K Guven et al 2008 New J. Phys. 10 115037 doi:10.1088/1367-2630/10/11/115037
Electromagnetic cloaking with canonical spiral inclusions
Focus on Cloaking and Transformation OpticsFocus on Cloaking and Transformation OpticsK Guven1,5, E Saenz2, R Gonzalo2, E Ozbay1,3 and S Tretyakov4
Show affiliationsPart of Focus on Cloaking and Transformation OpticsFocus on Cloaking and Transformation Optics
We report an electromagnetic cloaking structure that is composed of identical canonical spiral particles. By using the Clausius–Mosotti formula, the electric and magnetic polarizabilities of a single spiral particle are related to the relative permittivity and permeability of the sparse distribution of particles. The permittivity and permeability of the distribution are, in turn, defined according to the coordinate transformation, which leads to the cloaking effect. Spirals are optimized to exhibit equal permittivity and permeability response so that the cloak consisting of these spirals will work for both transverse electric (TE) and transverse magnetic (TM) polarizations. Measurement of the cloaking device surrounding a metal cylinder inside a parallel waveguide was performed. The steady-state propagation of an electromagnetic wave was reconstructed from the amplitude and phase data, which demonstrates that the field largely restores to a free-space propagation pattern after the cloak.
- PACS
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41.20.Jb Electromagnetic wave propagation; radiowave propagation
- Subjects
- Dates
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Issue 11 (November 2008)
Received 13 August 2008
Published 27 November 2008
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Electromagnetic cloaking with canonical spiral inclusions
K Guven et al 2008 New J. Phys. 10 115037
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