Freiburg 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MO: Fachverband Molekülphysik
MO 17: Poster: Cold Molecules
MO 17.7: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent C
Microwave spectroscopy of cold CH3F molecules in a microstructured electrostatic trap — •Jindaratsamee Phrompao, Florian Jung, Manuel Koller, Martin Zeppenfeld, Isabel Rabey, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
Polar molecules exhibit strong interaction with an external electric field as well as long-range and anisotropic interaction between themselves. These offer fascinating research opportunities ranging from quantum chemistry to quantum computation. Motivated by these, cooling techniques are improving rapidly to prepare cold and ultracold molecular ensembles. To perform the cooling, information about the rotational state distribution and trapping fields is crucial for theoretical and practical considerations, addressability and controllability of the molecules.
In our experiment [1], we employ state-selective depletion by using only microwaves to determine the rotational M-substate population of cold CH3F molecules in an electrostatic trap [2]. The used trap provides a strongly-peaked and narrow electric-field distribution. While driving one transition resonantly on the peak of the distribution, other transitions can be driven resonantly in higher or lower fields in the wings of the distribution. This renders direct observation of the electric-field distribution difficult. However, by choosing a suitable transition measurement of the distribution via depletion dynamics seems possible. Preliminary data are presented on the poster.
[1] M. Koller et al., Phys. Rev. Lett. 128, 203401 (2022).
[2] B. G. U. Englert et al., Phys. Rev. Lett. 107, 263003 (2011).
Keywords: Cold molecules; Polyatomic molecules; Electric-field distribution; Rotational state distribution; Microwave depletion