Quasi-two-dimensional excitons in (Zn,Cd)Se/ZnSe quantum wells: Reduced excitonLO-phonon coupling due to confinement effects

N. T. Pelekanos, J. Ding, M. Hagerott, A. V. Nurmikko, H. Luo, N. Samarth, J. K. Furdyna

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Abstract

Quasi-two-dimensional (2D) excitons in (Zn,Cd) Se/ZnSe quantum wells were investigated. We observed a confinement-induced enhancement of the exciton binding energy to a value greater than the longitudinal-optical (LO) -phonon energy. This unusual condition results in an effective reduction of the excitonLO-phonon coupling. As a consequence, excitonic absorption features in this quantum-well system are well preserved to room temperature and beyond.

Original languageEnglish (US)
Pages (from-to)6037-6042
Number of pages6
JournalPhysical Review B
Volume45
Issue number11
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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