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Schlagwörter:
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Zusammenfassung:
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.
