Collisional absorption of the optical vortex beam in plasma

Nobahar, Davod; Hajisharifi, K.

doi:10.1016/j.optlastec.2019.04.016

Cited by 8 publications

(10 citation statements)

References 29 publications

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“…is the amplitude of the TM mode, 𝜑(z) is the phase of the TM mode, which also depends on the z component, and 𝜇 is a constant. [14,15] TM modes were considered by analyzing the related dispersion relation by analyzing the related dispersion relation. Collisional effects weaken TM modes because TM modes (especially in hot plasma) are more unstable than TE ones.…”

Section: Tm Mode Componentsmentioning

confidence: 99%

“…Twisted waves have the property of Orbital Angular Momentum (OAM). [1,14,15] In 1990, Allen reported [7] that light beams with helical phase fronts, such as the Laguerre Gaussian (LG) laser modes, [1,6] have OAM. [14,15] Twisted waves carry intrinsic spin and OAM.…”

Section: Introductionmentioning

confidence: 99%

“…[1,14,15] In 1990, Allen reported [7] that light beams with helical phase fronts, such as the Laguerre Gaussian (LG) laser modes, [1,6] have OAM. [14,15] Twisted waves carry intrinsic spin and OAM. [16] In addition, twisted waves have helical electric and magnetic field lines, [17] which lead to substantial effects.…”

Section: Introductionmentioning

confidence: 99%

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Electron acceleration in a warm, motional, magnetized plasma‐filled waveguide by twisted electromagnetic wave pulses

Barzegar,

Hasanbeigi,

Mehdian

et al. 2024

Contrib. Plasma Phys

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This paper studies the acceleration of an electron in a magnetized plasma waveguide caused by the interaction between the twisted electromagnetic wave and the plasma wave in a motional plasma. The spatial dependence of the amplitude and phase of the twisted TM mode has been derived by solving the wave equation. With appropriately assigned initial values, total electron energy gain can be calculated using numerical calculations. Numerical results show that plasma motion, as long as the twisted electromagnetic wave pulse, significantly affects electron acceleration during an electron's passage through the waveguide.

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Section: Tm Mode Componentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron acceleration in a warm, motional, magnetized plasma‐filled waveguide by twisted electromagnetic wave pulses

Barzegar,

Hasanbeigi,

Mehdian

et al. 2024

Contrib. Plasma Phys

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“…Plasma waves carrying OAM have been a research topic of growing interest in the last decade. In unmagnetised plasmas, OAM-carrying plasma waves have for the most part been studied theoretically under the scalar paraxial approximation [54][55][56], although exact solutions of the vector Maxwell equations have recently been exposed [57,58]. For cold magnetised plasma waves carrying OAM have been reported in the form of Trivelpiece-Gould (TG) and Whistler-Helicon (WH) waves [59][60][61], as well as predicted for twisted shear Alfvén waves [62].…”

Section: Oam Carrying Plasma Wavesmentioning

confidence: 99%

Wave propagation in rotating magnetised plasmas

Gueroult¹,

Rax²,

Fisch³

2023

Plasma Phys. Control. Fusion

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Wave propagation properties in a medium are fundamentally affected when this medium is moving instead of at rest. In isotropic dielectric media rotation has two noteworthy contributions: one is a mechanically induced circular birefringence which materialises as a rotation of the polarisation, the other is image rotation which corresponds to a rotation of the transverse structure of a wave. Here we review the effect of rotation in a magnetised plasma. We also point out applications both to astrophysical phenomena and laboratory devices. We first show that the mechanical effect of rotation on polarisation is in a magnetised plasma superimposed onto the classical Faraday rotation, and that failing to account for this new contribution could lead to errors in the interpretation of polarimetry data. We also demonstrate that image rotation is recovered in plasmas for a number of low-frequency magnetised plasma waves carrying orbital angular momentum, and that this phenomenon holds promise for the development of new rotation diagnostic tools in plasmas.

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“…These specific features of VBs have offered new degrees of freedom to make further advances in high resolution imaging and microscopy 25 , optical trapping 26 , data transmission and wireless communication 27 , quantum technology 28 , and so on. As a pivotal role in VBs communication, it can be seen that in the last two decades much effort has been devoted to study the interaction of Laguerre-Gaussian (LG) and Bessel beams with multilayer structures and other complex media 29 – 32 . More remarkably, applying programmable metasurfaces to generate and reshape OAM modes has conveyed research in the field of data encoding to new plateau 33 – 36 .…”

Section: Introductionmentioning

confidence: 99%

Vortex beam manipulation through a tunable plasma-ferrite metamaterial

Nobahar

Khorram

Rodrigues

2021

Sci Rep

Self Cite

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This paper is devoted to the study of vortex beam transmission from an adjustable magnetized plasma-ferrite structure with negative refraction index. We use the angular spectral expansion technique together with the $$4\times 4$$ 4 × 4 matrix method to find out the transmitted intensity and phase profiles of incoming Laguerre-Gaussian beam. Based on numerical analysis we demonstrate that high transparency and large amount of Faraday rotation in the proximity of resonance frequency region, reverse rotation of spiral wave front, and side-band modes generation during propagation are the remarkable features of our proposed structure. These controllable properties of plasma-ferrite metamaterials via external static magnetic field and other structure parameters provide novel facilities for manipulating intensity and phase profiles of vortex radiation in transmission through the material. It is expected that the results of this work will be beneficial to develop active magneto-optical devices, orbital angular momentum based applications, and wavefront engineering.

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Collisional absorption of the optical vortex beam in plasma

Cited by 8 publications

References 29 publications

Electron acceleration in a warm, motional, magnetized plasma‐filled waveguide by twisted electromagnetic wave pulses

Electron acceleration in a warm, motional, magnetized plasma‐filled waveguide by twisted electromagnetic wave pulses

Wave propagation in rotating magnetised plasmas

Vortex beam manipulation through a tunable plasma-ferrite metamaterial

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