Femtosecond mode-locked lasers producing visible/infrared frequency combs have steadily
advanced our understanding of fundamental processes in nature. For example, optical …

The development of the optical frequency comb (a spectrum consisting of a series of evenly
spaced lines) has revolutionized metrology and precision spectroscopy owing to its ability to …

Computer simulation techniques for extreme nonlinear optics are reviewed with emphasis
on the high light-intensity regimes in which both bound and freed electronic states contribute …

Coherently enhancing laser pulses in a passive cavity provides ideal conditions for high-
order harmonic generation in a gas, with repetition rates around 100 MHz (refs,,). Recently …

Laser-driven high-order harmonic generation, provides spatially and temporally coherent
tabletop sources of broadband extreme-ultraviolet (XUV) light. These sources typically …

Time-and Angle-resolved photoelectron spectroscopy from surfaces can be used to record
the dynamics of electrons and holes in condensed matter on ultrafast time scales. However …

With its direct correspondence to electronic structure, angle-resolved photoemission
spectroscopy (ARPES) is a ubiquitous tool for the study of solids. When extended to the …

Ultrafast spectroscopy in the extreme ultraviolet demands for ever-higher pulse repetition
rates and photon energies. Here, we drive cavity-enhanced high-order harmonic generation …

Many atomic and molecular systems of fundamental interest possess resonance frequencies
in the extreme ultraviolet (XUV) where laser technology is limited and radiation sources …

We investigate power scaling of ultrashort-pulse enhancement cavities. We propose a
model for the sensitivity of a cavity design to thermal deformations of the mirrors due to the …