Microwave electrometry via electromagnetically induced absorption in cold Rydberg atoms
Microwave electrometry via electromagnetically induced absorption in cold Rydberg atoms
复制标题
通过冷里德伯原子的电磁感应吸收进行微波静电测量
DOI：
10.1103/physreva.101.053432
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发表时间：
2020-05-21
影响因子：
2.9
通讯作者：
Zhu, Shi-Liang
中科院分区：
文献类型：
--
作者：
Liao, Kai-Yu;Tu, Hai-Tao;Zhu, Shi-Liang
基于原子的微波电测量可溯源标准具有稳定、均匀的测量优势。在这里，我们从理论上提出并实验实现了一种替代的直接国际单位制(SI)-可追溯和自校准的方法，用于测量基于冷里德伯原子中的电磁感应吸收（EIA）的微波电场强度。通过与电诱导透明方法的比较，我们发现微波Rabi频率与Autler-Townes分裂之间的等价关系在EIA的线性区域内对实验参数具有更强的鲁棒性。此外，较窄的冷里德堡EIA线宽使我们能够实现小至$\ensuremath{\sim}100\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{V}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$的直接si可追溯微波电场测量。
The atom-based traceable standard for microwave electrometry shows promising advantages by enabling stable and uniform measurement. Here we theoretically propose and then experimentally realize an alternative direct International System of Units (SI)--traceable and self-calibrated method for measuring a microwave-electric-field strength based on electromagnetically induced absorption (EIA) in cold Rydberg atoms. Comparing with the method of electromagnetically induced transparency, we show that the equivalence relation between the microwave Rabi frequency and Autler-Townes splitting is more valid and is even more robust against the experimental parameters in the EIA's linear region. Furthermore, a narrower linewidth of cold Rydberg EIA enables us to realize a direct SI-traceable microwave-electric-field measurement as small as $\ensuremath{\sim}100\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{V}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$.