Evanescent spherical waves of scalar point source
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- 作者：A. Suhadolnik alojz.suhadolnik@fs.uni-lj.si
- 关键词：Spherical wave ; Evanescent wave ; Homogeneous wave ; Weyl&rsquo ; s expansion
- 刊名：Optik - International Journal for Light and Electron Optics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：130
- 期：Complete
- 页码：306-309
- 全文大小：267 K
- 卷排序：130
文摘
It is well known that evanescent waves decay exponentially from a wave source and influence on a near field of the particular source. In a zero frequency limit these waves decay according to a power law around a spherical source. In the paper exact calculations of an evanescent and homogeneous field in the zero frequency limit has been performed. The calculations base on an angular spectrum representation of a spherical wave using Weyl’s expansion technique.