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相比于传统的红失谐偶极势阱,蓝移阱中原子在排斥势的作用下被囚禁在光强最弱的地方,有助于减弱光子散射率和激光对原子能级的光频移,从而使蓝移阱在单原子俘获和操控方面具有明显优势。在单原子俘获实验中,一般阱的尺寸在微米尺度,要小于通常CCD的像素尺寸,对微尺度光学阱的精密测量是构建单原子操控光学阱的重要一步。在本文中,我们利用特殊的透镜组将1.5μm大小的蓝移阱放大,再通过普通CCD获得x-y方向图像,重构出y-z和x-z方向阱的信息,进而获得了微尺度阱的三维结构,并对阱的参数进行了估算。
Compared with the traditional red-detuning dipole potential well, the atoms in the blue-shift trap are imprisoned in the weakest region under the repulsive potential, which helps to reduce the photon scattering rate and laser light frequency shift of the atomic level , Making the blue-shift trap a clear advantage in single-atom capture and manipulation. In monatomic capture experiments, the size of a typical well is smaller than that of a typical CCD in the micrometer scale. The precise measurement of a microscale optical well is an important step toward constructing a monatomic controlled optical trap. In this paper, we use a special lens group to zoom in on 1.5μm blue-shifted traps, obtain xy-directional images by ordinary CCD, reconstruct well information of yz and xz directions, and then obtain the 3D structure of micro-scale wells, The well parameters were estimated.