Nonparaxial propagation of a vectorial apertured off-axis Lorentz beam

• 来源期刊: 中国物理B（英文版）
• 关键词: vectorial Rayleigh-Sommerfeld integral nonparaxial vectorial off-axis Lorentz beam rectangular aperture
• 年，卷（期）: 2009,（5）
• 页码范围: 1853-1860
• 页数: 8页
• 语种: 英文

摘要

Based on the vectorial Rayleigh-Sommerfeld integral formula and the complex Gaussian expansion of the hard-edge aperture function, an analytical propagation expression for a nonparaxial vectorial off-axis Lorentz beam passing through a rectangular aperture is derived. The unapertured case, the far field expression and the scalar paraxial result are also presented as special cases of the general formulae, respectively. Some numerical examples are also given to show the propagation characteristics of a nonparaxial vectorial off-axis Lorentz beam through a rectangular aperture. It is indicated that the f parameter, the off-axis displacement and the truncation parameter all play an important role in determining nonparaxial propagation behaviour.