Establishing a nearly closed cycling transition in a polyatomic molecule
Establishing a nearly closed cycling transition in a polyatomic molecule
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DOI：
10.1103/physreva.103.043111
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发表时间：
2021-04-15
影响因子：
2.9
通讯作者：
Doyle, John M.
中科院分区：
文献类型：
--
作者：
Baum, Louis;Vilas, Nathaniel B.;Doyle, John M.
我们研究了极性自由基氢氧化钙(CaOH)的光学循环，并建立了类似于10(4)光子的散射实验路径。我们报告了类似于10(-4)能级的振子分支比的精确测量，并观察到非零振动角动量的弯曲模的弱对称禁止衰变。计算结果与这些测量结果很好地吻合，并预测了额外的衰变路径。此外，我们还研究了(CHI)在Tide(2)Sigma+(12(0)0)和(CHI)在Tide(2)Sigma(+)(12(2)0)混合振动态上的高分辨光谱。这些进展建立了一条通往辐射减慢、三维磁光俘获和亚多普勒冷却CaOH的途径。
We study optical cycling in the polar free radical calcium monohydroxide (CaOH) and establish an experimental path towards scattering similar to 10(4) photons. We report rovibronic branching ratio measurements with precision at the similar to 10(-4) level and observe weak symmetry-forbidden decays to bending modes with nonzero vibrational angular momentum. Calculations are in excellent agreement with these measurements and predict additional decay pathways. Additionally, we perform high-resolution spectroscopy of the (Chi) over tilde (2) Sigma+(12(0)0) and (Chi) over tilde (2) Sigma(+) (12(2)0) hybrid vibrational states of CaOH. These advances establish a path towards radiative slowing, three-dimensional magneto-optical trapping, and sub-Doppler cooling of CaOH.