Journal
OPTICS EXPRESS
Volume 26, Issue 15, Pages 19275-19293Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.019275
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Funding
- Helmholtz Association, Helmholtz Postdoctoral Fellowship [PD140]
- Project PPP Mexiko 2j 16 - DAAD [57274178]
- Federal Ministry of Education and Research (BMBF)
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We investigate the chiroptical response of a single plasmonic nanohelix interacting with a weakly focused circularly polarized Gaussian beam. The optical scattering at the fundamental resonance is characterized experimentally and numerically. The angularly resolved scattering of the excited nanohelix is verified experimentally and it validates the numerical results. We employ a multipole decomposition analysis to study the fundamental and first higher-order resonance of the nanohelix, explaining their chiral properties in terms of the formation of chiral dipoles. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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