Journal
PHYSICA B-CONDENSED MATTER
Volume 394, Issue 2, Pages 137-140Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2006.12.045
Keywords
near-field scanning optical microscopy (NSOM); broadband spectroscopy; metamaterials; supercontinuum
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Near-field, broadband optical spectroscopy of metamaterials is reported. A compact, easy to assemble supercontinuum light source, coupled with a near-field scanning optical microscope and spectrometer provide the means to locally probe the spectral response of a nanorod metamaterial sample. Spectral maps of near-field transmittance are obtained for the spectral range from 500 to 950 nm. In comparison to far-field measurement, the average of the near-field mappings shows a significant increase in transmittance. The uniqueness of the spectral maps and the increased transmittance indicates a strong nanoantenna effect between the sample and the plasmonic near-field aperture. (c) 2007 Elsevier B.V. All rights reserved.
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