Multiple slow waves and relevant transverse transmission and confinement in chirped photonic crystals

buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage21819en_US
dc.citation.issueNumber18en_US
dc.citation.spage21806en_US
dc.citation.volumeNumber22en_US
dc.contributor.authorSerebryannikov, A. E.en_US
dc.contributor.authorCakmak, A. O.en_US
dc.contributor.authorColak, E.en_US
dc.contributor.authorCaglayan, H.en_US
dc.contributor.authorKurt, H.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2015-07-28T12:01:33Z
dc.date.available2015-07-28T12:01:33Z
dc.date.issued2014-09-02en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractThe dispersion properties of rod-type chirped photonic crystals (PhCs) and non-channeled transmission in the direction of the variation of structural parameters from one cell of such a PhC to another are studied. Two types of configurations that enable multiple slow waves but differ in the utilized chirping scheme are compared. It is demonstrated that the multiple, nearly flat bands with a group index of refraction exceeding 180 can be obtained. For these bands, transmission is characterized by multiple narrow peaks of perfect transmission, strong field enhancement inside the slab, and large values of the Q-factor. Among the bands, there are some that show negative phase velocity. Symmetry with respect to the slab mid-plane must be kept in order to obtain constructive interferences that are necessary for reflection-free transmission. It is shown that 15 and more slow wave bands can be obtained in one configuration. The corresponding transmission peaks are well separated from each other, being the only significant feature of the transmission spectrum, while the Q-factor can exceed 105. The observed features are preserved in a wide range of the incidence angle variation. They can be used for tuning the locations and spectral widths of the transmission peaks. Some comparisons with the chirped multilayer structures have been carried out. ©2014 Optical Society of America.en_US
dc.identifier.doi10.1364/OE.22.021806en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/12449
dc.language.isoEnglishen_US
dc.publisherOSA Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/OE.22.021806en_US
dc.source.titleOptics Expressen_US
dc.subjectChirped Photonic Crystalsen_US
dc.subjectSlow Waveen_US
dc.titleMultiple slow waves and relevant transverse transmission and confinement in chirped photonic crystalsen_US
dc.typeArticleen_US

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