One-way and near-absolute polarization insensitive near-perfect absorption by using an all-dielectric metasurface

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buir.contributor.authorYıldırım, Deniz Umut
buir.contributor.authorGhobadi, Amir
buir.contributor.authorSoydan, Mahmut Can
buir.contributor.authorSerebryannikov, Andriy E.
buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage2013en_US
dc.citation.issueNumber7en_US
dc.citation.spage2010en_US
dc.citation.volumeNumber45en_US
dc.contributor.authorYıldırım, Deniz Umut
dc.contributor.authorGhobadi, Amir
dc.contributor.authorSoydan, Mahmut Can
dc.contributor.authorSerebryannikov, Andriy E.
dc.contributor.authorÖzbay, Ekmel
dc.date.accessioned2021-03-04T04:59:44Z
dc.date.available2021-03-04T04:59:44Z
dc.date.issued2020
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractIn this Letter, we numerically propose the one-way perfect absorption of near-infrared radiation in a tunable spectral range with high transmission in the neighboring spectral ranges. This functionality is obtained by using a two-dimensional, guided-mode resonance-based grating-waveguide metasurface that acts as a frequency-selective reflector, a spacer dielectric, and an absorbing oxide layer. Within the bandwidth of the excited guided-mode resonance excited at 1.82 µm (with a full-width at half-maximum of 19 nm), we confirmed perfect absorption when light was incident from one of the two opposite directions, whereas in the other direction, perfect reflection was observed. The forward-to-backward absorption ratio reached as high as 60, while the thickness of the entire structure was on the order of the operating wavelength. In addition to the spectral tunability of the excited resonances and their bandwidths, our proposed device supports transparency windows with 65% transmission in the adjacent frequency bands. Our 2D grating is also verified to enable near-absolute insensitivity to the polarization state of incident light. Geometrical parameter modification also gives our design great tunability, as we also designed a device with a 300 nm absorption/reflection linewidth.en_US
dc.description.provenanceSubmitted by Zeynep Aykut (zeynepay@bilkent.edu.tr) on 2021-03-04T04:59:44Z No. of bitstreams: 1 One_way_and_near_absolute_polarization_insensitive_near_perfect_absorption_by_using_an_all_dielectric_metasurface.pdf: 885927 bytes, checksum: eb69d58062ea7b59c25eebe5670df66a (MD5)en
dc.description.provenanceMade available in DSpace on 2021-03-04T04:59:44Z (GMT). No. of bitstreams: 1 One_way_and_near_absolute_polarization_insensitive_near_perfect_absorption_by_using_an_all_dielectric_metasurface.pdf: 885927 bytes, checksum: eb69d58062ea7b59c25eebe5670df66a (MD5) Previous issue date: 2020en
dc.identifier.doi10.1364/OL.387350en_US
dc.identifier.issn0146-9592
dc.identifier.urihttp://hdl.handle.net/11693/75741
dc.language.isoEnglishen_US
dc.publisherOSA - The Optical Societyen_US
dc.relation.isversionofhttps://dx.doi.org/10.1364/OL.387350en_US
dc.source.titleOptics Lettersen_US
dc.titleOne-way and near-absolute polarization insensitive near-perfect absorption by using an all-dielectric metasurfaceen_US
dc.typeArticleen_US

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