Engineered optical nonlinearity for quantum light sources

Agata M. Brańczyk, Alessandro Fedrizzi, Thomas M. Stace, Tim C. Ralph, Andrew G. White

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Many applications in optical quantum information processing benefit from careful spectral shaping of single-photon wave-packets. In this paper we tailor the joint spectral wave-function of photons created in parametric downconversion by engineering the nonlinearity profile of a poled crystal. We design a crystal with an approximately Gaussian nonlinearity profile and confirm successful wave-packet shaping by two-photon interference experiments. We numerically show how our method can be applied for attaining one of the currently most important goals of single-photon quantum optics, the creation of pure single photons without spectral correlations. (C) 2010 Optical Society of America

Original languageEnglish
Pages (from-to)55-65
Number of pages11
JournalOptics Express
Volume19
Issue number1
DOIs
Publication statusPublished - 3 Jan 2011

Keywords

  • DOWN-CONVERSION
  • ENTANGLEMENT
  • GENERATION
  • INTERFERENCE
  • PHOTONS
  • STATE
  • FIBER
  • DOWNCONVERSION
  • LIMIT

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