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Full utilization of semi-Dirac cones in photonics

Show simple item record Kurt, Hamza Yasa, Utku G. Turduev, Mirbek Giden, İbrahim Halil 2019-03-20T18:38:48Z 2019-03-20T18:38:48Z 2018-05-16
dc.identifier.citation Yasa, U. G., Turduev, M., Giden, I. H., & Kurt, H. (2018). Full utilization of semi-dirac cones in photonics. Physical Review B, 97(19) doi:10.1103/PhysRevB.97.195131 en_US
dc.identifier.issn 24699950
dc.description.abstract In this study, realization and applications of anisotropic zero-refractive-index materials are proposed by exposing the unit cells of photonic crystals that exhibit Dirac-like cone dispersion to rotational symmetry reduction. Accidental degeneracy of two Bloch modes in the Brillouin zone center of two-dimensional C2-symmetric photonic crystals gives rise to the semi-Dirac cone dispersion. The proposed C2-symmetric photonic crystals behave as epsilon-and-mu-near-zero materials (eff≈0, μeff≈0) along one propagation direction, but behave as epsilon-near-zero material (eff≈0, μeff≠0) for the perpendicular direction at semi-Dirac frequency. By extracting the effective medium parameters of the proposed C4- and C2-symmetric periodic media that exhibit Dirac-like and semi-Dirac cone dispersions, intrinsic differences between isotropic and anisotropic materials are investigated. Furthermore, advantages of utilizing semi-Dirac cone materials instead of Dirac-like cone materials in photonic applications are demonstrated in both frequency and time domains. By using anisotropic transmission behavior of the semi-Dirac materials, photonic application concepts such as beam deflectors, beam splitters, and light focusing are proposed. Furthermore, to the best of our knowledge, semi-Dirac cone dispersion is also experimentally demonstrated for the first time by including negative, zero, and positive refraction states of the given material. © 2018 American Physical Society. en_US
dc.language.iso eng en_US
dc.publisher American Physical Society en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.subject Negative Refraction en_US
dc.subject Crystals en_US
dc.subject Metamaterial en_US
dc.subject Realization en_US
dc.subject Emission en_US
dc.subject Point en_US
dc.subject Zero-refractive-index en_US
dc.title Full utilization of semi-Dirac cones in photonics en_US
dc.type article en_US
dc.relation.journal Physical Review B en_US
dc.contributor.department TOBB ETU, Faculty of Engineering, Department of Electrical & Electronics Engineering en_US
dc.identifier.volume 97 en_US
dc.identifier.issue 19 en_US
dc.identifier.startpage 195131-1 en_US
dc.identifier.endpage 195131-11 en_US
dc.relation.tubitak 115R036
dc.identifier.wos WOS:000433007600002
dc.identifier.scopus 2-s2.0-85047214319
dc.contributor.tobbetuauthor Kurt, Hamza
dc.contributor.YOKid 200103
dc.identifier.doi 10.1103/PhysRevB.97.195131
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı

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