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arXiv 2102.02180physics.optics
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时空涡旋脉冲:角动量和自旋轨道相互作用

Spatiotemporal Vortex Pulses: Angular Momenta and Spin-Orbit Interaction

Konstantin Y. Bliokh

摘要:

最近,通过实验产生了携带纯横向固有轨道角动量的时空光学涡旋脉冲[{ \it Optica} { \bf 6},1547(2019); { \it Nat. Photon.} { \bf 14},350(2020)]。然而,对这种状态及其角动量性质的精确理论分析仍然是难以捉摸的。在这里,我们提供这样的分析,包括标量和矢量时空贝塞尔型的解决方案,以及它们的传播,偏振和角动量属性的描述。最重要的是,我们计算了自旋和轨道角动量的局域密度和积分值,并预测了可观察到的自旋-轨道相互作用现象,这些现象与横自旋和轨道角动量之间的耦合有关。我们的分析很容易扩展到其他性质的时空涡旋脉冲(例如,声学)。

英文摘要:

Recently, spatiotemporal optical vortex pulses carrying a purely transverse intrinsic orbital angular momentum were generated experimentally [{\it Optica} {\bf 6}, 1547 (2019); {\it Nat. Photon.} {\bf 14}, 350 (2020)]. However, an accurate theoretical analysis of such states and their angular-momentum properties remains elusive. Here we provide such analysis, including scalar and vector spatiotemporal Bessel-type solutions as well as descrption of their propagational, polarization, and angular-momentum properties. Most importantly, we calculate both local densities and integral values of the spin and orbital angular momenta, and predict observable spin-orbit interaction phenomena related to the coupling between the trasnverse spin and orbital angular momentum. Our analysis is readily extended to spatiotemporal vortex pulses of other natures (e.g., acoustic).

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。

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