Second Thresholds in BEC-BCS-Laser Crossover of Exciton-Polariton Systems

Abstract

The mechanism of second thresholds observed in several experiments is theoretically revealed by studying the BEC-BCS-laser crossover in exciton-polariton systems. We found that there are two different types for the second thresholds; one is a crossover within quasi-equilibrium phases and the other is into non-equilibrium (lasing). In both cases, the light-induced band renormalization causes gaps in the conduction and valence bands, which indicates the exsistence of bound electron-hole pairs in contrast to earlier expectations. We also show that these two types can be distinguished by the gain spectra.

10pages, 4figures. Accepted in Physical Review Letters. Several typing errors are corrected

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• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
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Cited by in corpus (38)

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• Second Thresholds in BEC-BCS-Laser Crossover of Exciton-Polariton Systems
• Microscopic description of exciton-polaritons in microcavities
• Pump driven normal-to-excitonic insulator transition: Josephson oscillations and signatures of BEC-BCS crossover in time-resolved ARPES
• Multi-stability and condensation of exciton-polaritons below threshold
• Floquet topological phase of nondriven $p$-wave nonequilibrium excitonic insulators
• High-energy side-peak emission of exciton-polariton condensates in high density regime
• Spin-polarized lasing in a highly photoexcited semiconductor microcavity
• A Room-temperature Spin-polarized Polariton Laser
• Many-Body Open Quantum Systems
• Highly excited exciton-polariton condensates
• Photoluminescence and gain/absorption spectra of a driven-dissipative electron-hole-photon condensate
• Keldysh field theory for nonequilibrium condensation in a parametrically pumped polariton system
• Non-equilibrium properties of a pumped-decaying Bose-condensed electron-hole gas in the BCS-BEC crossover region
• Generating Functional Approach for Spontaneous Coherence in Semiconductor Electron-Hole-Photon Systems
• Polariton Laser in the Bardeen-Cooper-Schrieffer Regime
• Quantum fluctuations in a strongly interacting Bardeen-Cooper-Schrieffer polariton condensate at thermal equilibrium
• Microscopic Theory of Equilibrium Polariton Condensates
• Crossover from exciton-polariton condensation to photon lasing in an optical trap
• Nonequilibrium theory of the conversion-efficiency limit of solar cells including thermalization and extraction of carriers
• Projector-based renormalization approach to electron-hole-photon systems in nonequlibrium steady-state
• Photoluminescence of high-density exciton-polariton condensates
• Observation of the transition from lasing driven by a bosonic to a fermionic reservoir in a GaAs quantum well microcavity
• Ultrafast creation and melting of nonequilibrium excitonic condensates in bulk WSe${}_2$
• Coherent population oscillations and an effective spin-exchange interaction in a $\mathcal{P}\mathcal{T}$ symmetric polariton mixture
• Self-organized PT-symmetry of exciton-polariton condensate in a double-well potential
• Coherence and de-coherence in the Time-Resolved ARPES of realistic materials: an ab-initio perspective
• Multiple-pulse lasing from an optically induced harmonic confinement in a highly photoexcited microcavity
• Spin-Orbit Coupled Exciton-Polariton Condensates in Lead Halide Perovskites
• Metamorphosis of Goldstone and Soft Fluctuation Modes in Polariton Lasers
• Phase diagram of microcavity exciton-polariton condensates
• Quasi-equilibrium polariton condensates in the non-linear regime and beyond
• Quantum coherent states of mass-imbalanced electron-hole system within optical microcavities
• Transient dual-energy lasing in a semiconductor microcavity
• Generation of matter threefold star state by dynamical transfer from photonic counterpart
• Uncover quantumness in the crossover from BEC to quantum-correlated phase