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