Journal
OPTICS EXPRESS
Volume 17, Issue 8, Pages 6591-6599Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.006591
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Funding
- Office of Naval Research [N0001406-1-0069]
- National Science Foundation [ATM0803779]
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The material properties of toroidal invisibility cloaks are derived based on the coordinate transformation method. The permittivity and permeability tensors for toroidal cloaks are substantially different from those for spherical cloaks, but quite similar to those for 2D cylindrical cloaks because a singularity is involved at the inner boundary in both the cases. The cloaking effect is confirmed by the electric field distribution in the vicinity of toroidal cloaks simulated from the generalized discrete-dipole approximation (DDA) method. This study extends the concept of electromagnetic cloaking of arbitrarily-shaped objects to a complex geometry. (c) 2009 Optical Society of America
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