Near-field, broadband optical spectroscopy of metamaterials

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• 作者：Reuben M. Bakker ; Vladimir P. Drachev ; Hsiao-Kuan Yuan ; Vladimir M. Shalaev
• 关键词：Near-field scanning optical microscopy (NSOM) ; Broadband spectroscopy ; Metamaterials ; Supercontinuum
• 刊名：Physica B
• 出版年：2007
• 出版时间：15 May 2007
• 年：2007
• 卷：394
• 期：2
• 页码：137-140
• 全文大小：356 K

文摘

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.