Thin low-loss dielectric coatings for free-space cloaking
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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.
Subject(160.5470) Polymers; (290.1350) Backscattering; (290.3200) Inverse scattering; (350.4010) Microwaves; (050.6624) Subwavelength structures; (290.2558) Forward scattering.
Published Version (Please cite this version)10.1364/OL.38.001606
Publication InfoUrzhumov, Yaroslav; Landy, Nathan; Driscoll, Tom; Basov, Dimitri; & Smith, David R (2013). Thin low-loss dielectric coatings for free-space cloaking. 10.1364/OL.38.001606. Retrieved from https://hdl.handle.net/10161/7861.
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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 Dieg
Adjunct Assistant Professor in the Department of Electrical and Computer Engineering
<!--[if gte mso 9]> <![endif]--> <!--[if gte mso 9]> <![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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