Interaction of an Archimedean spiral structure with orbital angular momentum light

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Title: Interaction of an Archimedean spiral structure with orbital angular momentum light
Authors: Giannini, V
Maier, S
Xiao, X
Oh, S
Reiter, D
Kerber, R
Item Type: Journal Article
Abstract: Complementing the research of surface plasmon polariton vortices for Archimedean spiral structures grooved in gold platelets, we here study the analogous positive structure of an Archimedean spiral consisting of bent gold nanorods. We consider spirals of two different sizes, for which we perform numerical calculations with the boundary element method. For a micrometer-sized metallic structure we show that the scattered electric field forms a vortex in the centre of the spiral. When the spiral is illuminated by orbital angular momentum light, the topological charge of the vortex can be controlled. For a nanometer-sized plasmonic Archimedean spiral we find that the response to optical excitation is governed by several resonances. When the nanostructure is excited by orbital angular momentum light, different resonances appear compared to the excitation with plane waves. Our results highlight that the distinct architecture of the Archimedean spiral responds in a unique way to the excitation with orbital angular momentum light.
Issue Date: 28-Sep-2018
Date of Acceptance: 9-Sep-2018
URI: http://hdl.handle.net/10044/1/64592
DOI: https://dx.dox.org/10.1088/1367-2630/aae105
ISSN: 1367-2630
Publisher: Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft
Journal / Book Title: New Journal of Physics
Volume: 20
Copyright Statement: © 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Keywords: Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
orbital angular momentum light
vortex light
Archimedean spiral structure
light-matter interaction
PLASMONIC VORTEX LENS
MULTIPOLAR INTERBAND ABSORPTION
SEMICONDUCTOR QUANTUM-DOT
NANOANTENNAS
FIELD
TRANSMISSION
ENHANCEMENT
VORTICES
STATES
02 Physical Sciences
Fluids & Plasmas
Publication Status: Published
Article Number: 095005
Appears in Collections:Condensed Matter Theory
Physics
Experimental Solid State
Faculty of Natural Sciences



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