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dc.contributor.authorOner, B.B.
dc.contributor.authorCan, M.G.
dc.contributor.authorKurt, Hamza
dc.identifier.citationOner, B. B., Can, M. G., and Kurt, H. (2014, May). Partial cloaking by graded index photonic crystals. In Photonic Crystal Materials and Devices XI (Vol. 9127, p. 912708). International Society for Optics and Photonics.en_US
dc.descriptionPhotonic Crystal Materials and Devices XI (2014 : Brussels; Belgium)en_US
dc.description.abstractSince the first proposal of the idea of optical cloaking, huge research effort has been spent to implement hiding objects. We propose a broad band all-dielectric partial (unidirectional) cloaking device that hides arbitrary shaped objects. The cloaking structure is designed utilizing graded index (GRIN) photonic crystals. Refractive index distribution of the structure is chosen as a hyperbolic secant profile. In order to generate desired index profiles, both low and high dielectric backgrounds are chosen. The main principle of the cloaking in the study is separating the beam into two main parts while propagating through the composite device. Each part of the separated beam is strongly focused at the center of the stacked GRIN devices. Then these beams diverge and converge repeatedly without deteriorating the planar input field profile. This mechanism dramatically reduces the intensity at the center of the device. Therefore, existence of an object at the cloaked region almost does not affect wave front of the exiting beam due to this special light manipulation mechanism. In this manner, an observer cannot detect the hidden object. GRIN medium is a special type of inhomogeneous environment and light propagation is greatly affected by the presence of GRIN. Any partial cloaking solution as long as being practical and broadband in nature can be preferred. In this case, material selection and easy transferring the design to other electromagnetic spectrum regions become crucial. Therefore, the proposed idea in this work collects these desirable features. © 2014 SPIE.en_US
dc.description.sponsorshipBrussels Photonics Team (B-PHOT),Brussels-Capital Region,Fonds Wetenschappelijk Onderzoek (FWO),The Society of Photo-Optical Instrumentation Engineers (SPIE),Ville de Bruxelles
dc.subjectPhotonic crystalsen_US
dc.subjectgraded photonicen_US
dc.titlePartial cloaking by graded index photonic crystalsen_US
dc.relation.journalProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.contributor.departmentTOBB ETU, Faculty of Engineering, Department of Electrical & Electronics Engineeringen_US
dc.contributor.departmentTOBB ETÜ, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümütr_TR
dc.contributor.tobbetuauthorKurt, Hamza
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıtr_TR

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