381 citations · 1.2k across the 22 of their papers we have counts for
22 papers
Hyperfine structure and isotope shifts of the transition in atomic zinc
David Röser, J. Eduardo Padilla-Castillo, Ben Ohayon +5
We report absolute frequency, isotope shift, radiative lifetime and hyperfine structure measurements of the (213.8 nm) transition in Zn I using a cryog…
High-resolution isotope-shift spectroscopy of Cd I
Simon Hofsäss, J. Eduardo Padilla-Castillo, Sid C. Wright +6
We present absolute frequency measurements of the (nm) and (nm) transitions…
Cryogenic Buffer Gas beams of AlF, CaF, MgF, YbF, Al, Ca, Yb and NO -- a comparison
Sidney C. Wright, Maximilian Doppelbauer, Simon Hofsäss +4
Cryogenic buffer gas beams are central to many cold molecule experiments. Here, we use absorption and fluorescence spectroscopy to directly compare molecular beams of AlF, CaF, MgF…
Isotope Shifts in Cadmium as a Sensitive Probe for Physics Beyond the Standard Model
B. Ohayon, S. Hofsäss, J. E. Padilla-Castillo +5
Isotope shifts (ISs) in atomic energy levels are sensitive probes of nuclear structure and new physics beyond the Standard Model. We present an analysis of the ISs of the cadmium a…
The chemistry of AlF and CaF production in buffer gas sources
X. Liu, W. Wang, S. C. Wright +4
In this work, we explore the role of chemical reactions on the properties of buffer gas-cooled molecular beams. In particular, we focus on scenarios relevant to the formation of Al…
Spectroscopic characterization of singlet-triplet doorway states of aluminum monofluoride
Nicole Walter, Johannes Seifert, Stefan Truppe +3
Aluminum monofluoride (AlF) possesses highly favorable properties for laser cooling, both via the A and a states. Determining efficient pathways between the singlet and t…
Hyperfine resolved optical spectroscopy of the AX transition in MgF
M. Doppelbauer, S. C. Wright, S. Hofsäss +3
We report on hyperfine-resolved laser spectroscopy of the AX transition of MgF, relevant for laser cooling. We recorded 25 rotational transitions with an abs…
Dynamics of translational and rotational thermalization of AlF molecules via collisions with cryogenic helium
Mallikarjun Karra, Miruna T. Cretu, Bretislav Friedrich +3
We investigated helium-mediated translational and rotational thermalization of the aluminum monofluoride (AlF) molecule at cryogenic temperatures via a new potential…
Optical cycling of AlF molecules
Simon Hofsäss, Maximilian Doppelbauer, Sid Wright +5
Aluminium monofluoride (AlF) is a promising candidate for laser cooling and trapping at high densities. We show efficient production of AlF in a bright, pulsed cryogenic buffer gas…
Characterisation of the State and Its Interaction with the State in Aluminium Monofluoride
Maximilian Doppelbauer, Nicole Walter, Simon Hofsäss +7
Recently, we determined the detailed energy level structure of the , and states of AlF that are relevant to laser cooling and trapping experiments. Here, we i…
Spectroscopic characterization of aluminum monofluoride with relevance to laser cooling and trapping
S. Truppe, S. Marx, S. Kray +7
Here we report on spectroscopic measurements of the aluminum monofluoride molecule (AlF) that are relevant to laser cooling and trapping experiments. We measure the detailed energy…
Magnetic trapping and coherent control of laser-cooled molecules
H. J. Williams, L. Caldwell, N. J. Fitch +5
We demonstrate coherent microwave control of the rotational, hyperfine and Zeeman states of ultracold CaF molecules, and the magnetic trapping of these molecules in a single, selec…
A buffer gas beam source for short, intense and slow molecular pulses
S. Truppe, M. Hambach, S. M. Skoff +6
Experiments with cold molecules usually begin with a molecular source. We describe the construction and characteristics of a cryogenic buffer gas source of CaF molecules. The sourc…
Characteristics of a magneto-optical trap of molecules
H. J. Williams, S. Truppe, M. Hambach +5
We present the properties of a magneto-optical trap (MOT) of CaF molecules. We study the process of loading the MOT from a decelerated buffer-gas-cooled beam, and how best to slow…
Molecules cooled below the Doppler limit
S. Truppe, H. J. Williams, M. Hambach +5
The ability to cool atoms below the Doppler limit -- the minimum temperature reachable by Doppler cooling -- has been essential to most experiments with quantum degenerate gases, o…
An intense, cold, velocity-controlled molecular beam by frequency-chirped laser slowing
S. Truppe, H. J. Williams, N. J. Fitch +5
Using frequency-chirped radiation pressure slowing, we precisely control the velocity of a pulsed CaF molecular beam down to a few m/s, compressing its velocity spread by a factor…
A high quality, efficiently coupled microwave cavity for trapping cold molecules
D. P. Dunseith, S. Truppe, R. J. Hendricks +3
We characterize a Fabry-Perot microwave cavity designed for trapping atoms and molecules at the antinode of a microwave field. The cavity is fed from a waveguide through a small co…
Vibrational branching ratios and hyperfine structure of BH and its suitability for laser cooling
R. J. Hendricks, D. A. Holland, S. Truppe +2
The simple structure of the BH molecule makes it an excellent candidate for direct laser cooling. We measure the branching ratios for the decay of the state to…
Microwave spectroscopy of Lambda-doublet transitions in the ground state of CH
S. Truppe, R. J. Hendricks, S. K. Tokunaga +2
The Lambda-doublet transitions in CH at 3.3 and 0.7 GHz are unusually sensitive to variations in the fine-structure constant and the electron-to-proton mass ratio. We describe meth…
Measurement of the lowest millimetre-wave transition frequency of the CH radical
S. Truppe, R. J. Hendricks, E. A. Hinds +1
The CH radical offers a sensitive way to test the hypothesis that fundamental constants measured on earth may differ from those observed in other parts of the universe. The startin…
A search for varying fundamental constants using Hz-level frequency measurements of cold CH molecules
S. Truppe, R. J. Hendricks, S. K. Tokunaga +5
Many modern theories predict that the fundamental constants depend on time, position, or the local density of matter. We develop a spectroscopic method for pulsed beams of cold mol…
Wave and Particle in Molecular Interference Lithography
Thomas Juffmann, Stefan Truppe, Philipp Geyer +4
The wave-particle duality of massive objects is a cornerstone of quantum physics and a key property of many modern tools such as electron microscopy, neutron diffraction or atom in…