Tunable, omnidirectional, and nearly perfect resonant absorptions by a graphene-hBN-based hole array metamaterial

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buir.contributor.authorHajian, Hodjat
buir.contributor.authorGhobadi, Amir
buir.contributor.authorBütün, Bayram
buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage16954en_US
dc.citation.issueNumber13en_US
dc.citation.spage16940en_US
dc.citation.volumeNumber26en_US
dc.contributor.authorHajian, Hodjaten_US
dc.contributor.authorGhobadi, Amiren_US
dc.contributor.authorBütün, Bayramen_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2019-02-21T16:07:51Z
dc.date.available2019-02-21T16:07:51Z
dc.date.issued2018en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractIn this paper, we propose an electrically tunable mid-infrared plasmonic-phononic absorber with omnidirectional and polarization insensitive nearly perfect resonant absorption characteristics. The absorber consists of a graphene/hexagonal boron nitride (hBN)/graphene multilayer on top of a gold bottom reflector separated by a dielectric spacer. The graphene/hBN/graphene multilayer is patterned as a hole array in square lattice. We analytically and numerically prove that, due to the support of hybrid plasmon-phonon-polaritons, nearly perfect multi-resonant absorption peaks with high quality factors are obtained both inside and outside of the Reststrahlen band of hBN. As a result of the hybridization of graphene plasmons with the hyperbolic phonon polaritons of hBN, the high quality resonant absorptions of the metamaterial are almost unaffected by decreasing the phenomenological electron relaxation time of graphene. Moreover, the obtained resonances can be effectively tuned in practice due to the continuity of the graphene layers in the hole array metamaterial. These features make the graphene-hBN metamaterial a skeptical design for practical purposes and mid-infrared multi-functional operations such as sensing.
dc.description.provenanceMade available in DSpace on 2019-02-21T16:07:51Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 222869 bytes, checksum: 842af2b9bd649e7f548593affdbafbb3 (MD5) Previous issue date: 2018en
dc.identifier.doi10.1364/OE.26.016940
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/50386
dc.language.isoEnglish
dc.publisherOSA - The Optical Society
dc.relation.isversionofhttps://doi.org/10.1364/OE.26.016940
dc.source.titleOptics Expressen_US
dc.titleTunable, omnidirectional, and nearly perfect resonant absorptions by a graphene-hBN-based hole array metamaterialen_US
dc.typeArticleen_US

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