Stylus ion trap for enhanced access and sensing
Stylus ion trap for enhanced access and sensing
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DOI：
10.1038/nphys1311
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发表时间：
2009-08-01
期刊：
影响因子：
19.6
通讯作者：
Wineland, David J.
中科院分区：
文献类型：
--
作者：
Maiwald, Robert;Leibfried, Dietrich;Wineland, David J.
小的、可控的、高度可访问的量子系统可以作为单量子水平的探针来研究许多物理效应，例如在量子光学或电场和磁场传感中。捕获的原子离子作为探针的适用性高度依赖于手头的测量情况，因此需要专门的陷阱。用于具有增强的光学访问的离子阱的先前方法包括由单个环形电极（1，2）或两个相对的端盖电极（2，3）组成的阱。其他可能性是平面阱几何形状，其已被研究用于潘宁阱（4，5）和射频阱阵列（6-8）。通过使电极不位于公共平面中，可以显著增加光学访问。在这里，我们报告了一种新型的射频离子阱几何形状的制造和实验表征。它有一个相对简单的结构，并提供了很大程度上不受限制的光学和物理访问的离子，高达96%的总4 π立体角在一个测试的三个陷阱。这种陷阱可能在量子光学和场传感中得到应用。作为力传感器，我们估计对小于1 yN Hz（-1/2）的力的灵敏度。
Small, controllable, highly accessible quantum systems can serve as probes at the single-quantum level to study a number of physical effects, for example in quantum optics or for electric- and magnetic-field sensing. The applicability of trapped atomic ions as probes is highly dependent on the measurement situation at hand and thus calls for specialized traps. Previous approaches for ion traps with enhanced optical access included traps consisting of a single ring electrode(1,2) or two opposing endcap electrodes(2,3). Other possibilities are planar trap geometries, which have been investigated for Penning traps(4,5) and radiofrequency trap arrays(6-8). By not having the electrodes lie in a common plane, the optical access can be substantially increased. Here, we report the fabrication and experimental characterization of a novel radiofrequency ion trap geometry. It has a relatively simple structure and provides largely unrestricted optical and physical access to the ion, of up to 96% of the total 4 pi solid angle in one of the three traps tested. The trap might find applications in quantum optics and field sensing. As a force sensor, we estimate sensitivity to forces smaller than 1 yN Hz(-1/2).