激光冷却线性多原子分子的振转分支比的精确预测与测量。
Accurate prediction and measurement of vibronic branching ratios for laser cooling linear polyatomic molecules.
作者信息
Zhang Chaoqun, Augenbraun Benjamin L, Lasner Zack D, Vilas Nathaniel B, Doyle John M, Cheng Lan
机构信息
Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, USA.
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
出版信息
J Chem Phys. 2021 Sep 7;155(9):091101. doi: 10.1063/5.0063611.
We report a generally applicable computational and experimental approach to determine vibronic branching ratios in linear polyatomic molecules to the 10 level, including for nominally symmetry-forbidden transitions. These methods are demonstrated in CaOH and YbOH, showing approximately two orders of magnitude improved sensitivity compared with the previous state of the art. Knowledge of branching ratios at this level is needed for the successful deep laser cooling of a broad range of molecular species.
我们报告了一种普遍适用的计算和实验方法，用于确定线性多原子分子中至10能级的振转分支比，包括名义上对称禁戒的跃迁。这些方法在CaOH和YbOH中得到了验证，与之前的技术水平相比，灵敏度提高了约两个数量级。对于广泛的分子种类成功进行深度激光冷却而言，需要了解这个能级的分支比。
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