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Structure of plasmonic aerogel and the breakdown of the effective medium approximation


Reference:

Grogan, M. D. W., Heck, S. C., Hood, K. M., Maier, S. A. and Birks, T. A., 2011. Structure of plasmonic aerogel and the breakdown of the effective medium approximation. Optics Letters, 36 (3), pp. 358-360.

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    Official URL:

    http://dx.doi.org/10.1364/OL.36.000358

    Abstract

    A method for making aerogel doped with gold nanoparticles (GNPs) produces a composite material with a well-defined localized surface plasmon resonance peak at 520 nm. The width of the extinction feature indicates the GNPs are well dispersed in the aerogel, making it suited to optical study. A simple effective medium approximation cannot explain the peak extinction wavelengths. The plasmonic field extends on a scale where aerogel cannot be considered isotropic, so a new model is required: a 5nm glass coating on the GNPs models the extinction spectrum of the composite material, with air (aerogel), methanol (alcogel), or toluene filling the pores.

    Details

    Item Type Articles
    CreatorsGrogan, M. D. W., Heck, S. C., Hood, K. M., Maier, S. A. and Birks, T. A.
    DOI10.1364/OL.36.000358
    DepartmentsFaculty of Science > Physics
    Publisher StatementBirks_OL_2011_36_3_358.pdf: © 2011 The Optical Society. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.36.000358. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
    RefereedYes
    StatusPublished
    ID Code22790

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