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dc.contributor.authorAyas S.en_US
dc.contributor.authorBakan, G.en_US
dc.contributor.authorDana, A.en_US
dc.date.accessioned2016-02-08T09:54:18Z
dc.date.available2016-02-08T09:54:18Z
dc.date.issued2015en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/22014
dc.description.abstractMultispectral metamaterial absorbers based on metal-insulatormetal nano-square patch resonators are studied here. For a geometry consisting of perfectly nano-square patches and vertical sidewalls, double resonances in the visible regime are observed due to simultaneous excitation of electric and magnetic plasmon modes. Although slightly modifying the sizes of the square patches makes the resonance wavelengths simply shift, rounding corners of the square patches results in emergence of a third resonance due to excitation of the circular cavity modes. Sidewall angle of the patches are also observed to affect the absorption spectra significantly. Peak absorption values for the triple resonance structures are strongly affected as the sidewall angle varies from 90 to 50 degrees. Rounded corners and slanted sidewalls are typical imperfections for lithographically fabricated metamaterial structures. The presented results suggest that imperfections caused during fabrication of the top nanostructures must be taken into account when designing metamaterial absorbers. Furthermore, it is shown that these fabrication imperfections can be exploited for improving resonance properties and bandwidths of metamaterials for various potential applications such as solar energy harvesting, thermal emitters, surface enhanced spectroscopies and photodetection. © 2015 Optical Society of America.en_US
dc.language.isoEnglishen_US
dc.source.titleOptics Expressen_US
dc.relation.isversionofhttps://doi.org/10.1364/OE.23.011763en_US
dc.subjectElectric excitationen_US
dc.subjectEnergy harvestingen_US
dc.subjectFabricationen_US
dc.subjectPlasmonsen_US
dc.subjectResonanceen_US
dc.subjectSolar energyen_US
dc.subjectDouble resonanceen_US
dc.subjectFabrication imperfectionsen_US
dc.subjectMagnetic plasmonsen_US
dc.subjectMetamaterial absorbersen_US
dc.subjectMetamaterial structuresen_US
dc.subjectPlasmonic metamaterialsen_US
dc.subjectResonance wavelengthsen_US
dc.subjectSurface enhanced spectroscopyen_US
dc.subjectMetamaterialsen_US
dc.titleRounding corners of nano-square patches for multispectral plasmonic metamaterial absorbersen_US
dc.typeArticleen_US
dc.departmentInstitute of Materials Science and Nanotechnology - UNAMen_US
dc.citation.spage11763en_US
dc.citation.epage11770en_US
dc.citation.volumeNumber23en_US
dc.citation.issueNumber9en_US
dc.identifier.doi10.1364/OE.23.011763en_US
dc.publisherOSA - The Optical Societyen_US


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