Achieving transparency with plasmonic and metamaterial coatings

Achieving transparency with plasmonic and metamaterial coatings

2005 | Andrea Alù12, and Nader Engheta1,*
The paper discusses the possibility of using plasmonic and metamaterial coatings to significantly reduce the scattering cross section of spherical and cylindrical objects, making them nearly invisible or transparent to an external observer. The authors explore how the design of these lossless metamaterial covers near their plasma resonance can induce a dramatic drop in scattering, which is achieved without increasing the physical size of the object. They provide physical insights and numerical results to support their findings. The phenomenon is explained through the cancellation of multipolar scattering fields, which is insensitive to material losses or imperfections in the structure. This research has potential applications in low-observable targets, low-coupling in densely-packed devices, and non-invasive field nano-probes.The paper discusses the possibility of using plasmonic and metamaterial coatings to significantly reduce the scattering cross section of spherical and cylindrical objects, making them nearly invisible or transparent to an external observer. The authors explore how the design of these lossless metamaterial covers near their plasma resonance can induce a dramatic drop in scattering, which is achieved without increasing the physical size of the object. They provide physical insights and numerical results to support their findings. The phenomenon is explained through the cancellation of multipolar scattering fields, which is insensitive to material losses or imperfections in the structure. This research has potential applications in low-observable targets, low-coupling in densely-packed devices, and non-invasive field nano-probes.
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[slides and audio] Achieving transparency with plasmonic and metamaterial coatings.