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dc.contributor.authorSerebryannikov, A. E.en_US
dc.contributor.authorAlıcı, K. B.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.contributor.authorLakhtakia, A.en_US
dc.date.accessioned2019-02-21T16:07:48Z
dc.date.available2019-02-21T16:07:48Z
dc.date.issued2018en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/50383
dc.description.abstractTemperature-sensitive scattering of terahertz (THz) waves by infinitely long, cylindrical core-shell structures was theoretically studied. Each structure is a dielectric cylinder coated with an InSb shell illuminated by either a transverse-electric (TE) or a transverse-magnetic (TM) plane wave. InSb is a thermally tunable semiconductor showing a transition from dielectric to plasmonic state at THz frequencies. Accordingly, the total scattering efficiency (TSE) can be thermally tuned for both polarization states of the incident plane wave. The spectral locations of the maxima and minima of the TSE of an InSb-coated cylinder can be exploited for cloaking the core. At least three scenarios lead to the strong suppression of scattering by a single core-shell structure in different spectral regimes when the temperature is fixed. The excitation of localized surface-plasmon resonances is the feature being common for two of them, while the effect of volumetric resonance dominates in the third scenario. Regimes that are either highly or weakly sensitive to the core material were identified. Weak sensitivity enables masking, i.e., the core material cannot be identified by a far-zone observer. The TSE minima are usually significantly sensitive to the polarization state, but ones with weak sensitivity to the polarization state also exist.
dc.language.isoEnglish
dc.source.titleOptics Expressen_US
dc.relation.isversionofhttps://doi.org/10.1364/OE.26.000001
dc.titleThermally sensitive scattering of terahertz waves by coated cylinders for tunable invisibility and maskingen_US
dc.typeArticleen_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage1en_US
dc.citation.epage14en_US
dc.citation.volumeNumber26en_US
dc.citation.issueNumber1en_US
dc.identifier.doi10.1364/OE.26.000001
dc.publisherOSA - The Optical Society
dc.contributor.bilkentauthorÖzbay, Ekmel


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