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arXiv physics/9912002physics.atom-ph
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基于电子搁置的暗光阱高灵敏度双光子光谱学

High sensitivity two-photon spectroscopy in a dark optical trap, based on electron shelving

L. Khaykovich, N. Friedman, S. Baluschev, D. Fathi, N. Davidson

摘要:

我们提出了一种新的光谱方法来测量冷原子和被困原子中的弱跃迁,该方法利用了暗光阱提供的长相互作用时间和紧密限制,以及电子搁置技术来实现极高的灵敏度。我们用25微瓦的微弱探测激光测量了一个新的单光束暗光阱中冷Rb原子的5 S_{1/2} -> 5 D_{5/2}双光子跃迁。我们能够以0.09秒^(-1)的小激发速率测量跃迁。

英文摘要:

We propose a new spectroscopic method for measuring weak transitions in cold and trapped atoms, which exploits the long interaction times and tight confinement offered by dark optical traps together with an electron shelving technique to achieve extremely high sensitivity. We demonstrate our scheme by measuring a 5S_{1/2}-> 5D_{5/2} two-photon transition in cold Rb atoms trapped in a new single-beam dark optical trap, using an extremely weak probe laser power of 25 micro-Watt. We were able to measure transitions with as small excitation rate as 0.09 sec^(-1).

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