Near-field polarization effects in molecular-motion-induced photochemical imaging

    Authors

    C. Hubert; R. Bachelot; J. Plain; S. Kostcheev; G. Lerondel; M. Juan; P. Royer; S. L. Zou; G. C. Schatz; G. P. Wiederrecht;S. K. Gray

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. C

    Keywords

    DISCRETE-DIPOLE APPROXIMATION; METAL NANOPARTICLES; POLYMERS; ANISOTROPY; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

    Abstract

    We demonstrate near-field polarization-sensitive photochemical imaging of the optical near fields produced by metal nanostructures under a variety of illumination conditions. The method relies on the optically induced vectorial molecular mass transport of a light-sensitive polymer. The experimental and theoretical results clearly show that this method can map the three spatial components of the optical near field of complex metal nanostructures. The method was applied to map the electromagnetic near field of silver bowtie nanostructures. In particular, we find that longitudinally polarized plasmons are confined at the top of the metallic structures. Furthermore, the intricate optical near fields in the polymer lead to molecular trapping regions at intensity minima.

    Journal Title

    Journal of Physical Chemistry C

    Volume

    112

    Issue/Number

    11

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    4111

    Last Page

    4116

    WOS Identifier

    WOS:000253946200016

    ISSN

    1932-7447

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