中国物理B ›› 2014, Vol. 23 ›› Issue (4): 44201-044201.doi: 10.1088/1674-1056/23/4/044201
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
周哲海a b, 郭阳宽a b, 祝连庆a b
Zhou Zhe-Hai (周哲海)a b, Guo Yang-Kuan (郭阳宽)a b, Zhu Lian-Qing (祝连庆)a b
摘要: Tight focusing of axially symmetric polarized vortex beams is studied numerically based on vector diffraction theory. The mathematical expressions for the focused fields are derived. Simulation results show that the focused fields and phase distributions at focus are largely influenced by both the polarization order and topological charge of the incident beams. Moreover, focal spots with flat-topped or tightly-focused patterns can be flexibly achieved by carefully choosing the polarization order and the topological charge, which confirms the potential of such beams in wide applications, such as optical tweezers, laser printing, lithography, and material processing.
中图分类号: (Polarization)