Journal
NEW JOURNAL OF PHYSICS
Volume 14, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/14/8/085019
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Funding
- Austrian Science Foundation (FWF) [SFB-041 ViCoM, P21141-N16]
- International Max Planck Research School of Advanced Photon Science
- European Union
- Austrian Science Fund (FWF) [P21141] Funding Source: Austrian Science Fund (FWF)
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We discuss the interaction of ultrashort near-infrared laser pulses with sharp metal tips at moderate nominal intensities (I-0 similar to 10(11) W cm(-2)). As external electric fields are strongly enhanced at such tips (enhancement factor similar to 10) our system turns out to be an ideal miniature laboratory to investigate strong-field effects at solid surfaces. We analyse the electron-energy spectra as a function of the strength of the laser field and the static extraction field and present an intuitive model for their interpretation. The size of the effective field acting on the metal electrons can be determined from the electron spectra. The latter are also reproduced by time-dependent density functional theory (TDDFT) simulations.
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