Polarization dependence of quantum beats in quantum wells: Raman coherence and two-exciton correlations

Scot A. Hawkins, Eric J. Gansen, Martin J. Stevens, I. Rumyantsev, R. Takayama, N. H. Kwong, R. Binder, G. Khitrova, H. M. Gibbs, D. G. Steel, Arthur L. Smirl

Research output: Contribution to journalConference articlepeer-review


Time-integrated differential detection techniques are used to study quantum beats involving the light-hole and heavy-hole excitons in an optically thin InGaAs multiple quantum well. The contributions of the exciton-exciton correlations are separated from those of the intervalence-band Raman coherence and the interband (population) coherence by monitoring the signal in the probe direction and by taking advantage of the polarization selection rules for the excitonic transitions. Quantum beats are observed for pump and probe pulses with the same circular polarization, providing evidence for two-exciton correlations. A theoretical analysis based on the dynamics-controlled truncation formalism suggests that the beats for the same linear polarization arise from Raman, population, and two-exciton contributions.

Original languageEnglish (US)
Pages (from-to)1453-1458
Number of pages6
JournalPhysica Status Solidi C: Conferences
Issue number5
StatePublished - 2003
Event7th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors, NOEKS 2003 - Karlsruhe, Germany
Duration: Feb 24 2003Feb 28 2003

ASJC Scopus subject areas

  • Condensed Matter Physics


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