Quantum Degenerate Exciton-Polaritons in Thermal Equilibrium
H Deng, D Press, S Gotzinger, GS Solomon, R Hey, KH Ploog, Y Yamamoto
TL;DR
This paper investigates how semiconductor microcavity polaritons thermalize and form a quantum degenerate Bose-Einstein distribution in thermal equilibrium, using advanced spectroscopy techniques.
Contribution
It demonstrates that polaritons can reach thermal equilibrium and form a quantum degenerate state under certain pump conditions, revealing new insights into polariton condensation.
Findings
Polaritons thermalize faster than their lifetime at high pump levels
Polaritons form a Bose-Einstein distribution in thermal equilibrium
Thermalization occurs at positive detunings
Abstract
We study the momentum distribution and relaxation dynamics of semiconductor microcavity polaritons by angle-resolved and time-resolved spectroscopy. Above a critical pump level, the thermalization time of polaritons at positive detunings becomes shorter than their lifetime, and the polaritons form a quantum degenerate Bose-Einstein distribution in thermal equilibrium with the lattice.
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