Vortex electron energy loss spectroscopy for near-field mapping of magnetic plasmons
Date
2012
Authors
Mohammadi, Zeinab
Van Vlack, Cope P.
Hughes, Stephen
Bornemann, Jens
Gordon, Reuven
Journal Title
Journal ISSN
Volume Title
Publisher
Optics Express
Abstract
The theory of vortex electron beam electron energy loss
spectroscopy (EELS), or vortex-EELS for short, is presented. This theory
is applied, using Green function calculations within the finite-difference
time-domain method, to calculate spatially resolved vortex-EELS maps of a
metal split ring resonator (SRR). The vortex-EELS scattering cross section
for the SRR structure is within an order of magnitude of conventional EELS
typically for metal nanoparticles. This is promising in terms of feasibility
for future measurements to map out the local magnetic response of metal
nanostructures and to characterize their magnetic plasmon response in
applications, including metamaterials.
Description
Keywords
Surface plasmons, Metamaterials, Spectroscopy, inelastic scattering including Raman
Citation
Mohammadi, Z., Van Vlack, C. P., Hughes, S., Bornemann, J., & Gordon, R. (2012). Vortex electron energy loss spectroscopy for near-field mapping of magnetic plasmons. Optics Express, 20(14), 15024-15034. https://doi.org/10.1364/OE.20.015024