Thin low-loss dielectric coatings for free-space cloaking
Abstract
We report stereolithographic polymer-based fabrication and experimental operation
of a microwave X-band cloaking device. The device is a relatively thin (about one
wavelength thick) shell of an air dielectric composite, in which the dielectric component
has negligible loss and dispersion. In a finite band (9.7–10.1 GHz), the shell eliminates
the shadow and strongly suppresses scattering from a conducting cylinder of six-wavelength
diameter for TE-polarized free-space plane waves. The device does not require an immersion
liquid or conducting ground planes for its operation. The dielectric constant of the
polymer is low enough (ϵ 2.45) to suggest that this cloaking technique would be
suitable for higher frequency radiation, including visible light.
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https://hdl.handle.net/10161/7861Published Version (Please cite this version)
10.1364/OL.38.001606Publication Info
(2013). Thin low-loss dielectric coatings for free-space cloaking. 10.1364/OL.38.001606. Retrieved from https://hdl.handle.net/10161/7861.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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David R. Smith
James B. Duke Distinguished Professor of Electrical and Computer Engineering
Dr. David R. Smith is currently the James B. Duke Professor of Electrical and Computer
Engineering Department at Duke University. He is also Director of the Center for Metamaterials
and Integrated Plasmonics at Duke and holds the positions of Adjunct Associate Professor
in the Physics Department at the University of California, San Diego, and Visiting
Professor of Physics at Imperial College, London. Dr. Smith received his Ph.D. in
1994 in Physics from the University of California, San D
Yaroslav A. Urzhumov
Adjunct Assistant Professor in the Department of Electrical and Computer Engineering
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<![endif]-->Dr. Urzhumov is Adjunct Assistant Professor of ECE at Duke University,
and also a Technologist at the Metamaterials Commercialization Center of Intellectual
Ventures. Previously a research faculty at Duke, he works on applied and theoretical
aspects of metama
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