Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/7747
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dc.contributor.authorRezaei, Behrooz-
dc.contributor.authorGiden, İbrahim Haiii-
dc.contributor.authorZakerhamidi, Mohammad Sadegh-
dc.contributor.authorRanjkesh, Amid-
dc.contributor.authorYoon, Tae-Hoon-
dc.date.accessioned2021-09-11T15:59:25Z-
dc.date.available2021-09-11T15:59:25Z-
dc.date.issued2020en_US
dc.identifier.issn0932-0784-
dc.identifier.issn1865-7109-
dc.identifier.urihttps://doi.org/10.1515/zna-2019-0144-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/7747-
dc.description.abstractWe proposed a new method for designing graded index lens using liquid crystal infiltration into annular photonic crystals. Applying an external nonuniform voltage in the transverse direction perpendicular to the direction of light propagation yields different orientation of liquid crystal molecules inside the photonic crystal unit cells. As a result, a gradient refractive index was modulated. We numerically investigate focusing properties of the designed graded index structure using plane-wave expansion and finite-difference time-domain methods. The gradient refractive index profile was adjusted by varying the nonuniform voltage excitations, which consequently altered the focal distance of the graded index structure. A wide tuning range of 1856 nm was achieved for focal distance by the proposed graded index structure. This feature can be implemented for planning a flat lens with tunable focal distance based on electro-optic effect. These achievements may have future applications in some optical devices such as near-field imaging and scanning.en_US
dc.language.isoenen_US
dc.publisherWalter De Gruyter Gmbhen_US
dc.relation.ispartofZeitschrift Fur Naturforschung Section A-A Journal of Physical Sciencesen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFocal Distance Tuningen_US
dc.subjectGraded Index Opticsen_US
dc.subjectLiquid Crystalen_US
dc.subjectOptical Beam Focusingen_US
dc.subjectPhotonic Crystalen_US
dc.titleTwo-Dimensional Hybrid Photonic Crystal With Graded Low-Index Using a Nonuniform Voltageen_US
dc.typeArticleen_US
dc.departmentFaculties, Faculty of Engineering, Department of Electrical and Electronics Engineeringen_US
dc.departmentFakülteler, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümütr_TR
dc.identifier.volume75en_US
dc.identifier.issue1en_US
dc.identifier.startpage65en_US
dc.identifier.endpage71en_US
dc.authorid0000-0002-4411-5606-
dc.identifier.wosWOS:000504421300007en_US
dc.identifier.scopus2-s2.0-85078137528en_US
dc.institutionauthorGiden, İbrahim Halil-
dc.identifier.doi10.1515/zna-2019-0144-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ3-
item.openairetypeArticle-
item.languageiso639-1en-
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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