Angular-resolved electron energy loss spectroscopy on a split-ring resonator

von Cube, F.; Niegemann, J.; Irsen, S.; Bell, D. C.; Linden, S.

doi:Artn 115434

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Angular-resolved electron energy loss spectroscopy on a split-ring resonator

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von Cube, F.
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

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Irsen, S.
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

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von Cube, F., Niegemann, J., Irsen, S., Bell, D. C., & Linden, S. (2014). Angular-resolved electron energy loss spectroscopy on a split-ring resonator. Physical Review B, 89(11). doi:Artn 115434.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-60B2-F

Abstract

We investigate the plasmonic near field of a lithographically defined split-ring resonator with angular-resolved electron energy loss spectroscopy in a scanning transmission electron microscope. By tilting the sample, different electric field components of the plasmonic modes can be probed with the electron beam. The electron energy loss spectra recorded under oblique incidence can feature plasmonic resonances that are not observable under normal incidence. Our experimental findings are supported by full numerical calculations based on the discontinuous Galerkin time-domain method.