Title:
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Polarization-independent broadband bidirectional optical cloaking using a new type of inverse scattering approach
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Author:
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Hayran, Zeki; Herrero Simon, Ramon; Botey Cumella, Muriel; Kurt, Hamza; Staliunas, Kestutis
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
Abstract:
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Abstract:
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Since the advent of transformation optics a decade ago [1], the ability to achieve optical cloaking has become a matter of practical realization. However, so far extreme material requirements and large device areas have significantly posed an obstacle to realize compact cloaking schemes that are fully functional. Here, by taking a different approach and by following our recently developed general theorem to control the scattering behaviour of an arbitrary object on a specific demand [2], we show that nearly perfect bidirectional optical cloaking effect can be generated for any type of object with a given shape and size. Contrary to previous approaches, we reveal that such a method is always able to produce local refractive indices larger than one and that neither gain nor lossy materials are required. Furthermore, by means of numerical calculations, we demonstrate a highly tunable broad operational bandwidth of 550 nm (covering 650-1200 nm interval) and an angular aperture of 36° for both directions and polarizations. With these unprecedented features, we expect that the present work will hold a great potential to enable a new class of optical cloaking structures that will find applications particularly in communication systems, defence industry and in other related fields. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Ciències de la visió::Òptica física -Àrees temàtiques de la UPC::Física -Scattering (Physics) -Invisibility -Non-hermitian potentials -Scattering theory -Optical cloaking -Scattering cancellation -Graded-index optics -Dispersió (Física) |
Rights:
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Document type:
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Article - Submitted version Conference Object |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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