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Schertz F, Schmelzeisen M, Mohammadi R, et al. Near field of strongly coupled plasmons: uncovering dark modes. Nano Lett. 2012;12(4):1885-90doi: 10.1021/nl204277y.
Schertz, F., Schmelzeisen, M., Mohammadi, R., Kreiter, M., Elmers, H. J., & Schönhense, G. (2012). Near field of strongly coupled plasmons: uncovering dark modes. Nano letters, 12(4), 1885-90. https://doi.org/10.1021/nl204277y
Schertz, Florian, et al. "Near field of strongly coupled plasmons: uncovering dark modes." Nano letters vol. 12,4 (2012): 1885-90. doi: https://doi.org/10.1021/nl204277y
Schertz F, Schmelzeisen M, Mohammadi R, Kreiter M, Elmers HJ, Schönhense G. Near field of strongly coupled plasmons: uncovering dark modes. Nano Lett. 2012 Apr 11;12(4):1885-90. doi: 10.1021/nl204277y. Epub 2012 Mar 26. PMID: 22429148.
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Nano Lett. 2012 Apr 11;12(4):1885-90. doi: 10.1021/nl204277y. Epub 2012 Mar 26.

Near field of strongly coupled plasmons: uncovering dark modes.

Nano letters

Florian Schertz, Marcus Schmelzeisen, Reza Mohammadi, Maximilian Kreiter, Hans-Joachim Elmers, Gerd Schönhense

Affiliations

  1. Institut für Physik, Johannes Gutenberg-Universität, Staudinger Weg 7, D-55128 Mainz, Germany. [email protected]

PMID: 22429148 DOI: 10.1021/nl204277y

Abstract

Strongly coupled plasmons in a system of individual gold nanoparticles placed at subnanometer distance to a gold film (nanoparticle-on-plane, NPOP) are investigated using two complementary single particle spectroscopy techniques. Optical scattering spectroscopy exclusively detects plasmon modes that couple to the far field via their dipole moment (bright modes). By using photoemission electron microscopy (PEEM), we detect in the identical NPOPs near-field modes that do not couple to the scattered far field (dark modes) and are characterized by a strongly enhanced nonlinear electron emission process. To our knowledge, this is the first time that both far- and near-field spectroscopy are carried out for identical individual nanostructures interacting via a subnanometer gap. Strongly resonant electron emission occurs at excitation wavelengths far off-resonant in the scattering spectra.

© 2012 American Chemical Society

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