Abstract

We show the tight-focusing properties of a linearly polarized circular Airy Gaussian vortex beam (CAiGVB) with a high-numerical-aperture objective lens; the light intensity distributions exhibit diversity with different positions of the vortex pairs (on-axis or off-axis vortex pairs). By choosing different optical distribution factors, the CAiGVB turns into a circular Airy vortex beam or Gaussian vortex beam, and the depth of focus can also be controlled. It is known that the vortex beam possesses both orbital and spin angular momentum. The spin density vector changes its direction in three-dimensional space during beam propagation, as long as it is not purely transverse or longitudinal, which would cause 3D polarization ellipse topologies. In contrast, the polarization topologies degenerate into 2D when the spin density vector is purely transverse or longitudinal. Furthermore, the direction of the spin density vector is closely related to the Gouy phase difference between longitudinal and transverse electric field components of the vectorial beam.

© 2020 Optical Society of America

Evolution and particle trapping dynamics of circular Pearcey-Airy Gaussian vortex beams in tightly focused systems

Shuaiyang Wei, Jialong Tu, Zhili Lu, Xinyue Wang, Zhenzhen Li, Guanghui Wang, and Dongmei Deng
Opt. Express 31(17) 27843-27857 (2023)

Orbit-induced localized spin angular momentum in the tight focusing of linearly polarized vortex beams

Panpan Yu, Qian Zhao, Xinyao Hu, Yinmei Li, and Lei Gong
Opt. Lett. 43(22) 5677-5680 (2018)

Partially coherent radially polarized circular Airy beam

Tong Li, Dongmei Li, Xian Zhang, Kaikai Huang, and Xuanhui Lu
Opt. Lett. 45(16) 4547-4550 (2020)

Symmetry of electric spin angular momentum density in the tight focusing of linearly polarized vortex beams

Li Hang, Ying Wang, and Peifeng Chen
J. Opt. Soc. Am. A 36(8) 1374-1378 (2019)

Spatiotemporal sharply autofocused dual-Airy-ring Airy Gaussian vortex wave packets

Jingli Zhuang, Dongmei Deng, Xingyu Chen, Fang Zhao, Xi Peng, Dongdong Li, and Liping Zhang
Opt. Lett. 43(2) 222-225 (2018)