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Direct visualization of phase-matched efficient second harmonic and broadband sum frequency generation in hybrid plasmonic nanostructures

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dc.contributor.author Li, Zhe
dc.contributor.author Corbett, Brian
dc.contributor.author Gocalinska, Agnieszka
dc.contributor.author Pelucchi, Emanuele
dc.contributor.author Chen, Wen
dc.contributor.author Ryan, Kevin M.
dc.contributor.author Khan, Pritam
dc.contributor.author Silien, Christophe
dc.contributor.author Xu, Hongxing
dc.contributor.author Liu, Ning
dc.date.accessioned 2020-11-03T12:23:43Z
dc.date.available 2020-11-03T12:23:43Z
dc.date.issued 2020
dc.identifier.uri http://hdl.handle.net/10344/9396
dc.description peer-reviewed en_US
dc.description.abstract Second harmonic generation and sum frequency generation (SHG and SFG) provide effective means to realize coherent light at desired frequencies when lasing is not easily achievable. They have found applications from sensing to quantum optics and are of particular interest for integrated photonics at communication wavelengths. Decreasing the footprints of nonlinear components while maintaining their high up-conversion efficiency remains a challenge in the miniaturization of integrated photonics. Here we explore lithographically defined AlGaInP nano (micro)structures/ Al2O3/Ag as a versatile platform to achieve efficient SHG/SFG in both waveguide and resonant cavity configurations in both narrow- and broadband infrared (IR) wavelength regimes (1300–1600nm). The effective excitation of highly confined hybrid plasmonic modes at fundamental wavelengths allows efficient SHG/SFG to be achieved in a waveguide of a cross-section of 113nm×250nm, with a mode area on the deep subwavelength scale (λ2/135) at fundamental wavelengths. Remarkably, we demonstrate direct visualization of SHG/SFG phase-matching evolution in the waveguides. This together with mode analysis highlights the origin of the improved SHG/SFG efficiency. We also demonstrate strongly enhanced SFG with a broadband IR source by exploiting multiple coherent SFG processes on 1µm diameter AlGaInP disks/Al2O3/Ag with a conversion efficiency of 14.8%MW−1 which is five times the SHG value using the narrowband IR source. In both configurations, the hybrid plasmonic structures exhibit >1000 enhancement in the nonlinear conversion efficiency compared to their photonic counterparts. Our results manifest the potential of developing suchnanoscale hybrid plasmonic devices for state-of-the-art on-chip nonlinear optics applications. en_US
dc.language.iso eng en_US
dc.publisher Springernature en_US
dc.relation IRCLA/2017/285 en_US
dc.relation.ispartofseries Light Science & Applications;9, 180
dc.subject armonic generation en_US
dc.subject integrated photonics en_US
dc.title Direct visualization of phase-matched efficient second harmonic and broadband sum frequency generation in hybrid plasmonic nanostructures en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1038/s41377-020-00414
dc.contributor.sponsor Wuhan University en_US
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IRC en_US
dc.relation.projectid 17/CDA/4733 en_US
dc.relation.projectid IRCLA/2017/285 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2981647


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