Journal
IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume 9, Issue 1, Pages 55-61Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2009.2025945
Keywords
Electromagnetic cloaking; metamaterials; scattering reduction
Categories
Funding
- European Space Agency (ESA)
- Programmi di ricerca di Rilevante Interesse Nazionale (PRIN)
- FP-7 Electromagnetic Characterization of Nanostructured Materials (ECONAM)
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In this paper, we present the design of cylindrical and spherical electromagnetic cloaks working at visible frequencies. The cloak design is based on the employment of layered structures consisting of alternating plasmonic and nonplasmonic materials, and exhibiting the collective behavior of an effective epsilon-near-zero material at optical frequencies. The design of a cylindrical cloak to hide cylindrical objects is first presented. Two alternative layouts are proposed, and both magnetic and nonmagnetic objects are considered. Then, the design of spherical cloaks is also presented. The full-wave simulations presented throughout the paper confirm the validity of the proposed setup, and show how this technique can be used to reduce the observability of cylindrical and spherical objects. The effect of the losses is also considered.
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