Non-classical interference in integrated 3D multiports
Thomas Meany, Michael Delanty, Simon Gross, Graham D. Marshall, M. J., Steel, and Michael J. Withford
TL;DR
This paper demonstrates 3D integrated multiports with quantum interference, performing full quantum characterization and showing classical measurements can predict quantum visibilities in multiport devices.
Contribution
It introduces 3D femtosecond laser-fabricated multiports and demonstrates quantum interference with full characterization, advancing integrated quantum photonics.
Findings
Successful demonstration of 3D multiports with quantum interference
Quantum visibilities predicted from classical coupling ratios
Full quantum characterization performed for all port combinations
Abstract
We demonstrate three and four input multiports in a three dimensional glass platform, fabricated using the femtosecond laser direct-write technique. Hong-Ou-Mandel (HOM) interference is observed and a full quantum characterisation is performed, obtaining two photon correlation matrices for all combinations of input and output ports. For the three-port case, the quantum visibilities are accurately predicted solely from measurement of the classical coupling ratios.
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