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https://hdl.handle.net/10316/102723
Title: | Uniaxial indefinite material formed by helical-shaped wires | Authors: | Morgado, Tiago A. Maslovski, Stanislav I. Silveirinha, Mário G. |
Issue Date: | 2012 | Serial title, monograph or event: | New Journal of Physics | Volume: | 14 | Issue: | 6 | Abstract: | We demonstrate that a racemic array of helical-shaped metallic wires may be regarded as a local uniaxial epsilon-negative (ENG) material even when the metal conductivity is very large (e.g. in the microwave regime) and, as a result, enables strong negative refraction over a wide frequency range. Based on the negative refraction effect, we demonstrate partial focusing of p-polarized electromagnetic radiation using a planar lens formed by such a composite material. The results reported here are supported by full-wave simulations as well as by analytical calculations based on effective medium theory. | URI: | https://hdl.handle.net/10316/102723 | ISSN: | 1367-2630 | DOI: | 10.1088/1367-2630/14/6/063002 | Rights: | openAccess |
Appears in Collections: | I&D IT - Artigos em Revistas Internacionais |
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