Exciton Beats in GaAs Quantum Wells: Bosonic Representation and Collective Effects

Details Exciton Beats in GaAs Quantum Wells: Bosonic Representation and Collective Effects Exciton Beats in GaAs Quantum Wells: Bosonic Representation and Collective Effects

1999-09-15

arxiv.org/abs/cond-mat/9909232v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, no figures. Accepted for publication in Solid State Communications

Scientific paper

10.1016/S0038-1098(99)00427-5

We discuss light-heavy hole beats observed in transient optical experiments in GaAs quantum wells in terms of a free-boson coherent state model. This approach is compared with descriptions based on few-level representations. Results lead to an interpretation of the beats as due to classical electromagnetic interference. The boson picture correctly describes photon excitation of extended states and accounts for experiments involving coherent control of the exciton density and Rayleigh scattering beating.

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