Heralded single-photon source utilizing highly nondegenerate, spectrally factorable spontaneous parametric downconversion

Fumihiro Kaneda, Karina Garay-Palmett, Alfred B. U'Ren, Paul G. Kwiat

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report on the generation of an indistinguishable heralded single-photon state, using highly nondegenerate spontaneous parametric downconversion (SPDC). Spectrally factorable photon pairs can be generated by incorporating a broadband pump pulse and a group-velocity matching (GVM) condition in a periodically-poled potassium titanyl phosphate (PPKTP) crystal. The heralding photon is in the near IR, close to the peak detection efficiency of off-the-shelf Si single-photon detectors; meanwhile, the heralded photon is in the telecom L-band where fiber losses are at a minimum. We observe spectral factorability of the SPDC source and consequently high purity (90%) of the produced heralded single photons by several different techniques. Because this source can also realize a high heralding efficiency (> 90%), it would be suitable for time-multiplexing techniques, enabling a pseudo-deterministic single-photon source, a critical resource for optical quantum information and communication technology.

Original languageEnglish
Pages (from-to)10733-10747
Number of pages15
JournalOptics Express
Volume24
Issue number10
DOIs
Publication statusPublished - 2016 May 16
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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