title: Ultrafast Time-Resolved Photoelectric Emission.
abstract: The emission times of laser-triggered electrons from a sharp tungsten tip are directly characterized under ultrafast, near-infrared laser excitation at Keldysh parameters of 6.6<γ<19.1. Emission delays up to 10 fs are observed, which are inferred from the energy gain of photoelectrons emitted into a synchronously driven microwave cavity. Few femtosecond timing resolution is achieved in a configuration capable of measuring timing shifts up to 55 ps. The technique can also be used to measure the microwave phase inside the cavity with a precision below 70 fs upon the energy resolved detection of a single electron.
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Thomas
authors.initials: T
authors.lastname: Juffmann
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Brannon B
authors.initials: BB
authors.lastname: Klopfer
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Gunnar E
authors.initials: GE
authors.lastname: Skulason
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Catherine
authors.initials: C
authors.lastname: Kealhofer
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Fan
authors.initials: F
authors.lastname: Xiao
authors.affiliation: Department of Physics and Astronomy, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117, USA.
authors.forename: Seth M
authors.initials: SM
authors.lastname: Foreman
authors.affiliation: Physics Department, Stanford University, Stanford, California 94305, USA.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Kasevich