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Bessel beam

About: Bessel beam is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 42264 citations.


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Journal ArticleDOI
TL;DR: In this paper, a model of periodic structures in the plasma channel of an extended laser spark is considered and it is shown that sideways delivery of the heating radiation by a Bessel beam to the breakdown region and expansion of the heated plasma result in inhomogeneous refraction and, consequently, give rise to structures with a longitudinal period ~λ/γ2.
Abstract: A model of the appearance of periodic structures in the plasma channel of an extended laser spark is considered. It is shown that sideways delivery of the heating radiation by a Bessel beam to the breakdown region and expansion of the heated plasma result in inhomogeneous refraction and, consequently, give rise to structures with a longitudinal period ~λ/γ2 (λ is the radiation wavelength and γ is the angle of inclination of the beam to the axis). This model is used to account for the results of experiments demonstrating that such structures are not observed in the case of a low-density gas (at pressures of 0.05 bar or less) and short (~0.1 ns) heating pulses.

7 citations

Journal ArticleDOI
TL;DR: In this paper, the authors employed Debye series expansion to the analysis of radiation pressure force exerted on a spherical particle induced by an axicon-generated Bessel beam, where the beam shape coefficients for Bessel beams were calculated using analytical expressions obtained by the integral localized approximation, and the scattering coefficients were expanded using debye series.
Abstract: Debye series expansion is employed to the analysis of radiation pressure force exerted on a spherical particle induced by an axicon-generated Bessel beam. The beam shape coefficients for Bessel beams are calculated using analytical expressions obtained by the integral localized approximation, and the scattering coefficients are expanded using Debye series. The effect of different parameters (beam center location, radius of particle, half-cone angle, etc.) on radiation pressure force is studied. The contributions of different scattering processes on radiation pressure force are isolated for better understanding of physical mechanism of various features of radiation pressure force.

7 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of radial anisotropy on the optical force exerted on the anisotropic-core/plasmonic-shell nanoparticles under the illumination of the zeroth order Bessel beam based on extended Mie theory and Maxwell's stress tensor method was investigated.

7 citations

Journal ArticleDOI
TL;DR: It is shown that an appropriate choice of Bessel beam parameters can provide excitation of a single given mode and an unlimited value of the radiative Q factor of pseudo-modes.
Abstract: The exact analytical solution of Maxwell equations for a Bessel light beam scattered by a sphere is found. Scattered power, stored energy and a generalized Q factor as a function of frequency, the sphere radius, permittivity, and the Bessel beam angle are found. On the base of this solution, modes and pseudo-modes of a dielectric sphere are extracted by calculation of the generalized Q factor. It is shown that an appropriate choice of Bessel beam parameters can provide excitation of a single given mode and an unlimited value of the radiative Q factor of pseudo-modes.

7 citations

Journal ArticleDOI
01 Aug 2021
TL;DR: In this paper, the influence of the beam center, beam order, beam polarization type, and half cone angle of the vector Bessel beam on the characteristics of photonic nanojet (PNJ) was analyzed.
Abstract: The photonic nanojet (PNJ) produced by a vector Bessel beam irradiating a dielectric spheroidal particle is investigated using the Discrete Dipole Approximation. The influence of the beam center, beam order, beam polarization type, and half cone angle of the vector Bessel beam on the characteristics of PNJ is analyzed. Several characteristics of PNJ including maximum intensity, the focal length, the effective length, and full width at half maximum are considered. The results show that the characteristics of the PNJ can be controlled by changing the four parameters of the Bessel beam. We think it will help to enhance the application of Bessel beams in generating PNJ and provide new properties to generate PNJ.

7 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202373
2022149
2021113
2020126
2019134
2018140