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Extreme-ultraviolet frequency combs for precision metrology and attosecond science
Femtosecond mode-locked lasers producing visible/infrared frequency combs have steadily
advanced our understanding of fundamental processes in nature. For example, optical …
advanced our understanding of fundamental processes in nature. For example, optical …
Narrow and ultranarrow transitions in highly charged Xe ions as probes of fifth forces
Optical frequency metrology in atoms and ions can probe hypothetical fifth forces between
electrons and neutrons by sensing minute perturbations of the electronic wave function …
electrons and neutrons by sensing minute perturbations of the electronic wave function …
Inner-shell clock transition in atomic thulium with a small blackbody radiation shift
One of the key systematic effects limiting the performance of state-of-the-art optical clocks is
the blackbody radiation (BBR) shift. Here, we demonstrate unusually low sensitivity of a 1.14 …
the blackbody radiation (BBR) shift. Here, we demonstrate unusually low sensitivity of a 1.14 …
[HTML][HTML] The Heidelberg compact electron beam ion traps
Electron beam ion traps (EBITs) are ideal tools for both production and study of highly
charged ions (HCIs). In order to reduce their construction, maintenance, and operation costs …
charged ions (HCIs). In order to reduce their construction, maintenance, and operation costs …
Detection of metastable electronic states by Penning trap mass spectrometry
State-of-the-art optical clocks achieve precisions of 10− 18 or better using ensembles of
atoms in optical lattices, or individual ions in radio-frequency traps,. Promising candidates …
atoms in optical lattices, or individual ions in radio-frequency traps,. Promising candidates …
[HTML][HTML] Closed-cycle, low-vibration 4 K cryostat for ion traps and other applications
In vacuo cryogenic environments are ideal for applications requiring both low temperatures
and extremely low particle densities. This enables reaching long storage and coherence …
and extremely low particle densities. This enables reaching long storage and coherence …
XUV frequency comb production with an astigmatism-compensated enhancement cavity
We have developed an extreme ultraviolet (XUV) frequency comb for performing ultra-high
precision spectroscopy on the many XUV transitions found in highly charged ions (HCI) …
precision spectroscopy on the many XUV transitions found in highly charged ions (HCI) …
Atom interferometer driven by a picosecond frequency comb
We demonstrate a light-pulse atom interferometer based on the diffraction of free-falling
atoms by a picosecond frequency-comb laser. More specifically, we coherently split and …
atoms by a picosecond frequency-comb laser. More specifically, we coherently split and …
Below-threshold harmonic generation in gas-jets for Th-229 nuclear spectroscopy
The generation of below-threshold harmonics in gas-jets constitutes a promising path
towards optical frequency combs in the vacuum ultra-violet (VUV) spectral range. Of …
towards optical frequency combs in the vacuum ultra-violet (VUV) spectral range. Of …
[HTML][HTML] An ultralow-noise superconducting radio-frequency ion trap for frequency metrology with highly charged ions
J Stark, C Warnecke, S Bogen, S Chen… - Review of Scientific …, 2021 - pubs.aip.org
We present a novel ultrastable superconducting radio-frequency (RF) ion trap realized as a
combination of an RF cavity and a linear Paul trap. Its RF quadrupole mode at 34.52 MHz …
combination of an RF cavity and a linear Paul trap. Its RF quadrupole mode at 34.52 MHz …