Tight focusing of axially symmetric polarized vortex beams
作者： Zhe-Hai Zhou , Yang-Kuan Guo , Lian-Qing Zhu
DOI: 10.1088/1674-1056/23/4/044201
关键词: Laser printing 、 Diffraction 、 Physics 、 Polarization (waves) 、 Axial symmetry 、 Optics 、 Lithography 、 Topological quantum number 、 Optical tweezers 、 Vortex beam
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 and phase distributions at focus largely influenced by both polarization order topological charge incident beams. Moreover, focal spots with flat-topped or tightly-focused patterns can be flexibly achieved carefully choosing charge, which confirms potential such in wide applications, as optical tweezers, laser printing, lithography, material processing.
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