Exciton-polaritons gas as a nonequilibrium coolant

Abstract

Using angle-resolved Raman spectroscopy, we show that a resonantly excited ground-state exciton-polariton fluid behaves like a nonequilibrium coolant for its host solid-state semiconductor microcavity. With this optical technique, we obtain a detailed measurement of the thermal fluxes generated by the pumped polaritons. We thus find a maximum cooling power for a cryostat temperature of $50$K and below where optical cooling is usually suppressed, and we identify the participation of an ultrafast cooling mechanism. We also show that the nonequilibrium character of polaritons constitutes an unexpected resource: each scattering event can remove more heat from the solid than would be normally allowed using a thermal fluid with normal internal equilibration.

5 pages, 3 figures + supplemental material

References in corpus (3)

• Radiation-pressure cooling and optomechanical instability of a micro-mirror
• Self-cooling of a micro-mirror by radiation pressure
• Cavity polariton optomechanics: Polariton path to fully resonant dispersive coupling in optomechanical resonators

Cited by in corpus (6)

• Valley polarized relaxation and upconversion luminescence from Tamm-Plasmon Trion-Polaritons with a MoSe2 monolayer
• Angular dependence of giant Zeeman effect for semi-magnetic cavity polaritons
• Coherent and incoherent aspects of polariton dynamics in semiconductor microcavities
• Bogoliubov excitations of a polariton condensate in dynamical equilibrium with an incoherent reservoir
• Polariton lasing and energy-degenerate parametric scattering in non-resonantly driven coupled planar microcavities
• Quantum thermodynamics of driven-dissipative condensates