Creating cold stationary molecular gases by optical Stark deceleration
Creating cold stationary molecular gases by optical Stark deceleration
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DOI：
10.1088/1367-2630/12/7/073028
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发表时间：
2010-07
影响因子：
3.3
通讯作者：
A. Bishop;L. Wang;P. Barker
中科院分区：
文献类型：
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作者：
A. Bishop;L. Wang;P. Barker
利用电场和磁场使分子从冷分子束中减速已经成为产生静止、冷偶极或顺磁分子气体的重要手段，这些气体可以被捕获并有可能冷却到μK范围内的超冷温度。我们报告了一种利用强光场对冷分子束进行减速以产生基本上任何类型的冷分子的一般方案。苯分子的减速到零速度是通过利用单个半振荡的质心运动的分子在移动的光学晶格内实现的。以分子束一半速度运动的晶格是由两个不同频率的近反向传播场的干涉产生的。我们证明，通过在大约半振荡所需的时间内快速打开光学晶格，一束大约105个苯分子可以快速减速并在实验室框架中静止。
The deceleration of molecules from cold molecular beams using electric and magnetic fields has become an important means for producing stationary, cold dipolar or paramagnetic molecular gases that can be trapped and potentially cooled to ultra-cold temperatures in the μK range. We report on a general scheme for the creation of cold molecules of essentially any type by deceleration of a cold molecular beam using intense optical fields. Deceleration of benzene molecules to zero velocity is achieved by utilizing a single half oscillation of the center-of-mass motion of the molecules within a moving optical lattice. The lattice traveling at half the speed of the molecular beam is created by the interference of two near-counter-propagating fields at different frequencies. We show that by rapidly switching on the optical lattice for approximately the time required for a half oscillation, a bunch of approximately 105 benzene molecules can be rapidly decelerated and brought to rest in the laboratory frame.