Magneto-Optical Properties of Paramagnetic Superrotors.
Magneto-Optical Properties of Paramagnetic Superrotors.
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DOI：
10.1103/physrevlett.115.033005
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发表时间：
2014-10
影响因子：
8.6
通讯作者：
A. Milner;A. Korobenko;J. Floß;I. Averbukh;V. Milner
中科院分区：
文献类型：
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作者：
A. Milner;A. Korobenko;J. Floß;I. Averbukh;V. Milner
本文研究了顺磁分子超级转子在外加磁场下的动力学。光学离心机用于在超高旋转状态下制造密集的氧分子集合。这是第一次表明，旋转分子的气体在磁场存在下成为光学双折射。发现的“磁-旋转双折射”效应表明分子轴沿磁场方向优先排列。我们提供了一个直观的定性模型，其中外加磁场对分子取向的影响是通过自旋-旋耦合介导的。该模型得到了分子轴分布的直接成像、旋转拉曼信号磁反转的证明和数值计算的支持。
We study the dynamics of paramagnetic molecular superrotors in an external magnetic field. An optical centrifuge is used to create dense ensembles of oxygen molecules in ultrahigh rotational states. In is shown, for the first time, that the gas of rotating molecules becomes optically birefringent in the presence of a magnetic field. The discovered effect of "magneto-rotational birefringence" indicates the preferential alignment of molecular axes along the field direction. We provide an intuitive qualitative model, in which the influence of the applied magnetic field on the molecular orientation is mediated by the spin-rotation coupling. This model is supported by the direct imaging of the distribution of molecular axes, the demonstration of the magnetic reversal of the rotational Raman signal, and by numerical calculations.