Effect of polarimetric nonregularity on the spin of three-dimensional polarization states
Effect of polarimetric nonregularity on the spin of three-dimensional polarization states
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DOI：
10.1088/1367-2630/abd9e5
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发表时间：
2021-01
影响因子：
3.3
通讯作者：
J. Gil;A. Friberg;A. Norrman;T. Setälä
中科院分区：
文献类型：
--
作者：
J. Gil;A. Friberg;A. Norrman;T. Setälä
虽然二维偏振态的自旋允许一个简单的表示，其物理解释的三维（3D）混合偏振态需要一个更复杂的分析。在这项工作中，我们解决的自旋结构的电场的一般3D极化状态，利用的特征分解和最近推出的概念与3D状态的不规则性。我们表明，一个不规则的偏振态必然有一个额外的自旋分量，由于国家的真正的3D性质，和自旋的方向和幅度的调节程度的不规则性。这一结果为研究部分偏振的倏逝光场和紧聚焦光场提供了新的物理视角，而这些光场最近被证明具有很强的非规则性。
While the spin of two-dimensional polarization states admits a simple representation, its physical interpretation for three-dimensional (3D) mixed polarization states requires a more involved analysis. In this work, we address the spin structure of the electric field of a general 3D polarization state by taking advantage of the characteristic decomposition and the recently introduced notion of nonregularity associated with 3D states. We show that a nonregular polarization state necessarily has an additional spin component due to the state’s genuinely 3D nature, and both the orientation and magnitude of the spin are regulated by the degree of nonregularity. The results provide new physical insight into partially polarized evanescent and tightly focused light fields in which strong nonregular character has recently been demonstrated.