Vortex families generated by Fermat spiral photon sieve

Yidong Liu; Yutong Zhang

doi:10.1117/12.2620523

8 July 2022 Vortex families generated by Fermat spiral photon sieve

Yidong Liu, Yutong Zhang

Proceedings Volume 12280, 2021 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications; 1228006 (2022) https://doi.org/10.1117/12.2620523
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

Fermat spiral photon sieve (FSPS) containing many circular holes arranged along several Fermat spiral lines is an interesting element to generate vortex beam because of its special chiral structure. This work models the FSPS and derive the diffraction field analytically. In addition to the familiar azimuthal periodicity at the focal plane in previous works, we find the longitudinal periodicity of the generated vortex beams which present themselves as many families and therefore the multi-foci property is also discovered. We relate the vortex families with the parameters of FSPS and shows the rules. This work is helpful for design of FSPS and generation of vortex beams.

Citation Download Citation

Yidong Liu and Yutong Zhang "Vortex families generated by Fermat spiral photon sieve", Proc. SPIE 12280, 2021 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1228006 (8 July 2022); https://doi.org/10.1117/12.2620523

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