分子超转子转轴的相干控制
Coherent Control of the Rotation Axis of Molecular Superrotors
摘要：
超快分子旋转运动的控制得益于强场激光物理创新技术的发展。在这里，我们从理论上证明了一种新型的相干控制诱导旋转的非对称顶部分子围绕两个不同的分子轴。将光学离心机应用于硫化氢（H $_2$ S）分子以创建分子超转子，该分子超转子是围绕明确定义的轴进行超快旋转的对象。使用两个不同的脉冲包络的光学离心机，我们表明，H $_2$ S可以激发沿单独的路径的旋转状态。这导致围绕两个完全不同的分子轴的稳定旋转，同时确保旋转是围绕离心机的传播方向，即，实验室固定的$Z$轴。所提出的控制分子角动量排列的方案将，例如，在分子-分子或分子-表面散射的研究中是有用的，特别是由于与超转子相关的大量能量，其甚至可以通过改变光学离心脉冲的持续时间来控制。
英文摘要：
The control of ultrafast molecular rotational motion has benefited from the development of innovative techniques in strong-field laser physics. Here, we theoretically demonstrate a novel type of coherent control by inducing rotation of an asymmetric-top molecule about two different molecular axes. An optical centrifuge is applied to the hydrogen sulfide (H$_2$S) molecule to create a molecular superrotor, an object performing ultrafast rotation about a well-defined axis. Using two distinct pulse envelopes for the optical centrifuge, we show that H$_2$S can be excited along separate pathways of rotational states. This leads to stable rotation about two entirely different molecular axes while ensuring rotation is about the propagation direction of the centrifuge, i.e., the laboratory-fixed $Z$-axis. The presented scheme to control the angular momentum alignment of a molecule will, for instance, be useful in studies of molecule-molecule or molecule-surface scattering, especially due to the large amounts of energy associated with superrotors, which can even be controlled by changing the duration of the optical centrifuge pulse.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
