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arXiv · 1411.4808

Towards an optical far-field measurement of higher-order multipole contributions to the scattering response of nanoparticles

Thomas Bauer·Sergej Orlov·Gerd Leuchs·Peter Banzer
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Abstract

We experimentally show an all-optical multipolar decomposition of the lowest-order Eigenmodes of a single gold nanoprism using azimuthally and radially polarized cylindrical vector beams. By scanning the particle through these tailored field distributions, the multipolar character of the Eigenmodes gets encoded into 2D-scanning intensity maps even for higher-order contributions to the Eigenmode that are too weak to be discerned in the direct far-field scattering response. This method enables a detailed optical mode analysis of individual nanoparticles.

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Thomas Bauer, Sergej Orlov, Gerd Leuchs, Peter Banzer. 2014-11-18. Towards an optical far-field measurement of higher-order multipole contributions to the scattering response of nanoparticles. https://doi.org/10.1063/1.4914117

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