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Quantum degeneracy of microcavity polaritons

Augustin Baas·Jean-Philippe Karr·Marco Romanelli·Alberto Bramati·Elisabeth Giacobino
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Abstract

We investigate experimentally one of the main features of a quantum fluid constituted by exciton polaritons in a semiconductor microcavity, that is quantum degeneracy of a macroscopic fraction of the particles. We show that resonant pumping allows to create a macroscopic population of polaritons in one quantum state. Furthermore we demonstrate that parametric polariton scattering results in the transfer of a macroscopic population of polariton from one single quantum state into another one. Finally we briefly outline a simple method which provides direct evidence of the first-order spatial coherence of the transferred population.

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Augustin Baas, Jean-Philippe Karr, Marco Romanelli, Alberto Bramati, Elisabeth Giacobino. 2006-03-01. Quantum degeneracy of microcavity polaritons. https://doi.org/10.1103/physrevlett.96.176401

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