Effect of dephasing on exciton superradiance and exciton cavity polaritons

Gunnar Björk, Stanley K H Pau, Joseph M. Jacobson, Hui Cao, Yoshihisa Yamamoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Quantum-well exciton superradiance and exciton cavity polarization formation both require a substantial spatial coherence area in order to become the dominant exciton field interaction. In both interaction processes the quantum-well (in-plane) momentum is conserved. Momentum scattering, which is due, e.g., to interaction with a phonon reservoir, quickly localizes an initially delocalized exciton and randomizes the excitation momentum. We take a close look at how momentum scattering influences measurements of excitonic superradiance and of exciton cavity polariton splitting. An important conclusion is that, in general, measurements of the emitted light do not correspond to the evolution of the system as a whole. Therefore, e.g., the measured decay rates do not correspond to the true decay rate of the system.

Original languageEnglish (US)
Pages (from-to)1069-1077
Number of pages9
JournalJournal of the Optical Society of America B: Optical Physics
Volume13
Issue number5
StatePublished - May 1996
Externally publishedYes

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polaritons
excitons
cavities
momentum
decay rates
quantum wells
interactions
scattering
polarization
excitation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Effect of dephasing on exciton superradiance and exciton cavity polaritons. / Björk, Gunnar; Pau, Stanley K H; Jacobson, Joseph M.; Cao, Hui; Yamamoto, Yoshihisa.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 13, No. 5, 05.1996, p. 1069-1077.

Research output: Contribution to journalArticle

Björk, Gunnar ; Pau, Stanley K H ; Jacobson, Joseph M. ; Cao, Hui ; Yamamoto, Yoshihisa. / Effect of dephasing on exciton superradiance and exciton cavity polaritons. In: Journal of the Optical Society of America B: Optical Physics. 1996 ; Vol. 13, No. 5. pp. 1069-1077.
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