Multifrequency invisibility and masking of cylindrical dielectric objects using double-positive and double-negative metamaterials
Author
Serebryannikov, A. E.
Özbay, Ekmel
Date
2009Source Title
Journal of Optics A: Pure and Applied Optics
Print ISSN
1464-4258
Electronic ISSN
1741-3567
Publisher
Institute of Physics Publishing Ltd.
Volume
11
Issue
11
Pages
114020 (1-9)
Language
English
Type
ArticleItem Usage Stats
150
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100
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Abstract
We demonstrate that a circular dielectric cylinder can be nearly invisible at multiple frequencies when being coated with a ring shell, which is made of an isotropic material simultaneously showing large positive or large negative values of permittivity and permeability. The suggested cloaking mechanism is based on the use of radial resonances, which are similar to those in conventional Fabry-Perot resonators. It can be used for cylindrical objects for a wide range of variation of the diameter-to-wavelength ratio, which includes the values corresponding to subwavelength to resonant-sized objects. The presence of frequency dispersion of the shell material positively affects the possibility of multifrequency operation.