Laser cooling and slowing of CaF molecules
Laser cooling and slowing of CaF molecules
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CaF分子的激光冷却和减慢
DOI：
10.1103/physreva.89.053416
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发表时间：
2014
影响因子：
2.9
通讯作者：
Zhelyazkova V
中科院分区：
文献类型：
--
作者：
Zhelyazkova V
我们展示了使用具有闭合旋转和几乎闭合振动跃迁的反向传播激光谐振对 CaF 分子超音速束的减慢和纵向冷却。通过施加固定频率的光 1.8 毫秒，一组分子减速约 20 m/s。它们的速度分布减小，对应于约 300 mK 的最终温度。当分子减慢速度时，通过调频光的频率使其保持共振，从而进一步降低速度。
We demonstrate slowing and longitudinal cooling of a supersonic beam of CaF molecules using counterpropagating laser light resonant with a closed rotational and almost-closed vibrational transition. A group of molecules are decelerated by about 20 m/s by applying light of a fixed frequency for 1.8 ms. Their velocity spread is reduced, corresponding to a final temperature of about 300 mK. The velocity is further reduced by chirping the frequency of the light to keep it in resonance as the molecules slow down.