Toroidal Dipole-Enhanced Third Harmonic Generation of Deep Ultraviolet Light Using Plasmonic Meta-atoms

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dc.citation.firstpage605en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleNano Lettersen_US
dc.citation.lastpage611en_US
dc.citation.volumeNumber19en_US
dc.contributor.authorAhmadivand, Arashen_US
dc.contributor.authorSemmlinger, Michaelen_US
dc.contributor.authorDong, Liangliangen_US
dc.contributor.authorGerislioglu, Buraken_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorHalas, Naomi J.en_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.abstractThe harmonic generation of light with plasmonic and all-dielectric nanostructures has gained much recent interest. This approach is especially promising for short wavelength (i.e., ultraviolet (UV)) generation, where conventional nonlinear crystals reach their limits both in transparency and in their ability to achieve phase-matching between the input and output fields. Here, we demonstrate that the third harmonic generation of deep UV light in an indium tin oxide (ITO) film can be substantially enhanced by a metasurface consisting of metallic toroidal meta-atoms covered with an alumina layer for protection against laser-induced damage. This approach combines the benefits of the large nonlinear susceptibility of ITO with the unique field enhancement properties of a toroidal metasurface. This ITO–meta-atom combination produces a third harmonic signal at a wavelength of 262 nm that is nominally five times larger than that of an ITO film patterned with a conventional hotspot-enhanced plasmonic dimer array. This result demonstrates the potential for toroidal meta-atoms as the active engineered element in a new generation of enhanced nonlinear optical materials and devices.en_US
dc.identifier.citationAhmadivand, Arash, Semmlinger, Michael, Dong, Liangliang, et al.. "Toroidal Dipole-Enhanced Third Harmonic Generation of Deep Ultraviolet Light Using Plasmonic Meta-atoms." <i>Nano Letters,</i> 19, no. 1 (2019) American Chemical Society: 605-611. https://doi.org/10.1021/acs.nanolett.8b04798.en_US
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.8b04798en_US
dc.identifier.urihttps://hdl.handle.net/1911/106259en_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.keywordThird harmonic generationen_US
dc.subject.keyworddeep-ultraviolet lighten_US
dc.subject.keywordindium tin oxideen_US
dc.subject.keywordmetamaterialen_US
dc.subject.keywordtoroidal resonanceen_US
dc.titleToroidal Dipole-Enhanced Third Harmonic Generation of Deep Ultraviolet Light Using Plasmonic Meta-atomsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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