Publications (8)
Storage and Adiabatic Cooling of Polar Molecules in a Microstructured Trap
B. G. U. Englert, M. Mielenz, C. Sommer +5
We present a versatile electric trap for the exploration of a wide range of quantum phenomena in the interaction between polar molecules. The trap combines tunable fields, homogene…
Doppler-Free Spectroscopy of Weak Transitions: An Analytical Model Applied to Formaldehyde
M. Zeppenfeld, M. Motsch, P. W. H. Pinkse +1
Experimental observation of Doppler-free signals for weak transitions can be greatly facilitated by an estimate for their expected amplitudes. We derive an analytical model which a…
Assignment of resonances in dissociative recombination of HD+ ions: high-resolution measurements compared with accurate computations
F. O. Waffeu Tamo, H. Buhr, O. Motapon +16
The collision-energy resolved rate coefficient for dissociative recombination of HD+ ions in the vibrational ground state is measured using the photocathode electron target at the…
Sisyphus Cooling of Electrically Trapped Polyatomic Molecules
M. Zeppenfeld, B. G. U. Englert, R. Glöckner +6
The rich internal structure and long-range dipole-dipole interactions establish polar molecules as unique instruments for quantum-controlled applications and fundamental investigat…
Cold guided beams of water isotopologs
M. Motsch, L. D. van Buuren, C. Sommer +3
Electrostatic velocity filtering and guiding is an established technique to produce high fluxes of cold polar molecules. In this paper we clarify different aspects of this techniqu…
Opto-Electrical Cooling of Polar Molecules
M. Zeppenfeld, M. Motsch, P. W. H. Pinkse +1
We present an opto-electrical cooling scheme for polar molecules based on a Sisyphus-type cooling cycle in suitably tailored electric trapping fields. Dissipation is provided by sp…
Electrostatic extraction of cold molecules from a cryogenic reservoir
L. D. van Buuren, C. Sommer, M. Motsch +5
We present a method which delivers a continuous, high-density beam of slow and internally cold polar molecules. In our source, warm molecules are first cooled by collisions with a…
Internal-state thermometry by depletion spectroscopy in a cold guided beam of formaldehyde
M. Motsch, M. Schenk, L. D. van Buuren +3
We present measurements of the internal state distribution of electrostatically guided formaldehyde. Upon excitation with continuous tunable ultraviolet laser light the molecules d…