Efficient Second Harmonic Generation in a Hybrid Plasmonic Waveguide by Mode Interactions

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dc.citation.firstpage3838en_US
dc.citation.issueNumber6en_US
dc.citation.journalTitleNano Lettersen_US
dc.citation.lastpage3845en_US
dc.citation.volumeNumber19en_US
dc.contributor.authorShi, Junjunen_US
dc.contributor.authorLi, Yangen_US
dc.contributor.authorKang, Mengen_US
dc.contributor.authorHe, Xiaoboen_US
dc.contributor.authorHalas, Naomi J.en_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorZhang, Shunpingen_US
dc.contributor.authorXu, Hongxingen_US
dc.contributor.orgLaboratory for Nanophotonicsen_US
dc.date.accessioned2019-08-16T14:47:27Zen_US
dc.date.available2019-08-16T14:47:27Zen_US
dc.date.issued2019en_US
dc.description.abstractDeveloping highly efficient nanoscale coherent light sources is essential for advances in technological applications such as integrated photonic circuits, bioimaging, and sensing. An on-chip wavelength convertor based on second harmonic generation (SHG) would be a crucial step toward this goal, but the light-conversion efficiency would be low for small device dimensions. Here we demonstrate strongly enhanced SHG with a high conversion efficiency of 4 × 10–5 W–1 from a hybrid plasmonic waveguide consisting of a CdSe nanowire coupled with a Au film. The strong spatial overlap of the waveguide mode with the nonlinear material and momentum conservation between the incident and reflected modes are the key factors resulting in such high efficiency. The SHG emission angles vary linearly with excitation wavelength, indicating a nonlinear steering of coherent light emission at the subwavelength scale. Our work is promising for the realization of efficient and tunable nonlinear coherent sources and opens new approaches for efficient integrated nonlinear nanophotonic devices.en_US
dc.identifier.citationShi, Junjun, Li, Yang, Kang, Meng, et al.. "Efficient Second Harmonic Generation in a Hybrid Plasmonic Waveguide by Mode Interactions." <i>Nano Letters,</i> 19, no. 6 (2019) American Chemical Society: 3838-3845. https://doi.org/10.1021/acs.nanolett.9b01004.en_US
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.9b01004en_US
dc.identifier.urihttps://hdl.handle.net/1911/106257en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordhybrid waveguideen_US
dc.subject.keywordmomentum conservationen_US
dc.subject.keywordsecond harmonic generationen_US
dc.subject.keywordsemiconductor nanowireen_US
dc.subject.keywordsurface plasmon polaritonen_US
dc.titleEfficient Second Harmonic Generation in a Hybrid Plasmonic Waveguide by Mode Interactionsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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