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Title: Influence of the Purcell effect on the purity of bright single photon sources

Purcell effect is a powerful tool to efficiently collect single photons emitted by semiconductor quantum dots. However, it is common to observe a degraded single photon purity when a quantum dot is inserted in an optical microcavity. Here, we investigate the role of the cavity coupling on the single photon purity for a quantum dot deterministically coupled to a pillar cavity mode. We show that the degradation of the purity cannot be attributed to cavity feeding effects but is fully explained by recapture processes. A good single photon purity is therefore easily restored using an intra-dot excitation scheme.
Authors:
; ; ; ; ; ; ;  [1]
  1. Laboratoire de Photonique et de Nanostructures, CNRS, UPR20, Route de Nozay, 91460 Marcoussis (France)
Publication Date:
OSTI Identifier:
22122821
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 3; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COUPLING; EMISSION; EXCITATION; IMPURITIES; LIGHT SOURCES; OPTICS; PHOTONS; QUANTUM DOTS; SEMICONDUCTOR MATERIALS