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

Journal Article · · Physical Review B
 [1];  [2];  [3]
  1. Osaka Univ., Toyonaka (Japan); Univ. of Chicago, Chicago, IL (United States)
  2. Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Keio Univ., Yokohama (Japan)

Here, 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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1461540
Alternate ID(s):
OSTI ID: 1439916
Journal Information:
Physical Review B, Vol. 97, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (7)

Dynamically Induced Excitonic Instability in Pumped Dirac Materials journal December 2019
Dispersion relation of the collective excitations in a resonantly driven polariton fluid journal August 2019
Observation of quantum depletion in a non-equilibrium exciton–polariton condensate journal January 2020
Quantum fluctuations in a strongly interacting Bardeen-Cooper-Schrieffer polariton condensate at thermal equilibrium journal January 2020
Nonequilibrium strong-coupling theory for a driven-dissipative ultracold Fermi gas in the BCS-BEC crossover region journal January 2020
Non-Hermitian phase transition from a polariton Bose-Einstein condensate to a photon laser text January 2018
Pump driven normal-to-excitonic insulator transition: Josephson oscillations and signatures of BEC-BCS crossover in time-resolved ARPES text January 2019