Labyrinth based left-handed metamaterials and sub-wavelength focusing of electromagnetic waves
Author
Özbay, Ekmel
Bulu, İrfan
Çağlayan, Hümeyra
Date
2006Source Title
Proceedings of SPIE Vol. 6128, Photonic Crystal Materials and Devices IV
Print ISSN
0277-786X
Publisher
SPIE
Volume
6128
Pages
814 - 816
Language
English
Type
Conference PaperItem Usage Stats
133
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Abstract
We propose and demonstrate a resonant structure that solves two major problems related to the split-ring resonator structure. These major problems may be stated as the bianisotropy and electric coupling to the magnetic resonance. These two problems introduce difficulties in obtaining isotropic left-handed metamaterial mediums. The resonant structure that we propose here solves both of these problems. We further show that in addition to the magnetic resonance, when combined with a suitable wire medium, the structure that we propose exhibits left-handed transmission band. We further demonstrate the sub-wavelength focusing of electromagnetic waves by use of a two dimensional labyrinth based metamaterial. Our experimental results showed that it is possible to focus the source field with half widths as small as λ/4 by using the labyrinth based metamaterial.
Keywords
Left-handed mediumMagnetic resonance
Metamaterial
Split-ring resonator
Sub-wavelength focusing
Anisotropy
Electromagnetic waves