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Conferences > UP > 1994 > MD > MD.6

Femtosecond Coherent Spectroscopy of Excitonic and Free Carrier Polarizations in Bulk GaAs

T. Elsaesser, A. Leitenstorfer, A. Lohner, P. Leisching, T. Kuhn, F. Rossi, and W. Stolz

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Abstract

Femtosecond spectroscopy of coherent optical polarizations gives insight into the dynamics and the coupling of elementary excitations in semiconductors. In this paper, we present spectrally and temporally resolved four-wave-mixing (FWM) studies of undo­ped and p-doped bulk GaAs, providing new information on the nonlinear polarization close to the bandgap. The experimental results are analyzed by theoretical calculations based on the optical Bloch for the FWM geometry including Monte Carlo simulations of the carrier dynamics.

© 1994 Optical Society of America

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