Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 61: SYCM: Contributed talks for the Symposium Hot topics in cold molecules: From laser cooling to quantum resonances
Q 61.3: Talk
Friday, March 13, 2020, 14:30–14:45, e415
Spectroscopic studies on the lowest triplet states of AlF — •Nicole Walter1, Silvio Marx1, Maximilian Doppelbauer1, Jesús Pérez-Ríos1, Boris Sartakov2, Sebastian Kray1, Simon Hofsäss1, Christian Schewe1, Stefan Truppe1, and Gerard Meijer1 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin — 2General Physics Institute, Russian Academy of Sciences, Vavilovstreet 38, 119991 Moscow, Russia
Aluminum monofluoride (AlF) is an excellent candidate for laser cooling. The spin-forbidden a3Π - X1Σ+ transition can be used to achieve final temperatures in the low µK range.
The metastable a-state allows high spectral resolution due to its long lifetime (∼ 1 ms). Using a jet-cooled, pulsed molecular beam, rf-transitions between opposite parity Λ-doublet levels are measured. We observe Rabi-lineshapes narrower than 1.5 kHz. By increasing the interaction time of the molecules with the rf-field, lines narrower than the natural linewidth can be obtained.
The parity selective detection of AlF in the a-state is done by resonant ionization via the b3Σ+ or c3Σ+-state. For this, we measure rotational-resolved spectra of all the involved states. Furthermore, the predicted lifetimes of the a, b and c-states are experimentally verified.