%0 Journal Article
%T Multimode quantum interference of photons in multiport integrated devices
%A Peruzzo, Alberto
%A Laing, Anthony
%A Politi, Alberto
%A Rudolph, Terry
%A O'Brien, Jeremy L.
%J Nature Communications
%D 2011
%V 2
%N 224
%F Peruzzo_etal2011
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=763), last updated on Sun, 06 May 2012 16:43:51 -0500
%X Photonics is a leading approach in realizing future quantum technologies and recently, optical waveguide circuits on silicon chips have demonstrated high levels of miniaturization and performance. Multimode interference (MMI) devices promise a straightforward implementation of compact and robust multiport circuits. Here, we show quantum interference in a 2×2 MMI coupler with visibility of V=95.6+/-0.9%. We further demonstrate the operation of a 4×4 port MMI device with photon pairs, which exhibits complex quantum interference behaviour. We have developed a new technique to fully characterize such multiport devices, which removes the need for phase-sensitive measurements and may find applications for a wide range of photonic devices. Our results show that MMI devices can operate in the quantum regime with high fidelity and promise substantial simplification and concatenation of photonic quantum circuits.
%K fromIPMRAS
%P 6