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

• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: ELECTROMAGNETISM,OPTICS,ACOUSTICS,HEAT TRANSFER,CLASSICAL MECHANICS,AND FLUID DYNAMICS
• 页码范围: 318-326
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/abcf3b

摘要

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 topo-logical 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.