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arXiv physics/0602109physics.atom-ph
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地球物理场范围内的调频光非线性磁光旋转

Nonlinear magneto-optical rotation with frequency-modulated light in the geophysical field range

V. Acosta, M. P. Ledbetter, S. M. Rochester, D. Budker, D. F. Jackson-Kimball, D. C. Hovde, W. Gawlik, S. Pustelny, J. Zachorowski

摘要:

最近的工作研究共振非线性磁光旋转(NMOR)相关的长寿命($τ\ts{rel} \sim 1 {\rm s}$)基态原子相干性已经证明了潜在的磁力灵敏度超过$10^{-11} {\rm G/\sqrt{Hz}}$小($\lesssim 1 {\rm μG}$)磁场。在目前的工作中,NMOR使用调频光(FM NMOR)的制度中的纵向磁场是在地球物理范围($\sim 500 {\rm mG}$),特别感兴趣的许多应用程序进行了研究。在这种情况下,由于非线性塞曼效应的FM NMOR共振分裂观察。在足够高的光强度,也有一个分裂的FM NMOR共振由于交流斯塔克位移诱导的光场,以及证据的取向转换类型的过程。这些影响的后果FM-NMOR为基础的原子磁力在地球物理场范围内被认为是。

英文摘要:

Recent work investigating resonant nonlinear magneto-optical rotation (NMOR) related to long-lived ($τ\ts{rel} \sim 1 {\rm s}$) ground-state atomic coherences has demonstrated potential magnetometric sensitivities exceeding $10^{-11} {\rm G/\sqrt{Hz}}$ for small ($\lesssim 1 {\rm μG}$) magnetic fields. In the present work, NMOR using frequency-modulated light (FM NMOR) is studied in the regime where the longitudinal magnetic field is in the geophysical range ($\sim 500 {\rm mG}$), of particular interest for many applications. In this regime a splitting of the FM NMOR resonance due to the nonlinear Zeeman effect is observed. At sufficiently high light intensities, there is also a splitting of the FM NMOR resonances due to ac Stark shifts induced by the optical field, as well as evidence of alignment-to-orientation conversion type processes. The consequences of these effects for FM-NMOR-based atomic magnetometry in the geophysical field range are considered.

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