Electromagnetic cloaking with canonical spiral inclusions

Details Electromagnetic cloaking with canonical spiral inclusions Electromagnetic cloaking with canonical spiral inclusions

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10k5037g&link_type=abstract

New Journal of Physics, Volume 10, Issue 11, pp. 115037 (2008).

Physics

4

Scientific paper

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.

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