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A quantum dot based bright source of entangled photon pairs operating at 53 K

Source: Appl. Phys. Lett. 97, 081104 (2010); doi:10.1063/1.3475487

Published 23 August 2010

KEYWORDS and PACS
Keywords
PACS
  • 42.72.-g
    Optical sources and standards
  • 42.79.Bh
    Optical lenses, prisms and mirrors
  • 42.79.Dj
    Gratings
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
A. Dousse,1 J. Suffczyński,1,2 O. Krebs,1 A. Beveratos,1 A. Lemaître,1 I. Sagnes, J. Bloch,1 P. Voisin,1 and P. Senellart1
1Laboratoire de Photonique et Nanostructures, LPN/CNRS, Route de Nozay, 91460 Marcoussis, France
2Institute of Experimental Physics, University of Warsaw, 69 Hoza Street, 00-681 Warsaw, Poland
The exciton and biexciton lines of a single quantum dot are deterministically coupled to the optical modes of a photonic molecule. The resonance between the quantum dot emission lines and the molecule cavity modes is reached at 53 K. The device operates as a very bright source of entangled photon pairs, with an extraction efficiency of 40% for each photon of the pair. Our measurements show that the use of Purcell effect allows to quench the exciton spin relaxation during the radiative cascade, at 53 K and at high excitation power. ©2010 American Institute of Physics
History: Received 8 July 2010; accepted 14 July 2010; published 23 August 2010
Permalink: http://link.aip.org/link/?APPLAB/97/081104/1

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