• Chinese Optics Letters
  • Vol. 22, Issue 9, 090007 (2024)
Xiaoyun Jiang, Minglie Hu, and Chen Xie*
Author Affiliations
  • Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
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    DOI: 10.3788/COL202422.090007 Cite this Article Set citation alerts
    Xiaoyun Jiang, Minglie Hu, Chen Xie, "Generation of multi-freedom controllable helical beam through high-order Bessel beams [Invited]," Chin. Opt. Lett. 22, 090007 (2024) Copy Citation Text show less

    Abstract

    In this Letter, we propose a scheme to generate helical optical fields with multi-freedom controllable features. High-quality helical lobes with adjustable radii, chirality, and lobe numbers can be generated by tuning the phase term of two paired high-order Bessel beams. Furthermore, the pitch of the helical beam can be controlled by combining another rotational phase term. The validity of our scheme is demonstrated in both simulations and experiments. Our scheme is promising to facilitate the rapid fabrication of helical structures with diverse parameters, which are critical in various applications, such as optical metamaterials, biology, and particle transport.

    {ψl=exp[i(kl,rρ+lθ)]ψm=exp[i(km,rρ+mθ)].

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    r=Zlλ2πsinαl,

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    {φ1=[kl,rlm2v(ρ)]ρ+lθφ2=[km,r+lm2v(ρ)]ρ+mθ.

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    Xiaoyun Jiang, Minglie Hu, Chen Xie, "Generation of multi-freedom controllable helical beam through high-order Bessel beams [Invited]," Chin. Opt. Lett. 22, 090007 (2024)
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