期刊
OPTICS COMMUNICATIONS
卷 402, 期 -, 页码 672-677出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2017.06.089
关键词
Tight focusing; Radially polarized; Circular Airy vortex beam; Vectorial Debye theory
类别
资金
- NSFC [61475098]
- Shanghai science and technology commission research plan [14440500100]
Tight focusing properties of radially polarized circular Airy vortex beams (CAVB) are studied numerically. The light field expressions for the focused fields are derived based on vectorial Debye theory. We also study the relationship between focal profiles, such as light intensity distribution, radius of focal spot and focal length, and the parameters of CAVB. Numerical results demonstrate that we can generate a radially polarized CAVB with super-long focal length, super-strong longitudinal intensity or subwavelength focused spot at the focal plane by properly choosing the parameters of incident light and high numerical aperture (NA) lens. These results have potential applications for optical trapping, optical storage and particle acceleration. (C) 2017 Published by Elsevier B.V.
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