Experimental demonstration of subwavelength focusing of electromagnetic waves by labyrinth-based two-dimensional metamaterials
2006; Optica Publishing Group; Volume: 31; Issue: 6 Linguagem: Inglês
10.1364/ol.31.000814
ISSN1539-4794
Autoresİrfan Bulu, Hümeyra Çağlayan, Ekmel Özbay,
Tópico(s)Advanced Antenna and Metasurface Technologies
ResumoWe studied focusing in a two-dimensional metamaterial that was based on a labyrinth structure. We theoretically showed that the labyrinth-based metamaterial exhibits negative indices of refraction between 6 and 6.4 GHz. We experimentally studied the focusing effect by measuring electric field intensities on the output side of the metamaterial when the source was placed in front of the input side of the metamaterial. Our experimental results showed that it is in fact possible to focus the source field with half-widths as small as wavelength/4 by using the labyrinth-based metamaterial.
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