SAMOP 2023 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Collisions (joint session MO/Q)
MO 10.5: Vortrag
Mittwoch, 8. März 2023, 15:30–15:45, F142
Two-photon optical shielding of collisions between ultracold polar molecules. — •Charbel Karam1, Mara Meyer zum Alten Borgloh3, Romain Vexiau1, Maxence Lepers2, Silke Ospelkaus3, Nadia Bouloufa-Maafa1, Leon Karpa3, and Olivier Dulieu1 — 1Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, Orsay 91400, France — 2Laboratoire interdisciplinaire Carnot de Bourgogne, Cedex F-21075 Dijon, France — 3Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover, Germany
We propose a method to engineer repulsive long-range interactions between ultracold ground-state molecules using optical fields, thus preventing short-range collisional losses. It maps the microwave coupling recently used for collisional shielding onto a two-photon transition, and takes advantage of optical control techniques. In contrast to one-photon optical shielding [Phys. Rev. Lett. 125, 153202 (2020)], this scheme avoids heating of the molecular gas due to photon scattering. The proposed protocol, exemplified for 23Na39K, should be applicable to a large class of polar diatomic molecules.