Entangled-Photon Generation in Nano-to-Bulk Crossover Regime

Motoaki Bamba and Hajime Ishihara
Phys. Rev. Lett. 105, 123906 – Published 17 September 2010
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Abstract

We have theoretically investigated the generation of entangled photons from biexcitons in a semiconductor film with a thickness in the nano-to-bulk crossover regime. In contrast with the cases of quantum dots and bulk materials, we can highly control the generated state of entangled photons through the design of a peculiar energy structure of exciton-photon coupled modes in the thickness range between nanometers and micrometers. Owing to the enhancement of the radiative decay rate of excitons (exciton superradiance), the statistical accuracy of generated photons can be increased beyond the trade-off problem with signal intensity. By implementing an optical cavity structure in the strong-coupling regime, the generation efficiency can be enhanced while maintaining the high statistical accuracy.

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  • Received 23 February 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.123906

© 2010 The American Physical Society

Authors & Affiliations

Motoaki Bamba1,* and Hajime Ishihara2

  • 1Department of Materials Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
  • 2Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan

  • *Present address: Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7 et CNRS, Case 7021, Bâtiment Condorcet, 75013 Paris, France. motoaki.bamba@univ-paris-diderot.fr

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Issue

Vol. 105, Iss. 12 — 17 September 2010

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