Počet záznamů: 1  

Nonadiabatic ponderomotive effects in photoemission from nanotips in intense midinfrared laser fields

  1. 1.
    0501011 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
    Schötz, J. - Mitra, S. - Fuest, H. - Neuhaus, M. - Okell, W.A. - Förster, M. - Paschen, T. - Ciappina, Marcelo F. - Yanagisawa, H. - Wnuk, P. - Hommelhoff, P. - Kling, M.F.
    Nonadiabatic ponderomotive effects in photoemission from nanotips in intense midinfrared laser fields.
    Physical Review A. Roč. 97, č. 1 (2018), s. 1-7, č. článku 013413. ISSN 2469-9926. E-ISSN 2469-9934
    Grant CEP: GA MŠMT EF16_019/0000789; GA MŠMT LQ1606
    Grant ostatní: OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
    Institucionální podpora: RVO:68378271
    Klíčová slova: above-threshold ionization * multiphoton ionization * electron acceleration * driven * tip * nanoscale * nanoparticles * emission * light * xenon
    Obor OECD: Fluids and plasma physics (including surface physics)
    Impakt faktor: 2.907, rok: 2018

    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.
    Trvalý link: http://hdl.handle.net/11104/0293038

     
     
Počet záznamů: 1  

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