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

Research output: Contribution to journalArticlepeer-review

527 Citations (SciVal)


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
Issue number13
Early online date2 Apr 2008
Publication statusPublished - 4 Apr 2008


Dive into the research topics of 'Heralded generation of ultrafast single photons in pure quantum states'. Together they form a unique fingerprint.

Cite this