Narrowband and broadband single-photon sources using custom-tapered waveguides

Harrison R. Greenwood, Mohammed F. Saleh

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In this paper, we present a thorough investigation for a spontaneous parametric four-wave mixing process in third-order nonlinear waveguides with various continuous tapering patterns. It has been previously shown that these devices can quasi-phase-match the four-wave mixing process and enhance its conversion efficiency by orders of magnitude. By altering the tapering profile curve we found that these devices can enable single-photon sources with either narrow or broadband spectral widths at on-demand frequencies. Using our model, we were also able to identify the waveguide length at which the single-photon spectral purity is maximized.

Original languageEnglish
Article number023523
JournalPhysical Review A
Issue number2
Early online date25 Aug 2021
Publication statusPublished - Aug 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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