Number-resolved imaging of excited-state atoms using a scanning autoionization microscope
Number-resolved imaging of excited-state atoms using a scanning autoionization microscope
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DOI：
10.1103/physreva.87.053409
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发表时间：
2012-12
影响因子：
2.9
通讯作者：
G. Lochead;D. Boddy;D. P. Sadler;C. Adams;M.P.A. Jones
中科院分区：
文献类型：
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作者：
G. Lochead;D. Boddy;D. P. Sadler;C. Adams;M.P.A. Jones
我们报道了一种用于激发态原子原子数分辨成像的扫描显微镜技术。紧密聚焦的激光束导致局部自电离，产生的离子被电子计数。扫描光束穿过云，建立了激发原子密度分布的图像，可以访问每个空间采样点的完整计数统计数据，总体检测效率为21%。我们将该技术应用于空间非均匀电场的测量，其空间分辨率为50 μ m，对电场梯度的灵敏度为0.04 V cm−2。
We report on a scanning microscopy technique for atom-number-resolved imaging of excited-state atoms. A tightly focused laser beam leads to local autoionization and the resulting ions are counted electronically. Scanning the beam across the cloud builds up an image of the density distribution of excited atoms, with access to the full counting statistics at each spatial sampling point and an overall detection efficiency of 21% . We apply this technique to the measurement of a spatially inhomogeneous electric field with a spatial resolution of 50 μ m and a sensitivity to electric-field gradients of 0.04 V cm −2 .