Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1347
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dc.contributor.authorTurduev, Mirbek-
dc.contributor.authorHayran, Z.-
dc.contributor.author Kurt, Hamza-
dc.date.accessioned2019-06-26T07:43:37Z
dc.date.available2019-06-26T07:43:37Z
dc.date.issued2016-12
dc.identifier.citationTurduev, M., Hayran, Z., & Kurt, H. (2016). Focusing of light beyond the diffraction limit by randomly distributed graded index photonic medium. Journal of Applied Physics, 120(24), 243102.en_US
dc.identifier.issn218979
dc.identifier.urihttps://aip.scitation.org/doi/10.1063/1.4972980-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/1347-
dc.description.abstractSub-wavelength focusing of light holds great potential in various applications of science and engineering, including nanolithography, optical microscopy, optical measurements, and data storage. In the present paper, we propose a new concept to obtain sub-wavelength focusing of light by using structures composed of all-dielectric materials. The approach utilizes the design of an inhomogeneous refractive index profile with random distributions of individual elements occupying the unit cells of two-dimensional photonic crystals (PCs). Light focusing phenomenon is both systematically and quantitatively analyzed at different selected frequencies and we show that the randomly generated graded index (GRIN)-like photonic medium provides light focusing in air with a spot size below ?/3, where ? is the wavelength of light. The numerically obtained minimum spot size is equal to 0.260?. Gaussian probability function is used to implement numerous random designs to investigate the optical characteristics of the photonic medium. Specific attention is paid to the sub-wavelength focusing properties of the designed random PC structures. The random ingredient of GRIN PC provides not only narrow focusing of light but also off-centered or asymmetric light focusing at the back side of the structure. Experimental verification conducted at the microwave region shows good agreement with the numerical results. © 2016 Author(s).en_US
dc.language.isoenen_US
dc.publisherAmerican Institute Of Physics Inc.en_US
dc.relation.ispartofJournal Of Applied Physicsen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMetamaterialsen_US
dc.subjectMultilayersen_US
dc.subjecthyperbolic dispersionen_US
dc.titleFocusing of Light Beyond the Diffraction Limit by Randomly Distributed Graded Index Photonic Mediumen_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.volume120
dc.identifier.issue24
dc.authorid0000-0002-0749-4205-
dc.identifier.wosWOS:000392174000002en_US
dc.identifier.scopus2-s2.0-85008627368en_US
dc.institutionauthorKurt, Hamza-
dc.identifier.doi10.1063/1.4972980-
dc.authorscopusid57189350201-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ1-
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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