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Near-field, broadband optical spectroscopy of metamaterials

✍ Scribed by Reuben M. Bakker; Vladimir P. Drachev; Hsiao-Kuan Yuan; Vladimir M. Shalaev

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
357 KB
Volume
394
Category
Article
ISSN
0921-4526

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✦ Synopsis

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.

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