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提出了采用四台阶相位光栅与微透镜阵列组合产生一种新颖的表面空心微光阱阵列的方案,研究了表面空心微光阱阵列的光强分布,计算了相应的光学囚禁势,并讨论了该微光阱阵列在原子分子光学中的潜在应用.研究表明当用1W的YAG激光照射时,在1cm2面积上可产生近104个空心光阱,每个光阱具有较小的囚禁体积和较大的有效光强及其强度梯度,对85Rb原子的光学囚禁势可达190μK.如此深的光阱足以囚禁冷原子或冷分子,并可用于实现全光型原子或分子玻色-爱因斯坦凝聚,甚至制备新颖的光学晶格等.
A new scheme of combining four-step phase grating and microlens array to produce a novel surface hollow micro-well trap is proposed. The light intensity distribution of the surface hollow micro-well trap array is studied, and the corresponding optical trap potential is calculated. The potential application of the micro-well trap array in atomic-molecular optics has shown that when irradiated with a 1-W YAG laser, nearly 104 hollow light traps can be generated in an area of 1 cm 2, each trap has a smaller trapping volume and a smaller Large effective light intensity and its intensity gradient, the optical trapped power of 85Rb atoms can reach 190μ K. Such a deep light trap is enough to trap cold atoms or cold molecules, and can be used to achieve all-optical atoms or molecules Bose - Einstein Condensation, and even the preparation of new optical lattice and so on.