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      Anisotropic Metamaterials Emulated by Tapered Waveguides: Application to Optical Cloaking

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          Abstract

          We demonstrate that metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance. Based on this technique, we demonstrate broadband electromagnetic cloaking in the visible frequency range on a scale approximately 100 times larger than the wavelength.

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          Nano-optics of surface plasmon polaritons

          Anatoly Zayats, Igor I. Smolyaninov, Alexei A. Maradudin (2005)
          Article 0 comments Cited 384 times – based on 0 reviews     Review now
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            Broadband invisibility by non-Euclidean cloaking.

            Ulf Leonhardt, Tomás Tyc (2009)
            Invisibility and negative refraction are both applications of transformation optics where the material of a device performs a coordinate transformation for electromagnetic fields. The device creates the illusion that light propagates through empty flat space, whereas in physical space, light is bent around a hidden interior or seems to run backward in space or time. All of the previous proposals for invisibility require materials with extreme properties. Here we show that transformation optics of a curved, non-Euclidean space (such as the surface of a virtual sphere) relax these requirements and can lead to invisibility in a broad band of the spectrum.
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              Cloaking and transparency for collections of particles with metamaterial and plasmonic covers.

              Andrea Alù, Nader Engheta (2007)
              Following our recently developed idea of employing plasmonic covers to cloak an isolated conducting, plasmonic or insulating sphere through scattering cancellation, here we extend this concept by investigating the possibility of cloaking multiple objects placed in close proximity of each other, or even joined together to form a single object of large electrical size. We show how the coupling among the single particles, even when placed in the very near zone of each other, is drastically lowered by the presence of suitably designed covers, thus providing the possibility of making collections of objects transparent and "cloaked" to the impinging radiation even when the total physical size of the system is sensibly larger than the wavelength. Numerical simulations and animations validate these results and give further insights into the anomalous phenomenon of transparency and cloaking induced by plasmonic materials and metamaterials.
              Article 0 comments Cited 38 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): PRLTAO
                Title: Physical Review Letters
                Abbreviated Title: Phys. Rev. Lett.
                Publisher: American Physical Society (APS)
                ISSN (Print): 0031-9007
                ISSN (Electronic): 1079-7114
                Publication date Created: May 2009
                Publication date (Electronic): May 27 2009
                Volume: 102
                Issue: 21
                Article
                DOI: 10.1103/PhysRevLett.102.213901
                PubMed ID: 19519106
                SO-VID: 8ef55a4e-c6fa-4314-b8cb-537fbcef33ec
                Copyright © © 2009
                License:

                http://link.aps.org/licenses/aps-default-license

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