论文标题
在沿惯性轴的中间力矩对齐的分子中创建旋转相干
Creating rotational coherences in molecules aligned along the intermediate moment of inertia axis
论文作者
论文摘要
我们提出和计算研究一种方法，以同时沿着：1）实验室固定方向定位不对称顶部分子的角动量； 2）惯性轴的分子中间力矩； 3）激光场波向量。为此，我们利用了一个连贯的控制方案，在这种方案中，定制的脉冲光学离心机在旋转状态下，旋转状态具有明确的总角动量到分子轴上的旋转状态。适当的时形光学离心机脉冲可以将旋转波袋留在特殊的旋转相干上，从而导致良好程度的3维瞬态比对，并具有沿激光脉冲传播方向指向的任意分子轴。例如，我们演示了如何生成高度弹性的D2S的旋转量子状态，其中分子主要围绕其中间惯性轴旋转，从而使其电偶极矩沿激光脉冲的传播方向永久排列。应用程序可能包括在各种照片电子成像实验中访问较少模糊的信息。
We propose and computationally study a method for simultaneously orienting the angular momentum of asymmetric top molecules along: 1) a laboratory-fixed direction; 2) the molecular intermediate moment of inertia axis; 3) the laser field wavevector. For this purpose we utilize a coherent control scheme in which a tailored-pulse optical centrifuge populates rotational states with well defined projections of the total angular momentum onto molecular axes. Appropriately time-shaped optical centrifuge pulses can leave the rotational wavepacket in peculiar rotational coherences which lead to a good degree of 3-dimensional transient alignment, with an arbitrary molecular axis pointing along the laser pulse propagation direction. As an example, we demonstrate how to generate highly resilient rotational quantum states of D2S in which the molecule rotates mainly about its intermediate inertia axis, such that its electric dipole moment is permanently aligned along the propagation direction of the laser pulse. Applications might include accessing less obscured information in various photo-electron imaging experiments.
