We report on measurements of the anisotropic dynamical polarizability of Dy near the 626-nm intercombination line, employing modulation spectroscopy in a one-dimensional optical lattice. To eliminate large systematic uncertainties resulting from the limited knowledge of the spatial intensity distribution, we use K as a reference species with accurately known polarizability. This method can be applied independently of the sign of the polarizability, i.e., for both attractive and repulsive optical fields on both sides of a resonance. By variation of the laser polarization we extract the scalar and the tensorial part. To characterize the strength of the transition, we also derive the natural linewidth. We find our result to be in excellent agreement with literature values, which provide a sensitive benchmark for the accuracy of our method. In addition we demonstrate optical dipole trapping on the intercombination line, confirming the expected long lifetimes and low heating rates. This provides an additional tool to tailor optical potentials for Dy atoms and for the species-specific manipulation of atoms in the Dy-K mixture.

中文翻译：

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在 626 nm 结合线附近测量 Dy 原子的动态极化率

我们报告了在 626 纳米结合线附近使用调制光谱在一维光学晶格中测量 Dy 的各向异性动态极化率。为了消除由于空间强度分布的有限知识而导致的大的系统不确定性，我们使用 K 作为具有准确已知极化率的参考物种。该方法可以独立于极化率的符号而应用，即，用于共振两侧的吸引和排斥光场。通过激光偏振的变化，我们提取标量和张量部分。为了表征过渡的强度，我们还推导出自然线宽。我们发现我们的结果与文献值非常一致，这为我们方法的准确性提供了一个敏感的基准。此外，我们还展示了相互结合线上的光学偶极子俘获，证实了预期的长寿命和低加热速率。这提供了一个额外的工具来定制 Dy 原子的光学势和 Dy-K 混合物中原子的物种特异性操作。