Doppler Cooling Trapped Ions with a UV Frequency Comb
Doppler Cooling Trapped Ions with a UV Frequency Comb
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DOI：
10.1103/physrevlett.116.043002
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发表时间：
2016-01-26
影响因子：
8.6
通讯作者：
Udem, Thomas
中科院分区：
文献类型：
--
作者：
Davila-Rodriguez, Josue;Ozawa, Akira;Udem, Thomas
我们利用三倍频钛宝石激光器获得的280 nm频率梳，对俘获的镁离子进行了多普勒冷却。一条梳状线在3s(1/2)-3p(3/2)相变处冷却，而最近的蓝失谐梳状线对加热的贡献可以忽略不计。我们观察了具有多个共冷离子的离子链的冷热转变和长期冷却。空间测温表明，离子冷却到接近多普勒限。频率梳的多普勒冷却通过高次谐波的产生进一步深入真空和极端紫外线，并提供可以获得多个激发边带的宽带宽，从而有可能为激光冷却打开许多额外的原子物种。
We demonstrate Doppler cooling of trapped magnesium ions using a frequency comb at 280 nm obtained from a frequency tripled Ti:sapphire laser. A comb line cools on the 3s(1/2) - 3p(3/2) transition, while the nearest blue-detuned comb line contributes negligible heating. We observe the cooling-heating transition and long-term cooling of ion chains with several sympathetically cooled ions. Spatial thermometry shows that the ion is cooled to near the Doppler limit. Doppler cooling with frequency combs has the potential to open many additional atomic species to laser cooling by reaching further into the vacuum and extreme ultraviolet via high-harmonic generation and by providing a broad bandwidth from which multiple excitation sidebands can be obtained.