0000000000877186
AUTHOR
Niels Petersen
Spectroscopy of the 1001-nm transition in atomic dysprosium
We report on spectroscopy of cold dysprosium atoms on the $1001\text{\ensuremath{-}}\mathrm{nm}$ transition and present measurements of the excited-state lifetime which is at least $87(7)\phantom{\rule{4pt}{0ex}}\mathrm{ms}$ long. Due to the long excited-state lifetime we are able to measure the ratio of the excited-state polarizability to the ground-state polarizability at $1064\phantom{\rule{4pt}{0ex}}\mathrm{nm}$ to be 0.83(0.13) by parametric heating in an optical dipole trap. In addition we measure the isotope shifts of the three most abundant bosonic isotopes of dysprosium on the $1001\text{\ensuremath{-}}\mathrm{nm}$ transition with an accuracy better than $30\phantom{\rule{4pt}{0ex}…
Sawtooth-wave adiabatic-passage slowing of dysprosium
We report on sawtooth wave adiabatic passage (SWAP) slowing of bosonic and fermionic dysprosium isotopes by using a 136 kHz wide transition at 626 nm. A beam of precooled atoms is further decelerated in one dimension by the SWAP force and the amount of atoms at near zero velocity is measured. We demonstrate that the SWAP slowing can be twice as fast as in a conventional optical molasses operated on the same transition. In addition, we investigate the parameter range for which the SWAP force is efficiently usable in our set-up, and relate the results to the adiabaticity condition. Furthermore, we add losses to the hyperfine ground-state population of fermionic dysprosium during deceleration …