Heralded generation of ultrafast single photons in pure quantum states

Peter James Mosley, Jeff S Lundeen, Brian J Smith, Piotr Wasylczyk, Alfred B U’Ren, Christine Silberhorn, Ian A Walmsley

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411 Citations (Scopus)

Abstract

We present an experimental demonstration of heralded single photons prepared in pure quantum states from a parametric down-conversion source. It is shown that, through controlling the modal structure of the photon pair emission, one can generate pairs in factorable states and thence eliminate the need for spectral filters in multiple-source interference schemes. Indistinguishable heralded photons were generated in two independent spectrally engineered sources and Hong-Ou-Mandel interference observed between them without spectral filters. The measured visibility of 94.4% sets a minimum bound on the mean photon purity.
Original languageEnglish
Article number133601
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number13
Early online date2 Apr 2008
DOIs
Publication statusPublished - 4 Apr 2008

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    Mosley, P. J., Lundeen, J. S., Smith, B. J., Wasylczyk, P., U’Ren, A. B., Silberhorn, C., & Walmsley, I. A. (2008). Heralded generation of ultrafast single photons in pure quantum states. Physical Review Letters, 100(13), [133601]. https://doi.org/10.1103/PhysRevLett.100.133601