Two-photon quantum interference in integrated multi-mode interference devices

Kostas Poulios, Daniel Fry, Alberto Politi, Nur Ismail, Kerstin Worhoff, Jeremy L. O'Brien, Mark G. Thompson*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)


Multi-mode interference (MMI) devices fabricated in silicon oxynitride (SiON) with a refractive index contrast of 2.4% provide a highly compact and stable platform for multi-photon non-classical interference. MMI devices can introduce which-path information for photons propagating in the multi-mode section which can result in degradation of this non-classical interference. We theoretically derive the visibility of quantum interference of two photons injected in a MMI device and predict near unity visibility for compact SiON devices. We complement the theoretical results by experimentally demonstrating visibilities of up to 97.7% in 2 x 2 MMI devices without the requirement of narrow-band photons. (C) 2013 Optical Society of America

Original languageEnglish
Pages (from-to)23401-23409
Number of pages9
JournalOptics Express
Issue number20
Publication statusPublished - 7 Oct 2013

Structured keywords

  • QETLabs




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