One-way absorption of terahertz waves in rod-type and multilayer structures containing polar dielectrics

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage235126-7en_US
dc.citation.issueNumber23en_US
dc.citation.spage235126-1en_US
dc.citation.volumeNumber90en_US
dc.contributor.authorSerebryannikov, A. E.en_US
dc.contributor.authorNojima, S.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2016-02-08T10:34:07Z
dc.date.available2016-02-08T10:34:07Z
dc.date.issued2014en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractOne-way absorption can be obtained at terahertz frequencies in low-profile rod-type and multilayer dielectric structures with broken spatial inversion symmetry, which contain either a rod layer or an ultrathin homogeneous layer made of a polar dielectric. Perfect absorption for one of the two opposite incidence directions and perfect reflection for the other one are observed at the edge of the polaritonic gap in a wide range of the incident angle variation, when the thickness of the entire structure is of the order of the incident wavelength. Moreover, this regime appears in a wide frequency range, in which the forward-to-backward absorption contrast is strong. The exploited mechanism is connected with the parameter adjustment that enables the location of the polaritonic gap of the polar dielectric, of which the lossy part of the structure is made, inside the stop band arising due to the periodicity of the lossless part of the structure that is made of a nondispersive dielectric. It also exploits absorption enhancement in the lossy part by backing it with the highly reflecting lossless part, which has alternating stop and pass bands. © 2014 American Physical Society.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:34:07Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2014en
dc.identifier.doi10.1103/PhysRevB.90.235126en_US
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11693/24769
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.90.235126en_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleOne-way absorption of terahertz waves in rod-type and multilayer structures containing polar dielectricsen_US
dc.typeArticleen_US

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