In the past decade we have witnessed remarkable advances associated with the frequency
stabilization of the comb present in the output of a mode-locked femtosecond laser. While …

The ability to cool, manipulate, and trap atoms using laser light has allowed a new, rapidly
expanding field to emerge. Current research focuses on improving existing cooling …

We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S
transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to …

Since 1998, the interaction of precision spectroscopy and ultrafast laser science has led to
several notable accomplishments. Femtosecond laser optical frequency 'combs'(evenly …

The spectroscopic hyperfine constants for all the alkali atoms are reported. For atoms from
lithium to cesium, only the long lived atomic isotopes are examined. For francium, the …

Ultrashort laser pulses have thus far been used in two distinct modes. In the time domain,
the pulses have allowed probing and manipulation of dynamics on a subpicosecond time …

Systematic study of Rb atomic properties is carried out using a high-precision relativistic all-
order method. Excitation energies of the ns, np, nd, and nf (n⩽ 10) states in neutral rubidium …

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 …

Precision spectroscopy at ultraviolet and shorter wavelengths has been hindered by the
poor access of narrow-band lasers to that spectral region. We demonstrate high-accuracy …