Terahertz vortex beam propagation through a magnetized plasma-ferrite structure

AbstractThis 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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Beam propagation factors and kurtosis parameters of a Lorentz–Gauss vortex beam

Journal of the Optical Society of America A ◽

10.1364/josaa.31.001239 ◽

2014 ◽

Vol 31 (6) ◽

pp. 1239 ◽

Cited By ~ 15

Author(s):

Guoquan Zhou

Keyword(s):

Beam Propagation ◽

Vortex Beam

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Weakly relativistic self-focusing of Gaussian laser beam in magnetized cold quantum plasma

Laser and Particle Beams ◽

10.1017/s0263034617000726 ◽

2017 ◽

Vol 35 (4) ◽

pp. 699-705 ◽

Cited By ~ 5

Author(s):

M. Aggarwal ◽

V. Goyal ◽

Richa ◽

H. Kumar ◽

T.S. Gill

Keyword(s):

Magnetic Field ◽

Laser Beam ◽

Interparticle Distance ◽

Beam Propagation ◽

Magnetized Plasma ◽

Quantum Plasma ◽

Computational Technique ◽

Gaussian Laser Beam ◽

Self Focusing ◽

Paraxial Ray

AbstractIn the present paper, we have studied self-focusing of Gaussian laser beam in weakly relativistic magnetized cold quantum plasma. When interparticle distance is comparable to the de Broglie wavelength of charged particles, we cannot neglect the quantum contribution of plasma constituents. Therefore, propagation characteristics are studied by taking in to account quantum contribution in the presence of static magnetic field applied along the beam propagation. Our results show that the magnetic field plays a key role in achieving additional focusing, it modifies the quiver motion of electrons by adding cyclotron frequency to the natural frequency of oscillating electrons during laser beam propagation. The results are compared with those of weakly relativistic quantum plasma and weakly relativistic magnetized plasma. The self-focusing is found to be more pronounced when axial magnetic field is increased in the present model. We have setup the non-linear differential equation for the evolution of beam-width parameter by well-known paraxial ray approximation and solved it with the help of computational technique.

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