On localized approximations for Laguerre-Gauss beams focused by a lens

Ambrosio, Leonardo André; Gouesbet, G.

doi:10.1016/j.jqsrt.2018.07.006

Cited by 45 publications

(4 citation statements)

References 42 publications

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“…While straightforward in principle, proper care must be taken when comparing numerics and real experiments. Particularly, the localized approximations, that are often used for modeling LG beams, need to be adapted carefully [13]. In this work, we do not address this issue further and consider azimuthal LG beam modes, constructed as in the Optical Tweezers Toolbox [14], near the beam focus in the paraxial approximation [15].…”

Section: Incident Electromagnetic Field Modelingmentioning

confidence: 99%

Non-spherical particles in optical tweezers: A numerical solution

et al. 2019

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We present numerical methods for modeling the dynamics of arbitrarily shaped particles trapped within optical tweezers, which improve the predictive power of numerical simulations for practical use. We study the dependence of trapping on the shape and size of particles in a single continuous wave beam setup. We also consider the implications of different particle compositions, beam types and media. The major result of the study is that for different irregular particle shapes, a range of beam powers generally leads to trapping. The trapping power range depends on whether the particle can be characterized as elongated or flattened, and the range is also limited by Brownian forces.

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Section: Incident Electromagnetic Field Modelingmentioning

confidence: 99%

Non-spherical particles in optical tweezers: A numerical solution

et al. 2019

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“…3 Research on the Mie scattering characteristics of structured light Moreover, a detailed analysis of the scattering characteristics of LG beams with spherical particles enables extraction of fundamental microparticle parameters [30] and identification of source properties of LG beams [31]. These applications rely on theoretical simulation models within the GLMT framework [8].…”

Section: Introductionmentioning

confidence: 99%

Generalized Lorenz-Mie theory and simulation software for structured light scattering by particles

Cheng,

Cao,

Ren

et al. 2024

Front. Phys.

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Structured light refers to an optical field with modulated phase and amplitude, characterized by distinct spatial patterns. It has applications in optical manipulation, 3D imaging, remote sensing, and communications. The Generalized Lorenz-Mie Theory (GLMT) extends foundational Mie theory to accommodate complex structured lights, enabling precise characterization of structured light-particle interactions. GLMT has emerged as a central theoretical framework for analyzing interactions between spherical particles and arbitrary structured light. This paper introduces ABSphere, simulation software utilizing GLMT to model structured light-spherical particle interactions. It then comprehensively reviews representative structured lights, including Laguerre–Gaussian, Bessel, and Airy beams, elucidating their interactions with spherical particles. Understanding structured light scattering behavior is crucial for elucidating underlying interaction mechanisms with spherical particles. The paper also emphasizes the significance of modeling structured light scattering by particles and discusses future directions for ABSphere software. Through continuous theoretical refinements and advancements, deeper understanding of structured light-particle interaction mechanisms can be achieved, enabling innovations in optical applications and technologies.

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“…However, the POV is unstable and inevitably degenerates to a Bessel-Gaussian beam with the same order in the far field. The focusing lens [13] is useful to suppress its instability and has been applied to the focused Laguerre-Gaussian beam [14,15], and the focused Bessel-Gaussian beam [16]. Yet the crosstalk characteristics [17] of the FPOV have not been studied in anisotropic AT.…”

Section: Introductionmentioning

confidence: 99%

Crosstalk characteristics of orbital angular momentum of focused perfect vortex beam in atmospheric turbulence

Wei,

Du,

Shi

et al. 2023

Laser Phys.

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The perfect optical vortex beam (POV) is a special kind of vortex beam, whose radius is independent of its orbital angular momentum (OAM) mode, but the atmospheric turbulence (AT) causes crosstalk between different topological charges, which is a serious challenge in OAM-based communication system. We establish a theoretical model with a turbulence suppression effect for deriving the spiral spectrum of a focused perfect optical vortex beam (FPOV) after propagation through anisotropic AT. Through numerical analysis, we simulate the behavior of FPOV under different turbulence and beam parameters to better understand the effect of the received probability and its corresponding modal crosstalk under various conditions. In addition, the simulation of AT uses the multi-phase screen method to verify the theoretical results. The results show that the changes in topological charge, wavelength, receiving aperture, beam waist, and hollow radius all have an influence on the received probability. Also, some strategies for selecting turbulence parameters to reduce modal crosstalk in anisotropic AT are also discussed. The focus would reduce the effect of turbulent aberrations on the signal OAM mode received probability, and the FPOV provided better performance than the POV, which may be useful in OAM-based free space optical communication.

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On localized approximations for Laguerre-Gauss beams focused by a lens

Cited by 45 publications

References 42 publications

Non-spherical particles in optical tweezers: A numerical solution

Non-spherical particles in optical tweezers: A numerical solution

Generalized Lorenz-Mie theory and simulation software for structured light scattering by particles

Crosstalk characteristics of orbital angular momentum of focused perfect vortex beam in atmospheric turbulence

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