553 citations · 1.9k across the 10 of their papers we have counts for
10 papers
Ultrafast time resolved photo-electric emission
Thomas Juffmann, Brannon B. Klopfer, Gunnar E. Skulason +4
The emission times of laser-triggered electrons from a sharp tungsten tip are directly characterized under ultrafast, near-infrared laser excitation at Keldysh parameters $6.6< γ<…
Ultrafast laser-triggered emission from hafnium carbide tips
Catherine Kealhofer, Seth M. Foreman, Stefan Gerlich +1
Electron emission from hafnium carbide (HfC) field emission tips induced by a sub-10 fs, 150 MHz repetition rate Ti:sapphire laser is studied. Two-photon emission is observed at lo…
Testing ultrafast mode-locking at microhertz relative optical linewidth
Michael J. Martin, Seth M. Foreman, T. R. Schibli +1
We report new limits on the phase coherence of the ultrafast mode-locking process in an octave-spanning Ti:sapphire comb. We find that the mode-locking mechanism correlates optical…
Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock
A. D. Ludlow, T. Zelevinsky, G. K. Campbell +16
Optical atomic clocks promise timekeeping at the highest precision and accuracy, owing to their high operating frequencies. Rigorous evaluations of these clocks require direct comp…
Coherent optical phase transfer over a 32-km fiber with 1-s instability at
Seth M. Foreman, Andrew D. Ludlow, Marcio H. G. de Miranda +3
The phase coherence of an ultrastable optical frequency reference is fully maintained over actively stabilized fiber networks of lengths exceeding 30 km. For a 7-km link installed…
Nuclear Spin Effects in Optical Lattice Clocks
Martin M. Boyd, Tanya Zelevinsky, Andrew D. Ludlow +4
We present a detailed experimental and theoretical study of the effect of nuclear spin on the performance of optical lattice clocks. With a state-mixing theory including spin-orbit…