Multipole interference in the second-harmonic optical radiation from gold nanoparticles

S. Kujala, B.K. Canfield, M. Kauranen, Y. Svirko, J. Turunen

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    Abstract

    We provide experimental evidence of higher multipole (magnetic dipole and electric quadrupole) radiation in second-harmonic (SH) generation from arrays of metal nanoparticles. Fundamental differences in the radiative properties of electric dipoles and higher multipoles yield opposite interference effects observed in the SH intensities measured in the reflected and transmitted directions. These interference effects clearly depend on the polarization of the fundamental field, directly indicating the importance of multipole effects in the nonlinear response. We estimate that higher multipoles contribute up to 20% of the total emitted SH field amplitude for certain polarization configurations.
    Translated title of the contributionMultipole interference in the second-harmonic optical radiation from gold nanoparticles
    Original languageEnglish
    Pages (from-to)pp. 167403-1-4
    Number of pages4
    JournalPhysical Review Letters
    Volume98
    Issue number16, 167403
    DOIs
    Publication statusPublished - 2007
    Publication typeA1 Journal article-refereed

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    • Publication forum level 3

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