On-chip photon-pair generation in a silica microtoroidal cavity

YOSUKE HASHIMOTO, AKIHISA GOBAN, YUKI HIRABAYASHI, YUTA KOBAYASHI, TOMOHIRO ARAKI, TAKAO AOKI

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Microcavities with high Q factor and small mode volume have the potential to be efficient and compact sources of photon pairs. Here, we demonstrate on-chip photonpair generation by spontaneous four-wave mixing in a silica microtoroidal cavity and obtain a coincidence-to-accidental ratio of 7.4±0.1 with a pump power of 46 μW. The heralded photons also exhibit antibunching characterized by autocorrelation function values of g(2) c (0) = 0.57±0.03<1. Comparing with a scaling model, the main noise source is found to be spontaneous Raman scattering in the cavity. This work opens a new possible means for realizing integrated nonclassical photon sources based on silica photonic circuits toward scalable quantum technologies.

Original languageEnglish
Pages (from-to)3533-3542
Number of pages10
JournalOptics Express
Volume29
Issue number3
DOIs
Publication statusPublished - 2021 Feb 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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