A permanent electric dipole moment (EDM) of a particle or system is a separation of charge
along its angular momentum axis and is a direct signal of T violation and, assuming CPT …

The combination of multiplexed mass spectrometry with photoionization by tunable-
synchrotron radiation has proved to be a powerful tool to investigate elementary reaction …

Recent demonstrations of high-harmonic generation (HHG) at very high repetition
frequencies (∼ 100 MHz) may allow for the revolutionary transfer of frequency combs to the …

The remarkable precision of frequency-comb (FC) lasers is transferred to the extreme
ultraviolet (XUV, wavelengths shorter than 100 nm), a frequency region previously not …

The 1 S-2 S two-photon transition in singly ionized helium is a highly interesting candidate
for precision tests of bound-state quantum electrodynamics (QED). With the recent advent of …

We generated a series of harmonics in a xenon gas jet inside a cavity seeded by pulses
from a Ti: sapphire mode-locked laser with a repetition rate of 10.8 MHz. Harmonics up to …

Besides serving as a frequency counter or clockwork, an optical frequency comb can be
used directly for spectroscopy, thus the name Direct Frequency Comb Spectroscopy (DFCS) …

We demonstrate that nonlinear frequency upconversion of few-cycle near-infrared (NIR)
laser pulses, by means of harmonic generation in noble gases, is a promising approach for …

The most precise determination of the ionisation and dissociation energies of molecular
hydrogen H2 was carried out recently by measuring three intervals independently: the X→ …

Attosecond pulses are created (by Fourier synthesis) from a comb of odd-order high
harmonics resulting from the non-perturbative interaction of intense near-visible laser light …