Photoluminescence and gain/absorption spectra of a driven-dissipative electron-hole-photon condensate

Ryo Hanai, Peter B. Littlewood, Yoji Ohashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigate theoretically nonequilibrium effects on photoluminescence and gain/absorption spectra of a driven-dissipative exciton-polariton condensate, by employing the combined Hartree-Fock-Bogoliubov theory with the generalized random phase approximation extended to the Keldysh formalism. Our calculated photoluminescence spectra is in semiquantitative agreement with experiments, where features such as a blue shift of the emission from the condensate, the appearance of the dispersionless feature of a diffusive Goldstone mode, and the suppression of the dispersive profile of the mode are obtained. We show that the nonequilibrium nature of the exciton-polariton condensate strongly suppresses the visibility of the Bogoliubov dispersion in the negative energy branch (ghost branch) in photoluminescence spectra. We also show that the trace of this branch can be captured as a hole burning effect in gain/absorption spectra. Our results indicate that the nonequilibrium nature of the exciton-polariton condensate strongly reduces quantum depletion, while a scattering channel to the ghost branch is still present.

Original languageEnglish
Article number245302
JournalPhysical Review B
Volume97
Issue number24
DOIs
Publication statusPublished - 2018 Jun 1

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Excitons
condensates
Absorption spectra
Photoluminescence
Photons
polaritons
absorption spectra
photoluminescence
Electrons
excitons
photons
ghosts
Bogoliubov theory
Visibility
hole burning
blue shift
visibility
Scattering
depletion
retarding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Photoluminescence and gain/absorption spectra of a driven-dissipative electron-hole-photon condensate. / Hanai, Ryo; Littlewood, Peter B.; Ohashi, Yoji.

In: Physical Review B, Vol. 97, No. 24, 245302, 01.06.2018.

Research output: Contribution to journalArticle

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