Quantum wells with zero valence-band offset: Drastic enhancement of forbidden excitonic transitions

A. Kavokin, M. Kaliteevski, S. Goupalov, J. Berger, O. Lyngnes, H. Gibbs, G. Khitrova

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Abstract

Forbidden (Formula presented) and (Formula presented) exciton transitions (where (Formula presented) and (Formula presented) are heavy-hole and light-hole, respectively) appear in magnetooptical spectra of quantum wells that undergo a type-I-type-II band-alignment transition, here for ordinary (In, Ga)As/GaAs multiple quantum wells and a single CdTe quantum well with a (Cd, Mn)Te semimagnetic barrier exhibiting a giant Zeeman effect. The oscillator strength becomes so strong in a field of 11.25 T that vacuum-field Rabi splitting is clearly seen in reflection spectra when the (Formula presented) exciton transition couples to the two-dimensional optical mode in a microcavity.

Original languageEnglish (US)
Pages (from-to)R11078-R11081
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number16
DOIs
StatePublished - Jan 1 1996

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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