Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material

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dc.contributor.authorAlam, M. Zahirulen
dc.contributor.authorSchulz, Sebastian A.en
dc.contributor.authorUpham, Jeremyen
dc.contributor.authorDe Leon, Israelen
dc.contributor.authorBoyd, Robert W.en
dc.contributor.funderConsejo Nacional de Ciencia y Tecnologíaen
dc.contributor.funderCanada Foundation for Innovationen
dc.contributor.funderNatural Sciences and Engineering Research Council of Canadaen
dc.contributor.funderCanada Excellence Research Chairs, Government of Canadaen
dc.date.accessioned2024-06-05T08:32:41Z
dc.date.available2024-06-05T08:32:41Z
dc.date.issued2018-01-26en
dc.description.abstractThe size and operating energy of a nonlinear optical device are fundamentally constrained by the weakness of the nonlinear optical response of common materials. Here, we report that a 50-nm-thick optical metasurface made of optical dipole antennas coupled to an epsilon-near-zero material exhibits a broadband (∼400 nm bandwidth) and ultrafast (recovery time less than 1 ps) intensity-dependent refractive index n2 as large as −3.73 ± 0.56 cm2 GW−1. Furthermore, the metasurface exhibits a maximum optically induced refractive index change of ±2.5 over a spectral range of ∼200 nm. The inclusion of low-Q nanoantennas on an epsilon-near-zero thin film not only allows the design of a metasurface with an unprecedentedly large nonlinear optical response, but also offers the flexibility to tailor the sign of the response. Our technique removes a longstanding obstacle in nonlinear optics: the lack of materials with an ultrafast nonlinear contribution to refractive index on the order of unity. It consequently offers the possibility to design low-power nonlinear nano-optical devices with orders-of-magnitude smaller footprints.en
dc.description.sponsorshipConsejo Nacional de Ciencia y Tecnología (Grant no. 286150)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAlam, M.Z., Schulz, S.A., Upham, J. et al. (2018) 'Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material', Nature Photonics, 12, pp. 79–83. https://doi.org/10.1038/s41566-017-0089-9en
dc.identifier.doi10.1038/s41566-017-0089-9en
dc.identifier.eissn1749-4893en
dc.identifier.endpage83en
dc.identifier.issn1749-4885en
dc.identifier.journaltitleNature Photonicsen
dc.identifier.startpage79en
dc.identifier.urihttps://hdl.handle.net/10468/15986
dc.identifier.volume12en
dc.language.isoenen
dc.publisherSpringer Natureen
dc.rights© 2018, Springer Nature Limited. This is a post-peer-review, pre-copyedit version of an article published in Nature Photonics. The final authenticated version is available online at: https://doi.org/10.1038/s41566-017-0089-9en
dc.subjectLow-power nonlinear nano-optical devicesen
dc.subjectNonlinear optical deviceen
dc.subjectOptical dipole antennas coupled to an epsilon-near-zero materialen
dc.titleLarge optical nonlinearity of nanoantennas coupled to an epsilon-near-zero materialen
dc.typeArticle (peer-reviewed)en
oaire.citation.issue2en
oaire.citation.volume12en
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