Non-classical interference in integrated 3D multiports.
Thomas Meany,Michael Delanty,Simon Gross,Graham D. Marshall,Michael J. Steel,Michael J. Withford +5 more
TLDR
In this paper, three and four input multiports in a three dimensional glass platform, fabricated using the femtosecond laser direct-write technique, were demonstrated and a full quantum characterization was performed.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 characterization is performed, obtaining two photon correlation matrices for all combinations of input and output ports. For the 3-port case, the quantum visibilities are accurately predicted solely from measurement of the classical coupling ratios.read more
Citations
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Integrated multimode interferometers with arbitrary designs for photonic boson sampling
Andrea Crespi,Roberto Osellame,Roberta Ramponi,Daniel J. Brod,Ernesto F. Galvão,Nicolò Spagnolo,Chiara Vitelli,Chiara Vitelli,Enrico Maiorino,Paolo Mataloni,Fabio Sciarrino +10 more
TL;DR: In this article, a five-mode integrated interferometer containing three-dimensional S-bent waveguides was used to sample three single photons and the probability ratios of all events were measured.
Journal ArticleDOI
Laser written circuits for quantum photonics
Thomas Meany,Thomas Meany,Markus Gräfe,René Heilmann,Armando Perez-Leija,Simon Gross,Michael J. Steel,Michael J. Withford,Alexander Szameit +8 more
TL;DR: The femtosecond laser direct-writing of waveguide circuits in glasses is among the few integrated optical platforms to have produced individually every component required for scalable quantum computation.
Journal ArticleDOI
Three-photon bosonic coalescence in an integrated tritter.
Nicolò Spagnolo,Chiara Vitelli,Chiara Vitelli,Lorenzo Aparo,Paolo Mataloni,Fabio Sciarrino,Andrea Crespi,Andrea Crespi,Roberta Ramponi,Roberta Ramponi,Roberto Osellame,Roberto Osellame +11 more
TL;DR: The experimental observation of three-photon interference in an integrated three-port directional coupler realized by ultrafast laser writing is reported, which allows for bosonic coalescence of three photons and opens new important perspectives in many areas of quantum information.
Journal ArticleDOI
Multiphoton quantum interference in a multiport integrated photonic device
Benjamin J. Metcalf,Nicholas Thomas-Peter,Justin B. Spring,Dmytro Kundys,Matthew A. Broome,Peter C. Humphreys,Xian-Min Jin,Xian-Min Jin,Marco Barbieri,W. Steven Kolthammer,James C. Gates,Brian J. Smith,Nathan K. Langford,Pete Smith,Ian A. Walmsley +14 more
TL;DR: This work demonstrates three-photon quantum operation of an integrated device containing three coupled interferometers, eight spatial modes and many classical and nonclassical interferences, and introduces a new scheme to verify quantum behaviour, using classically characterised device elements and hierarchies of photon correlation functions.
Journal ArticleDOI
Ultrafast-laser-inscribed 3D integrated photonics: challenges and emerging applications
Simon Gross,Michael J. Withford +1 more
TL;DR: In this paper, the basic techniques and technological challenges of 3D integrated photonics fabricated using ultrafast laser inscription are reviewed as well as the most recent progress in the fields of astrophotonics, optical communication, quantum photonics, emulation of quantum systems, optofluidics and sensing.
References
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Silica-on-Silicon Waveguide Quantum Circuits
TL;DR: These results show that it is possible to directly “write” sophisticated photonic quantum circuits onto a silicon chip, which will be of benefit to future quantum technologies based on photons, including information processing, communication, metrology, and lithography, as well as the fundamental science of quantum optics.