Shape of Fano resonance line spectra calculated for silver nanorods

    Authors

    J. M. Reed; H. N. Wang; W. F. Hu;S. L. Zou

    Comments

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    Abbreviated Journal Title

    Opt. Lett.

    Keywords

    NANOSTRUCTURES; SCATTERING; Optics

    Abstract

    Using theoretical tools, we numerically demonstrated Fano line shapes in the scattering spectra of silver rods resulting from different mechanisms. One of the Fano line shapes is due to the coupling of an in-plane quadrupole and a dipole mode in a single rod. Two nodes were observed at the resonance wavelength, each of which is located at a quarter of the rod length from the two ends. The Fano resonance is strengthened when the silver rod is cut at the two nodal positions. The second mechanism that gives rise to a new Fano resonance peak occurs when the symmetry of the rod is broken and is a result of the asymmetric coupling between the two excited dipoles. (C) 2011 Optical Society of America

    Journal Title

    Optics Letters

    Volume

    36

    Issue/Number

    22

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    4386

    Last Page

    4388

    WOS Identifier

    WOS:000297215300026

    ISSN

    0146-9592

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