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Opt Express. 2011 Jan 3;19(1):55-65. doi: 10.1364/OE.19.000055.

Engineered optical nonlinearity for quantum light sources.

Author information

1
Center for Quantum Computer Technology, Department of Physics, The University of Queensland, QLD, Australia.

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 designed a crystal with an approximately Gaussian nonlinearity profile and confirmed 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.

PMID:
21263542
DOI:
10.1364/OE.19.000055

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