论文标题
Terahertz-Magnetic-Field诱导的分子液体的超快法拉第旋转
Terahertz-Magnetic-Field Induced Ultrafast Faraday Rotation of Molecular Liquids
论文作者
论文摘要
在存在磁场（称为法拉第旋转）的情况下，光的平面旋转是光的电磁性质的结果，并且已在许多光学设备中使用。当前的努力旨在在次秒时尺度上实现超快的法拉第旋转。因此，法拉第介质应允许超快过程，在存在超短磁场的情况下，光偏振旋转。我们通过将强烈的单个循环THZ磁场应用于简单的分子液体来符合这些标准，并证明光脉冲的偏振平面在次秒时尺度上横穿液体的光脉冲旋转。该效果归因于在THZ磁场影响下光学诱导的瞬时电化极化的挠度。解决的法拉第旋转与THZ磁场线性缩放，并用分子极化次数倍增。
Rotation of the plane of the polarization of light in the presence of a magnetic-field, known as the Faraday rotation, is a consequence of the electromagnetic nature of light and has been utilized in many optical devices. Current efforts aim to realize the ultrafast Faraday rotation on a sub-picosecond time scale. Thereby, the Faraday medium should allow an ultrafast process by which in the presence of an ultrashort intense magnetic-field, the light polarization rotates. We meet these criteria by applying an intense single cycle THz magnetic-field to simple molecular liquids and demonstrate the rotation of the plane of polarization of an optical pulse traversing the liquids on a sub-picosecond time scale. The effect is attributed to the deflection of an optically induced instantaneous electric polarization under the influence the THz magnetic-field. The resolved Faraday rotation scales linearly with the THz magnetic-field and quadratically with the molecular polarizability.
