Abstract
Light-field shaping technology is of significant importance for applications in particle trapping and optical communication. In this paper, we generate a new class of tunable polycyclic tornado Laguerre-Gaussian beams (TPTLGBs) experimentally and numerically by applying an annular spiral-zone phase (ASZP) with the second order chirped factor to Laguerre-Gaussian beams. By the parameters of the ASZP, we can modulate the focusing and diffraction of TPTLGBs along z-axis, controlling the number and quality of optical bottles (OBs) formed. In addition, it is possible to precisely control the direction of rotation of TPTLGBs during propagation. We further explore the specific effects of the ASZP and the central vortex phase on TPTLGBs. Adjusting the parameters of TPTLGBs, we obtain a high intensity focus. The multi-dimensional tunability and complex phase structure of TPTLGBs also provide new possibilities for further development of optical technology.
Published Version
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