Power-Exponent-Phase Vortices for Manipulating Particles

Wei, 罗伟 Luo; Shubo, 程书博 Cheng; Zhanzhong, 袁战忠 Yuan; Shaohua, 陶少华 Tao

doi:10.3788/aos201434.1109001

Cited by 6 publications

(3 citation statements)

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“…Compared with fractional-order vortex beams, which are also noncanonical vortices, the PEPV beam has a larger circular intensity opening. Relevant literature suggests that the PEPV beam has unique applications in the field of microscopic particle capture and release [16].…”

Section: Introductionmentioning

confidence: 99%

Generation of Power-Exponent-Phase Vortex Beam Arrays Based on All-Dielectric Metasurfaces

Guo,

Shen,

et al. 2024

IEEE Photonics J.

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Optical vortices (OV) with an open shape have a unique function in directional particle transport and collection. A power-exponent-phase vortex (PEPV) has received particular attention as a type of unconventional vortex beam with a large opening and carrying orbital angular momentum (OAM). So far, only the generation methods and properties of an individual PEPV beam have been studied and analyzed. In this paper, we use dielectric metasurfaces instead of the conventional bulky optical device to generate PEPV arrays with a uniform diffracted intensity distribution and a controllable correlation between the topological charge number and the diffraction order. This approach is based on the theory of PEPV and combined with the principle of Dammann grating. The proposed method provides a new platform for various applications of light-matter interactions such as optical communication, optical encryption, and multiparticle manipulation.

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Section: Introductionmentioning

confidence: 99%

Generation of Power-Exponent-Phase Vortex Beam Arrays Based on All-Dielectric Metasurfaces

Guo,

Shen,

et al. 2024

IEEE Photonics J.

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“…Optical elements capable of generating spiral intensity patterns have been treated in a number of works [12][13][14][15][16][17][18][19][20][21][22][23][24]. In particular, E. Abramochkin and V. Volostnikov [12,13] proposed generating plane curves by means of astigmatic transforms.…”

Section: Introductionmentioning

confidence: 99%

“…Note that conventional diffractive spiral axicons [20] and more complex refractive analogs [21] can be used to generate 3D spiral intensity in the near diffraction zone. The simplest optical element for shaping a spiral intensity distribution is a power-exponent phase plate [22,23] or a generalized spiral phase plate [24].…”

Section: Introductionmentioning

confidence: 99%

Spiral Caustics of Vortex Beams

et al. 2021

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We discuss the nonparaxial focusing of laser light into a three-dimensional (3D) spiral distribution. For calculating the tangential and normal components of the electromagnetic field on a preset curved surface we propose an asymptotic method, using which we derive equations for calculating stationary points and asymptotic relations for the electromagnetic field components in the form of one-dimensional (1D) integrals over a radial component. The results obtained through the asymptotic approach and the direct calculation of the Kirchhoff integral are identical. For a particular case of focusing into a ring, an analytical relation for stationary points is derived. Based on the electromagnetic theory, we design and numerically model the performance of diffractive optical elements (DOEs) to generate field distributions shaped as two-dimensional (2D) and 3D light spirals with the variable angular momentum. We reveal that under certain conditions, there is an effect of splitting the longitudinal electromagnetic field component. Experimental results obtained with the use of a spatial light modulator are in good agreement with the modeling results.

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OAM content and propagation dynamics of integer-order Gamma vortices

Wang

Qiu

et al. 2020

Optics Communications

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Power-Exponent-Phase Vortices for Manipulating Particles

Cited by 6 publications

References 0 publications

Generation of Power-Exponent-Phase Vortex Beam Arrays Based on All-Dielectric Metasurfaces

Generation of Power-Exponent-Phase Vortex Beam Arrays Based on All-Dielectric Metasurfaces

Spiral Caustics of Vortex Beams

OAM content and propagation dynamics of integer-order Gamma vortices

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