Abstract

This paper proposes a method for shaping a light spiral with the desired intensity and phase distributions based on the addition of an angular-dependent amplitude distribution to the phase transmission function of a generalized spiral phase plate. An expression for the amplitude distribution of the illuminating beam, which provides a given intensity distribution in the focal plane along the light spiral, was derived, with the numerically and experimentally obtained results confirming the analytical calculations. The ability to control the phase and intensity gradient along the generated light curves allows one to shape the desired transverse energy flow distribution in the focal plane, which is important for optical manipulation of nano- and microparticles as demonstrated by the laser guiding of trapped 5 µm polystyrene microspheres.

© 2021 Optical Society of America

Generation of a modulated versatile spiral beam with varying intensity distribution along the propagation

Fajing Li, Xinyang Yu, Junan Song, Pengfei Ji, Jun Ma, and Caojin Yuan
Opt. Express 31(24) 40620-40629 (2023)

Spirally rotating particles with structured beams generated by phase-shifted zone plates

Jila Rafighdoost, Xing Li, Yuan Zhou, Meiling Zhou, Manman Li, Shaohui Yan, and Baoli Yao
Appl. Opt. 61(5) 1268-1274 (2022)

Spirally phase-shifted zone plate for generating and manipulating multiple spiral beams

Jila Rafighdoost and Arash Sabatyan
J. Opt. Soc. Am. B 34(3) 608-612 (2017)

Adjustable square optical vortices generated by modified square spiral zone plates

Tian Xia, Zhao Hao, Yixiang Li, Yinglan Wang, Shengtan Chen, Jia Liu, and Shaohua Tao
J. Opt. Soc. Am. B 38(8) 2383-2390 (2021)

Optical vortex beam shaping by use of highly efficient irregular spiral phase plates for optical micromanipulation

W. M. Lee, X.-C. Yuan, and W. C. Cheong
Opt. Lett. 29(15) 1796-1798 (2004)