Abstract
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 2×2 MMI devices without the requirement of narrow-band photons.
Original language | English |
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Pages (from-to) | 23401-23409 |
Number of pages | 9 |
Journal | Optics Express |
Volume | 21 |
Issue number | 20 |
DOIs | |
Publication status | Published - 7 Oct 2013 |
Externally published | Yes |