An ultrafast nanotip electron gun triggered by grating-coupled surface plasmons

Schröder, B.; Sivis, M.; Bormann, R.; Schäfer, S.; Ropers, Claus

doi:10.1063/1.4937121

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An ultrafast nanotip electron gun triggered by grating-coupled surface plasmons

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Ropers, Claus
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Schröder, B., Sivis, M., Bormann, R., Schäfer, S., & Ropers, C. (2015). An ultrafast nanotip electron gun triggered by grating-coupled surface plasmons. Applied Physics Letters, 107(23): 231105. doi:10.1063/1.4937121.

Cite as: https://hdl.handle.net/21.11116/0000-000B-5D9C-E

Abstract

We demonstrate multiphoton photoelectron emission from gold nanotips induced by nanofocusing

surface plasmons, resonantly excited on the tip shaft by a grating coupler. The tip is integrated into

an electron gun assembly, which facilitates control over the spatial emission sites and allows us to

disentangle direct grating emission from plasmon-triggered apex emission. The nanoscale source

size of this electron gun concept enables highly coherent electron pulses with applications in

ultrafast electron imaging and diffraction.