We report on a new scheme for loading dysprosium atoms into a three-dimensional magneto-optical trap (3D MOT) working on the narrow 626-nm intercombination line. Our innovative approach replaces the conventional Zeeman slower with a 2D MOT operating on the broad 421-nm line to create a high-flux beam of slow atoms. Even in the absence of a push beam, we demonstrate efficient loading of the 3D MOT. Adding push beams working at either 421 nm and 626 nm, significant enhancement of the loading rate is achieved. We reach the best performance, with an enhancement factor of 3.6, using a push beam red detuned to the 626-nm line. With loading rates greater than 108 atoms/s achieved at a moderate oven reservoir temperature of 800∘C, our method offers similar or greater performance than Zeeman-slower-based systems. Our 2D-MOT-based approach constitutes a promising first step for state-of-the-art quantum gas experiments with several advantages over the Zeeman-slower-based setup and is readily adaptable to other open-shell lanthanides.
S. Jin, J. Gao, K. Chandrashekara, C. Gölzhäuser, J. Schöner, L. Chomaz, “A 2D MOT of dysprosium atoms as a compact source for efficient loading of a narrow-line 3D MOT”, arXiv:2303.05191 (2023).
Related to Project A07