Paschen T, Nauk C, Dienstbier P, Hommelhoff P (2021)
Publication Language: English
Publication Type: Journal article, Letter
Publication year: 2021
URI: https://iopscience.iop.org/article/10.1088/1361-6455/ac13ff/meta
We study the rescattering of photoemitted electrons at aluminium needle tips. For various laser intensities we measure electron energy spectra to identify telltale features of strong-field rescattering, in particular a plateau with near-constant count rate and a high-energy cutoff. This rescattering process is used to investigate the geometry-dependent enhanced optical near-field at the apex of the aluminium tip. A large near-field enhancement, extracted from the spectral data, is supported by 3D finite-difference time-domain simulations. A systematic theoretical investigation of the near-field enhancement at aluminium tips shows a strong dependence on tip opening angle and radius of curvature.
APA:
Paschen, T., Nauk, C., Dienstbier, P., & Hommelhoff, P. (2021). Strong-field spectra and optical near-field enhancement at aluminium needle tips. Journal of Physics B: Atomic, Molecular and Optical Physics. https://dx.doi.org/10.1088/1361-6455/ac13ff
MLA:
Paschen, Timo, et al. "Strong-field spectra and optical near-field enhancement at aluminium needle tips." Journal of Physics B: Atomic, Molecular and Optical Physics (2021).
BibTeX: Download