论文标题
通过光学离心机控制分子框架的旋转
Controlling rotation in the molecular-frame with an optical centrifuge
论文作者
论文摘要
我们在计算上证明了一种新方法，可以通过光学离心机连贯控制不对称顶部分子的旋转方向。适当选择的电场强度和离心机的加速度允许产生几乎任意的旋转波袋。对于D $ _2 $ S和2H-咪唑（C $ _3 $ h $ _4 $ n $ _2 $），我们以旋转量子数$ j $的巨大值创建了wavepackets，并在两个分子的两个分子的惯性轴的主要轴上进行了总角动量的所需预测。新方法的一种应用是三维对齐，其分子轴沿激光波矢量对齐，这对于分子的三维成像很重要，但在标准方法中却无法访问。实验室框架和分子框架中角动量的同时取向也可以用于稳定的散射实验。
We computationally demonstrate a new method for coherently controlling the rotation-axis direction in asymmetric top molecules with an optical centrifuge. Appropriately chosen electric-field strengths and the centrifuge's acceleration rate allow to generate a nearly arbitrary rotational wavepacket. For D$_2$S and 2H-imidazole (C$_3$H$_4$N$_2$) we created wavepackets at large values of the rotational quantum number $J$ with the desired projections of the total angular momentum onto two of the molecules' principal axes of inertia. One application of the new method is three-dimensional alignment with a molecular axis aligned along the laser's wave vector, which is important for the three-dimensional imaging of molecules yet not accessible in standard approaches. The simultaneous orientation of the angular momentum in the laboratory frame and in the molecular frame could also be used in robust control of scattering experiments.
