Betz, M. and Göger, G. and Leitenstorfer, A. and Zimmermann, R. and Bichler, Max and Wegscheider, Werner and Abstreiter, Gerhard
Femtosecond Optical Response of Exciton-LO Phonon Quasiparticles in GaAs.
physica status solidi a 231 (1), pp. 181-186.
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A weak Fano-type structure one LO phonon energy above the fundamental exciton in bulk GaAs is investigated via highly sensitive femtosecond transmission spectroscopy. It is identified as the response of an exciton-LO phonon quasiparticle. The low-density dephasing time of this excitation is directly determined to be 300 fs. Temperature and carrier density dependent measurements elucidate the ...
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