论文标题
从poynting向量到新的两极分化程度
From Poynting vector to new degree of freedom of polarization
论文作者
论文摘要
到目前为止，严格来说，琼斯向量只是关于平面电磁波极化状态的概念，尽管通常将其应用于大约大约的近似场。在这里，我们将其概括为非同顺型领域。与平面波的琼斯向量相同，非律中场的广义琼斯向量是全局的，因为它不取决于场的位置。这是通过研究极化载体在四个平面波的非允许叠加中的影响来实现的。更重要的是，通过这样做，我们发现，除了琼斯矢量外，还需要另一种称为Stratton Vector的自由度，还需要完全描述非律中领域的极化状态。结果表明，全局琼斯向量描述的极化取决于位置。极化的位置依赖性起源于极化碱基的位置依赖性。 stratton矢量指定了极化碱基取决于位置的方式。还给出了poynting载体对Stratton和Jones矢量的一般表达。
Up till now, the Jones vector is, strictly speaking, only a notion about the state of polarization of plane electromagnetic waves though it is generally applied to paraxial fields approximately. Here we generalize it to non-paraxial fields. The same as the Jones vector for plane waves, the generalized Jones vector for non-paraxial fields is global in the sense that it does not depend on the field position. This is achieved by investigating the effect of the polarization on the Poynting vector in the non-paraxial superposition of four plane waves. Even more importantly, by doing so we find that in addition to the Jones vector, another degree of freedom, called the Stratton vector, is also needed to completely describe the state of polarization of non-paraxial fields. It is shown that the polarization described by the global Jones vector is dependent on the position. The position dependence of the polarization originates in the position dependence of the polarization bases. The Stratton vector specifies the way in which the polarization bases depend on the position. A general expression for the dependence of the Poynting vector on the Stratton and Jones vectors is also given.
