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Nonadiabatic ponderomotive effects in photoemission from nanotips in intense midinfrared laser fields
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SYSNO ASEP 0501011 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nonadiabatic ponderomotive effects in photoemission from nanotips in intense midinfrared laser fields Author(s) Schötz, J. (DE)
Mitra, S. (DE)
Fuest, H. (DE)
Neuhaus, M. (DE)
Okell, W.A. (DE)
Förster, M. (DE)
Paschen, T. (DE)
Ciappina, Marcelo F. (FZU-D) ORCID
Yanagisawa, H. (DE)
Wnuk, P. (DE)
Hommelhoff, P. (DE)
Kling, M.F. (DE)Number of authors 12 Article number 013413 Source Title Physical Review A. - : American Physical Society - ISSN 2469-9926
Roč. 97, č. 1 (2018), s. 1-7Number of pages 7 s. Language eng - English Country US - United States Keywords above-threshold ionization ; multiphoton ionization ; electron acceleration ; driven ; tip ; nanoscale ; nanoparticles ; emission ; light ; xenon Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects EF16_019/0000789 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LQ1606 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000423108900005 EID SCOPUS 85040602170 DOI 10.1103/PhysRevA.97.013413 Annotation Transient near fields around metallic nanotips drive many applications, including the generation of ultrafast electron pulses and their use in electronmicroscopy. We have investigated the electron emission from a gold nanotip driven by midinfrared few-cycle laser pulses. We identify a low-energy peak in the kinetic energy spectrum and study its shift to higher energies with increasing laser intensities from 1.7 to 8.9 x 10(11) W/cm(2). The experimental observation of the upshift of the low-energy peak is compared to a simple model and numerical simulations, which show that the decay of the near field on a nanometer scale results in nonadiabatic transfer of the ponderomotive potential to the kinetic energy of emitted electrons and in turn to a shift of the peak. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
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