Generation of one- or two-dimensional arrays of hollow optical microtraps for cold atoms, molecules, or microparticles on a chip
Generation of one- or two-dimensional arrays of hollow optical microtraps for cold atoms, molecules, or microparticles on a chip
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DOI：
10.1364/josab.26.000080
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发表时间：
2009
影响因子：
1.9
通讯作者：
R. Mu;J. Lu;Shuwu Xu;X. Ji.;J. Yin
中科院分区：
文献类型：
--
作者：
R. Mu;J. Lu;Shuwu Xu;X. Ji.;J. Yin
我们提出了一种新的方案，通过使用由四步相位光栅和二维微透镜阵列组成的光学系统，在芯片上形成冷原子、分子或显微粒子的一维或二维空心光学微阱阵列。计算了空心光学微阱二维阵列的光强分布及其在85Rb原子中的光势，并讨论了其在原子和分子光学中的潜在应用。我们的研究表明，当我们的光学系统被1w的Ti：蓝宝石激光器照射时，可以产生103个空心光学微阱。每个光学微阱的捕获体积小，有效强度高，其强度梯度和85Rb原子的光偶极子势可达167 μK。通过调整光学系统的参数，可以改变每个光学微阱的特征参数，从而满足各种实验操作和控制冷原子、分子或显微粒子的实际需要。
We propose a new scheme to form 1D or 2D arrays of hollow optical microtraps for cold atoms, molecules, or microscopy particles on a chip by using an optical system composed of a four-step phase grating and a 2D array of microlenses. We calculate the intensity distribution of the 2D array of the hollow optical microtraps and its optical potential for 85Rb atoms and discuss its potential applications in atom and molecule optics. Our study shows that when our optical system is illuminated by a 1 W Ti:Sapphire laser, 103 hollow optical microtraps can be generated. Each optical microtrap has a small trapping volume and a high effective intensity, and its intensity gradient and the optical dipole potential for 85Rb atoms can reach 167 μK. Characteristic parameters of each optical microtrap can be changed by adjusting the parameters of our optical system, which can be used to satisfy real needs of various experiments to manipulate and control cold atoms, molecules, or microscopy particles.