Experimental observation of subwavelength localization using metamaterial-based cavities

Date
2009-01-01
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Source Title
Optics Letters
Print ISSN
0146-9592
Electronic ISSN
1539-4794
Publisher
Optical Society of America
Volume
34
Issue
1
Pages
88 - 90
Language
English
Type
Article
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Abstract

We report subwavelength localization of electromagnetic fields within cavities based on metamaterials. Cavity resonances are observed in the transmission spectrum of a split-ring resonator and composite metamaterials cavity structures. These cavity resonances are shown to exhibit high-quality factors. Since the unit cells of metamaterials are much smaller than the operation wavelength, subwavelength localization is possible within these metamaterial cavity structures. In the present Letter, we show that the electromagnetic field is localized into a region of λ/8, where λ is the cavity resonance wavelength. © 2008 Optical Society of America.

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