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

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Bauer,  Thomas
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Orlov,  Sergej
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Banzer,  Peter
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Bauer, T., Orlov, S., Leuchs, G., & Banzer, P. (2015). Towards an optical far-field measurement of higher-order multipole contributions to the scattering response of nanoparticles. APPLIED PHYSICS LETTERS, 106(9): 091108. doi:10.1063/1.4914117.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-63FA-A
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. (C) 2015 AIP Publishing LLC.