Crossed chiral band approximation for wide-band self-collimation of light

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buir.contributor.authorAkçaalan, Önder
dc.citation.issueNumber23en_US
dc.citation.volumeNumber53en_US
dc.contributor.authorGümüş, M. A.
dc.contributor.authorAkçaalan, Önder
dc.contributor.authorKurt, H.
dc.date.accessioned2021-02-12T11:24:14Z
dc.date.available2021-02-12T11:24:14Z
dc.date.issued2020
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe propose a perspective to the evaluation of the wide bandwidth phenomenon for low-symmetric photonic structures, by introducing the band tailoring and chiral band approximation on the self-collimation effect. In the case of the crossing of the bands, we claim the excitation of the lower mode can provide the utilization of the entire bandwidth by suppressing the intersection regions where the frequencies tend to mix. Thereby, we design broadband self-collimation capable, defect-free photonic structures and examine their performances. A fractional bandwidth of 0.35 (a/λ = 0.429 − 0.607) and 0.37 (a/λ = 0.481 − 0.701) are achieved for radii of r = 0.25a and r = 0.23a, respectively. We explore the full-range collimation by using transmission and E-field intensity analyses in addition to band diagrams and group velocity dispersions. Moreover, we indicate all-angle collimation validity even for highly tilted sources up to an angle of 80◦ .en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2021-02-12T11:24:14Z No. of bitstreams: 1 Crossed chiral band approximation for.pdf: 1091693 bytes, checksum: 927f1449feb580e9646696c99337cd11 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-12T11:24:14Z (GMT). No. of bitstreams: 1 Crossed chiral band approximation for.pdf: 1091693 bytes, checksum: 927f1449feb580e9646696c99337cd11 (MD5) Previous issue date: 2020en
dc.description.sponsorshipThe authors M A Gumus and H Kurt acknowledge funding of the Scientific and Technological Research Council of Turkey (TUBITAK) with Project No. 115R036. H Kurt also acknowledges the partial support of the Turkish Academy of Sciences (TUBA).en_US
dc.identifier.doi10.1088/1361-6463/ab7e63en_US
dc.identifier.issn0022-3727
dc.identifier.urihttp://hdl.handle.net/11693/55113
dc.language.isoEnglishen_US
dc.publisherInstitute of Physics Publishingen_US
dc.relation.isversionofhttps://dx.doi.org/10.1088/1361-6463/ab7e63en_US
dc.source.titleJournal of Physics D: Applied Physicsen_US
dc.subjectSelf-collimationen_US
dc.subjectDispersionen_US
dc.subjectPhotonic-crystalsen_US
dc.titleCrossed chiral band approximation for wide-band self-collimation of lighten_US
dc.typeArticleen_US

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