Far-field properties of a cylindrically polarized vector beam and its beam quality beyond the paraxial approximation

• 来源期刊: 中国光学快报(英文版)
• 学科: 工学
• 关键词: 远场特性 光束质量 偏振矢量 近轴近似 圆柱 拉盖尔多项式 极化矢量 解析表达式
• 年，卷（期）: 2010,（5）
• 所属期刊栏目: Physical Optics
• 页码范围: 517-519
• 页数: 3页
• 分类号: TN248.4 TN241
• 语种: 英文

摘要

The far-field analytical expressions for the electromagnetic fields of a cylindrically polarized vector beam propagating in free space are obtained based on the vector angular spectrum and the method of stationary phase.The far-field energy flux distributions and the beam quality by the power in the bucket(PIB) in the nonparaxial regime have been investigated.The PIB of the cylindrically polarized beam depends on the ratio of the waist width to wavelength,the order of the Laguerre polynomial,and the angl...