物理
拓扑量子数
旋涡
角动量
涡流
光束
光的轨道角动量
梁(结构)
高斯光束
总角动量
量子力学
量子电动力学
拓扑(电路)
经典力学
光学
数学
组合数学
热力学
作者
M. S. Soskin,V. N. Gorshkov,H. John Caulfield,J. Malos,N. R. Heckenberg
出处
期刊:Physical Review A
[American Physical Society]
日期:1997-11-01
卷期号:56 (5): 4064-4075
被引量:519
标识
DOI:10.1103/physreva.56.4064
摘要
We analyze the properties of light beams carrying phase singularities, or optical vortices. The transformations of topological charge during free-space propagation of a light wave, which is a combination of a Gaussian beam and a multiple charged optical vortex within a Gaussian envelope, are studied both in theory and experiment. We revise the existing knowledge about topological charge conservation, and demonstrate possible scenarios where additional vortices appear or annihilate during free propagation of such a combined beam. Coaxial interference of optical vortices is also analyzed, and the general rule for angular-momentum density distribution in a combined beam is established. We show that, in spite of any variation in the number of vortices in a combined beam, the total angular momentum is constant during the propagation.
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