We demonstrate condensation of microcavity polaritons with a very sharp threshold occuring at two orders of magnitude lower pump intensity than previous demonstrations of condensation. The long cavity-lifetime and trapping and pumping geometries are crucial to the realization of this low threshold. Polariton condensation, or "polariton lasing" has long been proposed as a promising source of coherent light at lower threshold than traditional lasing, and these results suggest methods to bring this threshold even lower.
@article{arxiv.1609.08109,
title = {Ultra-low threshold polariton condensation},
author = {Mark Steger and Brian Fluegel and Kirstin Alberi and Angelo Mascarenhas and David W. Snoke and Loren N. Pfeiffer and Ken West},
journal= {arXiv preprint arXiv:1609.08109},
year = {2017}
}