Sub-Doppler laser cooling of potassium atoms
Atomic Physics
2023-07-20 v1 Quantum Gases
Abstract
We investigate sub-Doppler laser cooling of bosonic potassium isotopes, whose small hyperfine splitting has so far prevented cooling below the Doppler temperature. We find instead that the combination of a dark optical molasses scheme that naturally arises in this kind of systems and an adiabatic ramping of the laser parameters allows to reach sub-Doppler temperatures for small laser detunings. We demonstrate temperatures as low as 25(3)microK and 47(5)microK in high-density samples of the two isotopes 39K and 41K, respectively. Our findings will find application to other atomic systems.
Keywords
Cite
@article{arxiv.1107.2337,
title = {Sub-Doppler laser cooling of potassium atoms},
author = {M. Landini and S. Roy and L. Carcagni' and D. Trypogeorgos and M. Fattori and M. Inguscio and G. Modugno},
journal= {arXiv preprint arXiv:1107.2337},
year = {2023}
}
Comments
7 pages, 9 figures