Polariton-generated intensity squeezing in semiconductor micropillars

T. Boulier, M. Bamba, A. Amo, C. Adrados, A. Lemaitre, E. Galopin, I. Sagnes, J. Bloch, C. Ciuti, E. Giacobino and A. Bramati ()
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T. Boulier: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS
M. Bamba: Osaka University, 1-1 Machikaneyama
A. Amo: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS
C. Adrados: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS
A. Lemaitre: Laboratoire Photonique et Nanostructures, CNRS, Route de Nozay
E. Galopin: Laboratoire Photonique et Nanostructures, CNRS, Route de Nozay
I. Sagnes: Laboratoire Photonique et Nanostructures, CNRS, Route de Nozay
J. Bloch: Laboratoire Photonique et Nanostructures, CNRS, Route de Nozay
C. Ciuti: Laboratoire Matériaux et Phénomènes Quantique, Université Paris Diderot et CNRS
E. Giacobino: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS
A. Bramati: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract The generation of squeezed and entangled light fields is a crucial ingredient for the implementation of quantum information protocols. In this context, semiconductor materials offer a strong potential for the implementation of on-chip devices operating at the quantum level. Here we demonstrate a novel source of continuous variable squeezed light in pillar-shaped semiconductor microcavities in the strong coupling regime. Degenerate polariton four-wave mixing is obtained by exciting the pillar at normal incidence. We observe a bistable behaviour and we demonstrate the generation of squeezing near the turning point of the bistability curve. The confined pillar geometry allows for a larger amount of squeezing than planar microcavities due to the discrete energy levels protected from excess noise. By analysing the noise of the emitted light, we obtain a measured intensity squeezing of 20.3%, inferred to be 35.8% after corrections.

Date: 2014
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DOI: 10.1038/ncomms4260

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