Ultrafast Electron Emission from a Sharp Metal Nanotaper Driven by Adiabatic Nanofocusing of Surface Plasmons

• DOI: 10.1021/acs.nanolett.5b01513
• Publication Date: 2015-06-10T18:06:39Z
• Authors: Jan Vogelsang; Jörg Robin; Benedek J. Nagy; Péter Dombi; Daniel Rosenkranz; Manuela Schiek; Petra Groß; Christoph Lienau
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

We report photoelectron emission from the apex of a sharp gold nanotaper illuminated via grating coupling at distance 50 μm site with few-cycle near-infrared laser pulses. find fifty-fold increase in electron yield over that for direct illumination. Spatial localization to nanometer-sized region is demonstrated by point-projection microscopic imaging silver nanowire. Our results reveal negligible plasmon-induced taper shaft and thus efficient nanofocusing plasmon wavepackets. This novel, remotely driven scheme offers particularly compact source ultrashort pulses immediate interest miniaturized microscopy diffraction schemes ultrahigh time resolution.