We show strong-field electron energy spectra from nanometric gold needle tips triggered by femtosecond laser pulses. For this, we use two different wavelengths, 800 nm with 12 fs pulse duration and 1550 nm with 170 fs pulse duration. With an extended plateau and cutoff of rescattered electrons, the recorded electron spectra show the tell-tale features of strong-field physics. Furthermore, the spectra clearly show above-threshold photoemission peaks. Such energy spectra are an ideal tool to benchmark current theory models.
Strong-field electron emission from gold needle tips
Present Address: Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, Graz 8010, Austria.
Jonas Heimerl, Stefan Meier, Adrian Kirchner, Tobias Weitz, Peter Hommelhoff; Strong-field electron emission from gold needle tips. J. Vac. Sci. Technol. B 1 September 2023; 41 (5): 052803. https://doi.org/10.1116/6.0002916
Download citation file: