Achieving transparency with plasmonic and metamaterial coatings

Abstract

The possibility of using plasmonic and metamaterial covers to drastically reduce the total scattering cross section of spherical and cylindrical objects is discussed. While it is intuitively expected that increasing the physical size of an object may lead to an increase in its overall scattering cross section, here we see how a proper design of these lossless metamaterial covers near their plasma resonance may induce a dramatic drop in the scattering cross section, making these objects nearly "invisible" or "transparent" to an outside observer-a phenomenon with obvious applications for low-observability and noninvasive probe design. Physical insights into this phenomenon and some numerical results are provided. The possibility of using plasmonic and metamaterial covers to drastically reduce the total scattering cross section of spherical and cylindrical objects is discussed. While it is intuitively expected that increasing the physical size of an object may lead to an increase in its overall scattering cross section, here we see how a proper design of these lossless metamaterial covers near their plasma resonance may induce a dramatic drop in the scattering cross section, making these objects nearly "invisible" or "transparent" to an outside observer-a phenomenon with obvious applications for low-observability and noninvasive probe design. Physical insights into this phenomenon and some numerical results are provided. Disciplines Systems and Communications

An elasto-mechanical unfeelability cloak made of pentamode metamaterials

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Wave–matter interactions in epsilon-and-mu-near-zero structures

“…47 that parallel metallic plates can simulate a 2D artificial plasma when the TE 10 mode is considered. The effective permittivity of the such waveguide structures follows a Drude-like model, that is, e h /e 0 ¼ e d À (p/k 0 d) 2 , where e d is the relative permittivity of the dielectric between the metallic plates, d is the separation between the metallic plates and k 0 is the wave number in free space. In such an environment, if d is chosen to be l 0 /2, where l 0 is the free space wavelength at some chosen operating frequency o c we need to load this waveguide with a material of permittivity e i þ 1, in order to emulate a material with relative permittivity e i .…”

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Peculiarities in the Dielectric Response of Negative-Permittivity Scatterers

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