Design and experimental investigation of a chiral plasmonic nanotaper

Leeju Singh; Yuri Gorodetski

doi:10.1117/12.2589907

18 April 2021 Design and experimental investigation of a chiral plasmonic nanotaper

Leeju Singh, Yuri Gorodetski

Proceedings Volume 11769, Metamaterials XIII; 1176913 (2021) https://doi.org/10.1117/12.2589907
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

The phenomena of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, like a nanoparticle or a nanohole, the coupling between a broadband effect, i.e. scattering, and a discrete one such as surface plasmon excitation, leads to Fano-like plasmonic resonance line-shapes. The necessary phase matching requirements can be used to engineer the light-plasmon coupling and to achieve a directional plasmonic excitation. Here we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking nanostructure.

Conference Presentation

Citation Download Citation

Leeju Singh and Yuri Gorodetski "Design and experimental investigation of a chiral plasmonic nanotaper", Proc. SPIE 11769, Metamaterials XIII, 1176913 (18 April 2021); https://doi.org/10.1117/12.2589907

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