Journal
OPTICS LETTERS
Volume 43, Issue 4, Pages 927-930Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.000927
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Funding
- U.S. Department of Energy (DOE) [DE-FG02-01ER45916, DE-FG02-09ER4655]
- McMinn Endowment at Vanderbilt
- U.S. Department of Energy (DOE) [DE-FG02-01ER45916] Funding Source: U.S. Department of Energy (DOE)
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Asymmetric nanophotonic structures enable a wide range of opportunities in optical nanotechnology because they support efficient optical nonlinearities mediated by multiple plasmon resonances over a broad spectral range. The Archimedean nanospiral is a canonical example of a chiral plasmonic structure because it supports even-order nonlinearities that are not generally accessible in locally symmetric geometries. However, the complex spiral response makes nanoscale experimental characterization of the plasmonic near-field structure highly desirable. Here we employ high-efficiency, high-spatial-resolution cathodoluminescence imaging in a scanning transmission electron microscope to describe the spatial, spectral, and polarization response of plasmon modes in the nanospiral geometry. (C) 2018 Optical Society of America
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