan

Published Jan 1, 1986• 0 citations
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The dynamical spectral-hole-burning effect, due to selective saturation of the optically coupled states, has been observed in the femto-second regime in a GaAs/AlGaAs multiple quantum well structure. Comparison with previous results on bulk GaAs under similar excitation conditions shows that carrier-carrier collisions are about twice as efficient in the quantum wells, due to the reduction of screening efficiency in two-dimensional structures, as well as the increase of band-gap renormalization with respect to the bulk material.