Precise measurement of trapping and manipulation properties of focused fractional vortex beams

Gao, Binjie; Wen, Jisen; Zhu, Guoming; Ye, Linhua; Wang, Li‐Gang

doi:10.1039/d1nr06163a

Cited by 9 publications

(2 citation statements)

References 50 publications

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“…The light beam has attracted much attention since its discovery by L. Allen in the 1990s [ 187 ]. Such OAM-carrying structured light beams have been found to have various significant applications in optics and photonics, such as optical communications [ 188 ], optical trapping [ 189 ], and image processing [ 190 ], etc. Because of their properties of ultra-compact configuration and powerful functionalities for wavefront control, metasurface-based structured-light technologies offer new opportunities for excavating the fundamentals and applications of light beams that are impossible to achieved by conventional optics [ 191 , 192 , 193 , 194 ].…”

Section: Meta-devicesmentioning

confidence: 99%

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Wan

Wang

et al. 2023

Nanomaterials

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Meta-optics based on metasurfaces that interact strongly with light has been an active area of research in recent years. The development of meta-optics has always been driven by human’s pursuits of the ultimate miniaturization of optical elements, on-demand design and control of light beams, and processing hidden modalities of light. Underpinned by meta-optical physics, meta-optical devices have produced potentially disruptive applications in light manipulation and ultra-light optics. Among them, optical metalens are most fundamental and prominent meta-devices, owing to their powerful abilities in advanced imaging and image processing, and their novel functionalities in light manipulation. This review focuses on recent advances in the fundamentals and applications of the field defined by excavating new optical physics and breaking the limitations of light manipulation. In addition, we have deeply explored the metalenses and metalens-based devices with novel functionalities, and their applications in computational imaging and image processing. We also provide an outlook on this active field in the end.

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Section: Meta-devicesmentioning

confidence: 99%

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Wan

Wang

et al. 2023

Nanomaterials

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“…Off-axis vortex beams are another sub-set of vortex beams which have spatial forms which have a radial opening and can be described as a coherent superposition of Laguerre-Gaussian (LG) laser modes [39]. In comparison to traditional optical vortex beams, non-integer and off-axis vortex beams with states of non-integer OAM can be applied to unique and exotic light-matter interactions, such as sorting and directional control of living cells [40], due to the property of the annular structure of the off-axis double vortex beam being broken. It is therefore possible to make more delicate manipulations on these particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis and Verification of Off-Axis Double Vortex Beams

Ye,

Zhou,

Aierken

et al. 2024

Photonics

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Vortex beams are unique in that they have annular spatial profiles and carry orbital angular momentum. This has led to their use in applications including laser processing, microparticle manipulation and signal transmission. Off-axis vortex beams, which may be considered a subset of vortex beams, display a broader spectrum of physical characteristics in comparison with their conventional (integer-order) counterparts. In this work, we derive the equations which describe the intensity distribution of off-axis vortex beams and use these to theoretically model their spatial profile. These models are supported by experimental generation of both integer and off-axis vortex beams, and the presence of orbital angular momentum is investigated through the use of the cylindrical lens transformation method.

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Optimizing Airy Needle-like Beams for Long-Range Axial Manipulation and Super-Resolution Imaging

Chen,

Gao,

et al. 2024

ACS Photonics

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Realizing high-quality needle-like beams is crucial for various advanced applications such as microfabrication, superresolution imaging, and micromanipulation. Here, we report a reliable method to achieve valuable Airy needle-like beams (ANBs) distinguished by both a large depth of focus and a high aspect ratio. This is accomplished by individually modulating and optimizing the amplitude of each ring of circular Airy beams. The proposed iterative algorithm can efficiently optimize these amplitudemodulation coefficients. In the focusing regions, the resulting ANBs exhibit remarkable properties, including axial flat-top (uniform) intensity distribution, extended depth of focus, high aspect ratio, and smaller focal spots. We further experimentally demonstrated that these characteristics endow ANBs with superior capabilities for multiplane microparticle trapping, axial transportation, and super-resolution imaging, particularly when integrated into optical manipulation systems and scanning confocal microscopy setups. The results suggest a wide range of potential applications of ANBs in optical manipulation, imaging, and laser writing.

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Precise measurement of trapping and manipulation properties of focused fractional vortex beams

Abstract: Fractional vortex beams (FVBs) were believed to be hard to rotate microparticles at a half-integer topological charge due to the unique radial opening (low-intensity gap) in their intensity ring. However,...

Cited by 9 publications

References 50 publications

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Numerical Analysis and Verification of Off-Axis Double Vortex Beams

Optimizing Airy Needle-like Beams for Long-Range Axial Manipulation and Super-Resolution Imaging

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