Wedge and gap plasmonic resonances in double nanoholes

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dc.contributor.authorChen, Yuanyuan
dc.contributor.authorKotnala, Abhay
dc.contributor.authorYu, Li
dc.contributor.authorZhang, Jiasen
dc.contributor.authorGordon, Reuven
dc.date.accessioned2016-04-22T22:59:55Z
dc.date.available2016-04-22T22:59:55Z
dc.date.copyright2015en_US
dc.date.issued2015-11-11
dc.description.abstractWe study the plasmonic resonances of double nanoholes (DNHs) in metal films. These apertures exhibit the usual gap-mode Fabry-Pérot resonances, where the zeroth order resonance is determined by the waveguide cut-off and the first order resonance shows sensitivity to the film thickness. An additional wedge resonance is observed, which is sensitive to the curvature of the cusps in the DNHs, analogous to the wedge modes of single wedges. While the gap mode intensity increases dramatically with decreasing gap-width, the wedge mode intensity saturates since its field enhancement arises from the curvature of the metal film, like cylindrical Sommerfeld waves. Experimental transmission spectra agree well with finite-difference time-domain simulations showing these separate resonances. The controlled design of these resonances is critical for applications including optical tweezers, nonlinear conversion, sensing and spectroscopy.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant, the National Natural Science Foundation of China (NSFC) under Grant Nos. 11374041, 61377050, 11574011 and 11574035, the BUPT Excellent Ph.D. Students Foundation under Grant Nos. CX201324 and the Fund of State Key Laboratory of Information Photonics and Optical Communications of Beijing University of Posts and Telecommunications.en_US
dc.identifier.citationChen, Y., Kotnala, A., Yu, L., Zhang, J. & Gordon, R. (2015). Wedge and gap plasmonic resonances in double nanoholes. Optics Express, 23(23), 30227-30236.en_US
dc.identifier.urihttp://dx.doi.org/10.1364/OE.23.030227
dc.identifier.urihttp://hdl.handle.net/1828/7179
dc.language.isoenen_US
dc.publisherOptics Expressen_US
dc.subjectMetal optics
dc.subjectSurface plasmons
dc.subjectSubwavelength structures
dc.subjectnanostructures
dc.subjectOptical properties
dc.subjectResonance
dc.subject.departmentDepartment of Electrical and Computer Engineering
dc.titleWedge and gap plasmonic resonances in double nanoholesen_US
dc.typeArticleen_US

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