Optical repumping of triplet $P$-states enhances magneto-optical trapping of ytterbium atoms

Abstract

Radiative decay from the excited ${}^1{P}_1$ state to metastable ${}^3{P}_2$ and ${}^3{P}_0$ states is expected to limit attainable trapped atomic population in a magneto-optic trap of ytterbium (Yb) atoms. In experiments we have carried out with optical repumping of ${}^3{P}_{0,2}$ states to ${}^3{P}_1$, we observe enhancement of trapped atoms yield in the excited ${}^1{P}_1$ state. The individual decay rate to each metastable state is measured and the results show an excellent agreement with the theoretical values.

5 pages, 5 figures

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