title: Tip-enhanced strong-field photoemission.
abstract: Nonlinear photoelectron emission from metallic nanotips is explored in the strong-field regime. The passage between the multiphoton and the optical field emission regimes is clearly identified. The experimental observations are in agreement with a quantum mechanical strong-field model.
authors.affiliation: Courant Research Center Nano-Spectroscopy and X-Ray Imaging, University of Göttingen, 37077 Göttingen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Bormann
authors.forename: M
authors.initials: M
authors.lastname: Gulde
authors.forename: A
authors.initials: A
authors.lastname: Weismann
authors.forename: S V
authors.initials: SV
authors.lastname: Yalunin
authors.forename: C
authors.initials: C
authors.lastname: Ropers