Precision spectroscopy by photon-recoil signal amplification
Precision spectroscopy by photon-recoil signal amplification
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DOI：
10.1038/ncomms4096
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发表时间：
2013-09
影响因子：
16.6
通讯作者：
Y. Wan;F. Gebert;Jannes Wübbena;N. Scharnhorst;Sana Amairi;I. Leroux;Börge Hemmerling;N. Lörch;K. Hammerer;P. Schmidt
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文献类型：
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作者：
Y. Wan;F. Gebert;Jannes Wübbena;N. Scharnhorst;Sana Amairi;I. Leroux;Börge Hemmerling;N. Lörch;K. Hammerer;P. Schmidt
原子和分子离子的精密光谱学为新物理学提供了一个窗口，但通常仅限于激光冷却和检测的循环跃迁物种。量子逻辑光谱学已经克服了长寿命激发态物种的这一限制。在这里，我们将量子逻辑光谱扩展到快速、偶极允许的跃迁，并应用它来执行绝对频率测量。我们检测光子的吸收光谱研究的离子通过光子反冲赋予一个共同捕获的不同物种的离子，我们可以执行有效的量子逻辑检测技术。这将反冲信号从几个吸收的光子放大到数千个荧光光子。我们解决了线中心的偶极允许过渡在40钙+到1/300的观察线宽，使这种测量的最准确的一个广泛的过渡。这种方法的简单性和多功能性使许多以前无法获得的物种的光谱。
Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome this limitation for species with long-lived excited states. Here we extend quantum logic spectroscopy to fast, dipole-allowed transitions and apply it to perform an absolute frequency measurement. We detect the absorption of photons by the spectroscopically investigated ion through the photon recoil imparted on a co-trapped ion of a different species, on which we can perform efficient quantum logic detection techniques. This amplifies the recoil signal from a few absorbed photons to thousands of fluorescence photons. We resolve the line centre of a dipole-allowed transition in40Ca+to 1/300 of its observed linewidth, rendering this measurement one of the most accurate of a broad transition. The simplicity and versatility of this approach enables spectroscopy of many previously inaccessible species.