中国物理B ›› 2021, Vol. 30 ›› Issue (2): 24202-0.doi: 10.1088/1674-1056/abcf3b

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  • 收稿日期:2020-08-04 修回日期:2020-10-28 接受日期:2020-12-01 出版日期:2021-01-18 发布日期:2021-01-18

Propagation properties and radiation force of circular Airy Gaussian vortex beams in strongly nonlocal nonlinear medium

Xinyu Liu(刘欣宇), Chao Sun(孙超), and Dongmei Deng(邓冬梅)†   

  1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
  • Received:2020-08-04 Revised:2020-10-28 Accepted:2020-12-01 Online:2021-01-18 Published:2021-01-18
  • Contact: Corresponding author. E-mail: dmdeng@263.net
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11374108 and 11775083).

Abstract: We study the abruptly autofocusing and autodefocusing properties of the circular Airy Gaussian vortex (CAiGV) beams in strongly nonlocal nonlinear medium for the first time through numerical simulations. The magnitude of topological charges and the position of the vortex could change not only the light spot pattern but also the intensity contrast. Meanwhile, we can change the position of the autofocusing and autodefocusing planes by changing the parameter of the incident beam. Furthermore, we can control the peak intensity contrast through choosing properly the truncation factor. As for the radiation force, we study the gradient and the scattering forces of CAiGV beams on Rayleigh dielectric sphere. Our analyses demonstrate that the radiation force can be enhanced by choosing proper parameters of CAiGV beams.

Key words: optical vortices, abruptly autofocusing, radiation force, strongly nonlocal nonlinear

中图分类号:  (Fourier optics)

  • 42.30.Kq
42.25.Dd (Wave propagation in random media)