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Analytical, numerical, and experimental investigation of a Luneburg lens system for directional cloaking

Show simple item record Babayiğit, Ceren Evren, Aydın S. Bor, Emre Kurt, Hamza Turduev, Mirbek 2019-12-25T14:03:34Z 2019-12-25T14:03:34Z 2019
dc.identifier.citation Babayiğit, C., Evren, A. S., Bor, E., Kurt, H., and Turduev, M. (2019). Analytical, numerical, and experimental investigation of a Luneburg lens system for directional cloaking. Physical Review A, 99(4), 043831. en_US
dc.identifier.issn  24699926
dc.description.abstract In this study, the design of a directional cloaking based on the Luneburg lens system is proposed and its operating principle is experimentally verified. The cloaking concept is analytically investigated via geometrical optics and numerically realized with the help of the finite-difference time-domain method. In order to benefit from its unique focusing and/or collimating characteristics of light, the Luneburg lens is used. We show that by the proper combination of Luneburg lenses in an array form, incident light bypasses the region between junctions of the lenses, i.e., the "dark zone." Hence, direct interaction of an object with propagating light is prevented if one places the object to be cloaked inside that dark zone. This effect is used for hiding an object which is made of a perfectly electric conductor material. In order to design an implementable cloaking device, the Luneburg lens is discretized into a photonic crystal structure having gradually varying air cylindrical holes in a dielectric material by using Maxwell Garnett effective medium approximations. Experimental verifications of the designed cloaking structure are performed at microwave frequencies of around 8 GHz. The proposed structure is fabricated by three-dimensional printing of dielectric polylactide material and a brass metallic alloy is utilized in place of the perfectly electric conductor material in microwave experiments. Good agreement between numerical and experimental results is found. © 2019 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
dc.subject Metamaterials  en_US
dc.subject optics  en_US
dc.subject carpet cloak en_US
dc.title Analytical, numerical, and experimental investigation of a Luneburg lens system for directional cloaking en_US
dc.type article en_US
dc.relation.journal Physical Review A en_US
dc.contributor.department TOBB ETU, Faculty of Engineering, Department of Electrical & Electronics Engineering en_US
dc.contributor.department TOBB ETÜ, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü tr_TR
dc.identifier.volume 99
dc.identifier.issue 4
dc.relation.tubitak [116F182] en_US
dc.identifier.scopus 2-s2.0-85064880473
dc.contributor.tobbetuauthor Kurt, Hamza
dc.identifier.doi 10.1103/PhysRevA.99.043831
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı tr_TR

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