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Constraints on downconversion in atomically thick films

Marini, Loris; Helt, L. G.; Lu, Yuerui; Eggleton, Benjamin J.; Palomba, Stefano

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Spontaneous parametric downconversion (SPDC) has been predicted in atomically thick crystals, though not yet observed. In this work we uncover physical and experimental constraints of photon-pair generation in such planar nonlinear films with a free-space illumination/collection geometry. We measure the material nonlinear response of monolayer tungsten diselenide via second harmonic generation and subsequently calculate the expected SPDC efficiency from appropriate quantum-classical relations....[Show more]

dc.contributor.authorMarini, Loris
dc.contributor.authorHelt, L. G.
dc.contributor.authorLu, Yuerui
dc.contributor.authorEggleton, Benjamin J.
dc.contributor.authorPalomba, Stefano
dc.date.accessioned2021-04-22T00:38:16Z
dc.identifier.issn0740-3224
dc.identifier.urihttp://hdl.handle.net/1885/230768
dc.description.abstractSpontaneous parametric downconversion (SPDC) has been predicted in atomically thick crystals, though not yet observed. In this work we uncover physical and experimental constraints of photon-pair generation in such planar nonlinear films with a free-space illumination/collection geometry. We measure the material nonlinear response of monolayer tungsten diselenide via second harmonic generation and subsequently calculate the expected SPDC efficiency from appropriate quantum-classical relations. Energy and momentum conservation shape the wavevectors of photon pairs in free-space and allow us to calculate the loss and coincidence-to-accidental ratio in various configurations. This work improves the understanding of the nonlinear quantum optical potential of these crystals, guides their experimental validation, and provides a performance benchmark for these ultrathin materials.
dc.description.sponsorshipSchool of Physics, University of Sydney; Australian Research Council (ARC) (CUDOS CE110001010); ARC Discovery Early Career Researcher Award (DECRA) (DE140100805).
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherOptical Society of America
dc.rights© 2018 Optical Society of America
dc.sourceJournal of the Optical Society of America B
dc.subjectNonlinear optics at surfaces
dc.subjectQuantum optics
dc.subjectNonlinear wave mixing
dc.subjectParametric processes
dc.subjectPhoton statistics
dc.subjectUltrafast nonlinear optics
dc.titleConstraints on downconversion in atomically thick films
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume35
dcterms.dateAccepted2018-01-23
dc.date.issued2018
local.identifier.absfor010207 - Theoretical and Applied Mechanics
local.identifier.absfor020501 - Classical and Physical Optics
local.identifier.absfor090609 - Signal Processing
local.identifier.ariespublicationa383154xPUB9697
local.publisher.urlhttps://www.osapublishing.org/
local.type.statusPublished Version
local.contributor.affiliationMarini, Loris, University of Sydney
local.contributor.affiliationHelt, L. G., Queen's University
local.contributor.affiliationLu, Yuerui, College of Engineering and Computer Science, ANU
local.contributor.affiliationEggleton, Benjamin J., University of Sydney
local.contributor.affiliationPalomba, Stefano, University of Sydney
local.description.embargo2099-12-31
dc.relationhttp://purl.org/au-research/grants/arc/DE140100805
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage672
local.bibliographicCitation.lastpage679
local.identifier.doi10.1364/JOSAB.35.000672
dc.date.updated2020-11-23T11:37:23Z
local.identifier.scopusID2-s2.0-85044996216
CollectionsANU Research Publications

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