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Q: Fachverband Quantenoptik und Photonik
Q 65: Poster – Cold Molecules (joint session MO/Q)
Q 65.13: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Towards magneto-optical trapping of molecules in the deep ultraviolet — •Lajos Palanki1, Jionghao Cai2, Carlos Alarcon-Robledo1, Caleb Rich1, Wei Wei Liu1, José Eduardo Padilla-Castillo2, Russel Thomas2, Gerard Meijer2, Sidney Wright2, and Stefan Truppe1,2 — 1Centre for Cold Matter, Imperial College London — 2Fritz Haber Institute, Berlin
In recent years, ultracold molecules have become a very promising platform for quantum information processing, studying quantum many-body physics and testing new physics beyond the Standard Model of particle physics.
Similar to alkaline earth (like) atoms (Yb, Sr, Cd) aluminium monofluoride (AlF), has a strong dipole-allowed transition (near 227.5 nm) to capture and cool a large number of molecules in a MOT and narrow spin-forbidden transitions for cooling to low temperatures in the µK range. This might allow trapping laser-cooled molecules at high enough densities to study collisions between the molecules and evaporative cooling to form a degenerate gas of polar molecules.
We present a new laser system based on Vertical External Cavity Surface Emitting Lasers (VECSELs) to generate high-power DUV light for laser cooling. We demonstrate its versatility by characterising the molecular source to produce an intense beam of AlF molecules and by capturing and cooling Cd atoms in a magneto-optical trap.
Keywords: Deep-ultraviolet; Second harmonic generation; Alkaline-earth like system