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Proceedings Paper

Plasmonic dark modes excited by strongly focused illumination
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Paper Abstract

Dark plasmon modes in metal nanoparticle systems are usually excited by non-optical means. We show that strongly focused illumination can lead to excitation of dark modes. We first use rigorous vectorial diffraction theory to compute the distribution of light at the focus and then numerically calculate the response of single particles and particle dimers. Controlling the distribution of light arriving at the focusing lens by pupil filters enables enhancing the excitation of dark modes. Overall, these results present guidelines for the excitation of dark plasmon modes using standard optical instrumentation.

Paper Details

Date Published: 28 August 2015
PDF: 7 pages
Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 954731 (28 August 2015); doi: 10.1117/12.2187807
Show Author Affiliations
Jordi Sancho-Parramon, Rudjer Boskovic Institute (Croatia)
Salvador Bosch, Univ. de Barcelona (Spain)
David Maluenda, Univ. de Barcelona (Spain)
Hrvoje Zorc, Rudjer Boskovic Institute (Croatia)

Published in SPIE Proceedings Vol. 9547:
Plasmonics: Metallic Nanostructures and Their Optical Properties XIII
Allan D. Boardman; Din Ping Tsai, Editor(s)

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