@article {Vogelsang1115_2015,
	year = {2015},
	author = {Vogelsang, Jan and Robin, Jörg and Nagy, Benedek J and Dombi, Péter and Rosenkranz, Daniel and Schiek, Manuela and Groß, Petra and Lienau, Christoph},
	title = {Ultrafast Electron Emission from a Sharp Metal Nanotaper Driven by Adiabatic Nanofocusing of Surface Plasmons},
	journal = {Nano letters},
	volume = {15},
	number = {7},
	page = {4685-4691},
	DOI = {10.1021/acs.nanolett.5b01513},
	ISSN = {1},
	keywords = {Surface Plasmon Polaritons, Adiabatic Nanofocusing, Ultrafast Electron Microscopy, Few-cycle Light Pulses, Nanotip Electron Source, Point Projection Electron Microscopy},
	abstract = {We report photoelectron emission from the apex of a sharp gold nanotaper illuminated via grating coupling at a distance of 50 μm from the emission site with few-cycle near-infrared laser pulses. We find a fifty-fold increase in electron yield over that for direct apex illumination. Spatial localization of the electron emission to a nanometer-sized region is demonstrated by point-projection microscopic imaging of a silver nanowire. Our results reveal negligible plasmon-induced electron emission from the taper shaft and thus efficient nanofocusing of few-cycle plasmon wavepackets. This novel, remotely driven emission scheme offers a particularly compact source of ultrashort electron pulses of immediate interest for miniaturized electron microscopy and diffraction schemes with ultrahigh time resolution}
}