Coherence-assisted resonance with sub-transit-limited linewidth.
Coherence-assisted resonance with sub-transit-limited linewidth.
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DOI：
10.1103/physrevlett.109.233006
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发表时间：
2012-08
影响因子：
8.6
通讯作者：
Lei Feng;Pengxiong Li;Liang Jiang;J. Wen;Yanhong Xiao
中科院分区：
文献类型：
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作者：
Lei Feng;Pengxiong Li;Liang Jiang;J. Wen;Yanhong Xiao
我们展示了一种新的方法来获得低于过境限制的共振线宽。两束激光与靶共振耦合产生的感生强度调制之间的互相关具有很窄的光谱。在两个基态为目标共振能级的原理验证实验中实现了1/30的渡越限制宽度。理论上，吸收谱线宽度只受散粒噪声的限制。实验结果与直观的分析模型和数值计算定性一致。这种技术可以很容易地实现，并应适用于许多原子，分子和固态自旋系统的光谱学，计量学和共振为基础的传感和成像。
We demonstrate a novel approach to obtain a resonance linewidth below the transit limit. The cross correlation between the induced intensity modulation of two lasers coupling the target resonance exhibits a narrow spectrum. 1/30 of the transit-limited width is achieved in a proof-of-principle experiment where two ground states are the target resonance levels. Attainable linewidth is only limited by laser shot noise in principle. The experimental results qualitatively agree with an intuitive analytical model and numerical calculations. This technique can be easily implemented and should be applicable to many atomic, molecular, and solid state spin systems for spectroscopy, metrology, and resonance-based sensing and imaging.