Characteristic attributes of multiple cascaded terahertz metasurfaces with magnetically tunable subwavelength resonators

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage1700252-15en_US
dc.citation.issueNumber3en_US
dc.citation.spage1700252-1en_US
dc.citation.volumeNumber530en_US
dc.contributor.authorSerebryannikov, A. E.en_US
dc.contributor.authorLakhtakia, A.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2019-02-21T16:05:35Z
dc.date.available2019-02-21T16:05:35Z
dc.date.issued2018en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Physics
dc.departmentDepartment of Electrical and Electronics Engineering
dc.departmentInstitute of Materials Science and Nanotechnology(UNAM)
dc.description.abstractThe characteristics of multiple cascaded metasurfaces comprising H-shaped, magnetostatically controllable, subwavelength terahertz (THz) resonators made of InAs were systematically investigated, using a commercial solver based on the finite-integration method, for the design of tunable filters. Three configurations of the biasing magnetostatic field were compared with each other as well as with the bias-free configuration for filtering of normally incident linearly polarized plane waves. A close study of only one metasurface was found sufficient to broadly determine the sensitivity to the direction of the magnetostatic field and the bandwidth of a stopband. Furthermore, the effects of metasurface geometry and biasing field can be considered separately for initial design purposes. All features in the transmittance spectra for the bias-free configuration that are related to the number of cascaded metasurfaces are also observed when the biasing magnetostatic field is applied. The coupling of adjacent metasurfaces in a cascade is strongly affected by the relative permittivity and the thickness of the spacer between the two metasurfaces. The spectral locations of stopbands scale with respect to the spacer's relative permittivity, the scaling rule being different from a classical one. The stopbands are redshifted when the spacer thickness is increased, with the redshift dependent on the polarization of the incident plane wave. Inter-metasurface coupling and inter-resonator coupling on the same metasurface affect the spectral location of a stopband in opposite ways. On-off type switching can be obtained by changing the orientation of magnetostatic field. The elucidated characteristics are expected to be important for not only filters but also other tunable THz devices.
dc.description.sponsorshipAES has been supported by National Science Centre (NCN), Poland under the project MetaSel (DEC-2015/17/B/ST3/00118). AL thanks the Charles Godfrey Binder Endowment at the Pennsylvania State University for ongoing support of his research activities. Contribution of EO has been supported by DPT (HAMIT), TUBITAK (113E331, 114E374, 115F560), and Turkish Academy of Sciences.
dc.embargo.release2019-03-25en_US
dc.identifier.doi10.1002/andp.201700252
dc.identifier.issn0003-3804
dc.identifier.urihttp://hdl.handle.net/11693/50261
dc.language.isoEnglish
dc.publisherWiley-VCH Verlag
dc.relation.isversionofhttps://doi.org/10.1002/andp.201700252
dc.relation.projectDevlet Planlama Örgütü, DPT - DEC-2015/17/B/ST3/00118 - Türkiye Bilimler Akademisi, TÜBA - Pennsylvania State University, PSU - 113E331 - 114E374 - 115F560 - AES Corporation, AES
dc.source.titleAnnalen der Physiken_US
dc.subjectMagnetostatic controlen_US
dc.subjectMetasurface cascadeen_US
dc.subjectTerahertz filteren_US
dc.subjectTunable metasurfaceen_US
dc.titleCharacteristic attributes of multiple cascaded terahertz metasurfaces with magnetically tunable subwavelength resonatorsen_US
dc.typeArticleen_US

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