Polariton Laser in the Bardeen-Cooper-Schrieffer Regime
arXiv:1902.00142 · doi:10.1103/PhysRevX.11.011018
Abstract
Microcavity exciton polariton systems can have a wide range of macroscopic quantum effects that may be turned into better photonic technologies. Polariton Bose-Einstein condensation and photon lasing have been widely accepted in the limits of low and high carrier densities, but identification of the expected Bardeen-Cooper-Schrieffer (BCS) state at intermediate densities remains elusive, as the optical-gain mechanism cannot be directly inferred from existing experiments. Here, using a microcavity with strong polarization selectivity, we gain direct experimental access to the reservoir absorption in the presence of polariton condensation and lasing, which reveals a fermionic gain mechanism underlying the polariton laser. A microscopic many-particle theory shows that this polariton lasing state is consistent with an open-dissipative-pumped system analog of a polaritonic BCS state.
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Cited by in corpus (10)
- Spontaneous coherence in spatially extended photonic systems: Non-Equilibrium Bose-Einstein condensation
- Low-energy collective oscillations and Bogoliubov sound in an exciton-polariton condensate
- Exciton-phonon-scattering: A competition between bosonic and fermionic nature of bound electron-hole pairs
- Crossover from exciton-polariton condensation to photon lasing in an optical trap
- Metamorphosis of Goldstone and Soft Fluctuation Modes in Polariton Lasers
- Symmetry breaking and superfluid currents in a split-ring spinor polariton condensate
- Terahertz Spectroscopy of Semiconductor Microcavity Lasers I: Photon Lasers
- Quasi-equilibrium polariton condensates in the non-linear regime and beyond
- Collective terahertz fluctuation modes in a polariton laser
- BCS-BEC crossover of polaritonic condensates in mass-imbalanced semimetal/semiconductor microcavities