论文标题
在定期泵式砷化甘氨酸中，光学鲜明效应动态核极化
Dynamic Nuclear Polarization by optical Stark effect in periodically-pumped gallium arsenide
论文作者
论文摘要
光学泵探针时间和磁场分辨的Kerr旋转测量值为产生大量砷化炮的动态核极化的机制提供了一个窗口。以前，我们报告了核极化方向在施加的外部磁场的扫描方向上的意外依赖性。在本文中，我们介绍了基于该核极化模型的数值计算，这是由于通过一系列超快光脉冲产生的光学取向和光学鲜明效应。我们证明了该模型与我们的实验测量的对应关系，以实验不同激光波长和磁场扫描速率。最后，我们表明该模型重现了扫描方向依赖性，并为此行为提供了解释。
Optical pump-probe time- and magnetic-field-resolved Kerr rotation measurements provide a window into the mechanisms that generate dynamic nuclear polarization in bulk gallium arsenide. Previously, we have reported an unexpected dependence of the direction of the nuclear polarization on the sweep direction of the applied external magnetic field. In this paper, we present numerical calculations based on a model for this nuclear polarization due to the optical orientation and optical Stark effect produced by a train of ultrafast optical pulses. We demonstrate the correspondence of the model to our experimental measurements for different laser wavelengths and magnetic field sweep rates. Finally, we show that the model reproduces the sweep direction dependence and provides an explanation for this behavior.
