Quasi-two-dimensional excitons in (Zn,Cd)Se/ZnSe quantum wells: Reduced exciton–LO-phonon coupling due to confinement effects
- 15 March 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (11), 6037-6042
- https://doi.org/10.1103/physrevb.45.6037
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 exciton–LO-phonon coupling. As a consequence, excitonic absorption features in this quantum-well system are well preserved to room temperature and beyond.Keywords
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