Modulation of orbital angular momentum of vortex beam based on ordered pinhole screens

Zhang, Jinlong; Yang, Kaibo; Luo, Hao; Wen, Feng; Gu, Yuzong; Wu, Zhenkun

doi:10.1016/j.rinp.2023.106713

Cited by 1 publication

(1 citation statement)

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“…This twisting property is quantified by the topological charge, which indicates the number of complete rotations the beam's phase makes around the center axis in the span of one wavelength. [6][7][8] The topological charge plays a crucial role in determining the number of twists and the direction of the acoustic vortex's phase spiral. Another notable aspect of acoustic vortices is their inherent orbital angular momentum, which holds the potential to be transferred to different materials or objects through wave-matter interactions.…”

Section: Introductionmentioning

confidence: 99%

Underwater double vortex generation using 3D printed acoustic lens and field multiplexing

Ellouzi,

Zabihi,

Aghdasi

et al. 2024

APL Materials

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The generation of acoustic vortex beams has attracted an increasing amount of research attention in recent years, offering a range of functions, including acoustic communication, particle manipulation, and biomedical ultrasound. However, incorporating more vortices and broadening the capacity of these beams and associated devices in three dimensions pose challenges. Traditional methods often necessitate complex transducer arrays and are constrained by conditions such as system complexity and the medium in which they operate. In this paper, a 3D printed acoustic lens capable of generating a double vortex pattern with an optional focusing profile in water was demonstrated. The performance of the proposed lens was evaluated through computational simulations using finite element analysis and experimental tests based on underwater measurements. The results indicate that by altering the positioning of the vortices’ axes, it is possible to control both the intensity and the location of the pressurized zone. The proposed approach shows promise for enhancing the effectiveness and versatility of various applications by generating a larger number of vortices and freely tailoring the focal profile with a single lens, thereby expanding the practical uses of acoustic vortex technology.

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Section: Introductionmentioning

confidence: 99%