xxiii πανελληνιο ÏƒÏ Î½ÎµÎ´ÏÎ¹Î¿ Ï†Ï ÏƒÎ¹ÎºÎ·Ï‚ στερεας καταστασης & επιστημης ...

Fishnet Structure: The Occurrence of Left-Handed Behavior Over a Wide Range of
Geometrical Parameters
Irini Tsiapa, Nikos Katsarakis*, Maria Kafesaki, George Kenanakis, Costas M. Soukoulis, Eleftherios N. Economou
Institute of Electronic Structure and Laser (IESL), Foundation for Research & Technology-Hellas (FORTH), P.O. Box 1527,
Vassilika Vouton, 711 10 Heraklion, Crete, Greece
*katsan@iesl.forth.gr
Left-handed metamaterials (LHMs), i.e. artificial materials that exhibit both negative effective electrical permittivity, ε and
magnetic permeability, µ, over a common frequency band, have received recently a lot of attention due to their interesting
electromagnetic (EM) properties that create new perspectives for the manipulation of electromagnetic waves (negative
refraction, evanescent wave amplification, perfect lensing etc). Here, we have carried out a systematic study of the so-called
fishnet design in the microwave frequency region, and have demonstrated its advanced performance, namely its ability to
produce left-handed behavior over a wide range of structure parameters. The role of the various geometrical parameters on
the resonance frequency and strength has been investigated by means of free-space microwave measurements and
simulations using the Finite Integration Technique, employed through the MicroWave Studio commercial software.
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