A GaAs polariton light-emitting diode operating near room temperature

Nature
S I TsintzosP G Savvidis

Abstract

The increasing ability to control light-matter interactions at the nanometre scale has improved the performance of semiconductor lasers in the past decade. The ultimate optimization is realized in semiconductor microcavities, in which strong coupling between quantum-well excitons and cavity photons gives rise to hybrid half-light/half-matter polariton quasiparticles. The unique properties of polaritons-such as stimulated scattering, parametric amplification, lasing, condensation and superfluidity-are believed to provide the basis for a new generation of polariton emitters and semiconductor lasers. Until now, polariton lasing and nonlinearities have only been demonstrated in optical experiments, which have shown the potential to reduce lasing thresholds by two orders of magnitude compared to conventional semiconductor lasers. Here we report an experimental realization of an electrically pumped semiconductor polariton light-emitting device, which emits directly from polariton states at a temperature of 235 K. Polariton electroluminescence data reveal characteristic anticrossing between exciton and cavity modes, a clear signature of the strong coupling regime. These findings represent a substantial step towards the realization of ...Continue Reading

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Citations

Jun 2, 2011·Proceedings of the National Academy of Sciences of the United States of America·Lambert K van VugtRitesh Agarwal
Apr 12, 2012·Science·Peter CristofoliniJeremy J Baumberg
Sep 15, 2015·Nature Materials·E OrgiuT W Ebbesen
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Apr 20, 2018·Accounts of Chemical Research·Ankur SharmaYuerui Lu

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