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Spatial modes in waveguided parametric down-conversion

Source: Phys. Rev. A 80, 033829 (2009); doi:10.1103/PhysRevA.80.033829

Published 18 September 2009

KEYWORDS and PACS
Keywords
PACS
  • 42.65.Tg
    Optical solitons; nonlinear guided waves
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 42.50.Ex
    Optical implementations of quantum information processing and transfer
  • YEAR: 2009
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PUBLICATION DATA
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Andreas Christ, Kaisa Laiho, Andreas Eckstein, Thomas Lauckner, Peter J. Mosley, and Christine Silberhorn
Max Planck Institute for the Science of Light, Günther-Scharowsky-Str. 1/Building 24, 91058 Erlangen, Germany
The propagation of several spatial modes has a significant impact on the structure of the emission from parametric down-conversion in a nonlinear waveguide. This manifests itself not only in the spatial correlations of the photon pairs but also, due to new phase-matching conditions, in the output spectrum, radically altering the degree of entanglement within each pair. Here we investigate both theoretically and experimentally the results of higher-order spatial-mode propagation in nonlinear waveguides. We derive conditions for the creation of pairs in these modes and present observations of higher-order mode propagation in both the spatial and spectral domains. Furthermore, we observe correlations between the different degrees of freedom and finally we discuss strategies for mitigating any detrimental effects and optimizing pair production in the fundamental mode. ©2009 The American Physical Society
History: Received 29 April 2009; published 18 September 2009
Permalink: http://link.aps.org/abstract/PRA/v80/e033829

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