Spin-dependent exciton-exciton interaction in ZnSe quantum wells

D. Tröndle, S. Wachter, D. Lüerssen, H. Kalt, I. J. Blewett, I. Galbraith, K. Ohkawa, D. Hommel

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The loss of phase coherence of optically oriented excitons in ZnSe quantum wells is determined from the decay of the four-wave mixing signal in the presence of a background exciton density generated by a prepulse. The homogeneous linewidth of the exciton resonance strongly depends on the optical orientation, the density, and the spin-relaxation dynamics of the background excitons. Modelling of the data reveals that exciton-exciton interaction including fermion exchange dominates while the exciton-exciton exchange process and dipole-dipole scattering are negligible. Qualitative agreement between theory and experiment is achieved when exciton spin relaxation to dark states is considered.

Original languageEnglish
Pages (from-to)535-538
Number of pages4
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume178
Issue number1
DOIs
Publication statusPublished - Mar 2000
EventOptics of Excitons in Confined Systems (OECS-6) - Ascona, Switz
Duration: 30 Aug 19992 Sep 1999

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