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MO: Fachverband Molekülphysik
MO 26: Poster – Cold Molecules (joint session MO/Q)
MO 26.10: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Two Robust Methods for Extracting an Electric-Field Distribution from Microwave Depletion Spectra — •Philipp Heinrich, Florian Jung, Jindaratsamee Phrompao, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
Electrically trapped polyatomic polar molecules can be employed in a wide range of experiments, such as in the study of collisions, spectroscopy, and cooling. Towards this end, precise knowledge of the distribution of electric fields inside the trap is indispensable, because it determines spectroscopic lineshapes when driving microwave transitions. Thus, determining the electric-field distribution from spectroscopy measurements should be possible. However, a direct extraction of this property is rendered difficult, as in general more than one transition is resonant with a certain microwave frequency at different points inside the trap, i.e. in different electric fields.
Here, we present two robust and generic strategies to resolve this problem, each employing a different microwave transition. Microwave depletion spectra are obtained inside an electrostatic multipole trap using cold CH3F molecules loaded from a cryofuge source [1]. From those, the electric-field distribution in the trap is deduced and shown to be in good agreement with a simulated distribution. We discuss how the results obtained can be generalized to other types of electrostatic traps.
[1] M. Koller et al., Phys. Rev. Lett. 128, 203401 (2022).
Keywords: Electric-Field Distribution; Polyatomic Polar Molecules; Microwave Spectroscopy; Electrostatic Trapping; In-Trap Dynamics