Optical nonlinearity for few-photon pulses on a quantum dot-pillar cavity device

Giant optical nonlinearity is observed under both continuous wave and pulsed excitation in a deterministically coupled quantum dot-micropillar system, in a pronounced strong-coupling regime. Using absolute reflectivity measurements we determine the critical intracavity photon number as well as the i...

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Bibliographic Details
Published in:Physical review letters 2012-10, Vol.109 (16), p.166806-166806, Article 166806
Main Authors: Loo, V, Arnold, C, Gazzano, O, Lemaître, A, Sagnes, I, Krebs, O, Voisin, P, Senellart, P, Lanco, L
Format: Article
Language:English
Subjects:
Physics
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Summary:Giant optical nonlinearity is observed under both continuous wave and pulsed excitation in a deterministically coupled quantum dot-micropillar system, in a pronounced strong-coupling regime. Using absolute reflectivity measurements we determine the critical intracavity photon number as well as the input and output coupling efficiencies of the device. Thanks to a near-unity input-coupling efficiency, we demonstrate a record nonlinearity threshold of only 8 incident photons per pulse. The output-coupling efficiency is found to strongly influence this nonlinearity threshold. We show how the fundamental limit of single-photon nonlinearity can be attained in realistic devices, which would provide an effective interaction between two coincident single-photons.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.166806