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Proceedings Paper

Optical magnetism in core-satellite nanostructures excited by vector beams
Author(s): John Parker; Stephen Gray; Norbert F. Scherer
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Paper Abstract

Core-satellite nanostructures are meta-atom candidates that have strong magnetic modes at optical frequencies and their characterization is important for the development of metamaterials and metafluids. We utilize an electrodynamics-multipolar analysis (ED-MA) method to perform a detailed study of the electric and magnetic modes of a core-satellite nanostructure composed of silver nanoparticles decorated on a dielectric core. In addition to excitation with linearly polarized scalar beams, we utilize radially and azimuthally polarized cylindrical vector beams to selectively excite and enhance the multipolar modes of the core-satellite nanostructure. The refractive index of the dielectric core is altered to better understand the role of retardation in the unique multipolar modes that arise from these vector beam excitations. A more complex Ag-core silica-shell nanostructure decorated with Ag-satellites is also introduced and is shown to diminish the role of magnetic modes and introduce new electric modes selectively excited by a radially polarized beam.

Paper Details

Date Published: 21 February 2018
PDF: 9 pages
Proc. SPIE 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII, 105411I (21 February 2018); doi: 10.1117/12.2290877
Show Author Affiliations
John Parker, Univ. of Chicago (United States)
Stephen Gray, Argonne National Lab. (United States)
Norbert F. Scherer, Univ. of Chicago (United States)

Published in SPIE Proceedings Vol. 10541:
Photonic and Phononic Properties of Engineered Nanostructures VIII
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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