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<p>A circularly polarized Laguerre-Gaussian (LG) laser beam interacting with a semiconductor plasma can produce a quasi-static magnetic field in the azimuthal direction. In order to achieve this, the equations for electron and hole momentum are taken into consideration includingthe relativistic ponderomotive and Lorentz forces on equal footing.However, the present model neglects quantum corrections due to low number densities of the charge carriers and omits the thermal pressure of electrons and holes in comparison with the ponderomotive force of the LG laser beam. The electron and hole velocities are aligned along the z-axis to generate the plasma current density according to Ampère’s law, which results in a quasi-static magnetic field in the azimuthal direction. This magnetic field strongly depends on the intensity of the LG laser beam and can be analyzed to confirm its behavior in ultra-relativistic and non-relativistic limits. Numerically, the study investigates how the azimuthal and radial mode numbers, pulse amplitude, and hole-to-electron effective mass ratios affect the magnetic field profiles in semiconducting plasmas. Finally, the present study shows that this magnetic field strongly depends on the intensity of the LG laser beam which may confirm its behavior in nonrelativistic limits instead of relativistic limits.</p>

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Azimuthal magnetization in semiconductor relativistic plasma by interaction of EM waves

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • H. M. Ikram,
  • Muhammad Zubair Khan,
  • Sajid Ullah,
  • Ikram Muhammad

摘要

A circularly polarized Laguerre-Gaussian (LG) laser beam interacting with a semiconductor plasma can produce a quasi-static magnetic field in the azimuthal direction. In order to achieve this, the equations for electron and hole momentum are taken into consideration includingthe relativistic ponderomotive and Lorentz forces on equal footing.However, the present model neglects quantum corrections due to low number densities of the charge carriers and omits the thermal pressure of electrons and holes in comparison with the ponderomotive force of the LG laser beam. The electron and hole velocities are aligned along the z-axis to generate the plasma current density according to Ampère’s law, which results in a quasi-static magnetic field in the azimuthal direction. This magnetic field strongly depends on the intensity of the LG laser beam and can be analyzed to confirm its behavior in ultra-relativistic and non-relativistic limits. Numerically, the study investigates how the azimuthal and radial mode numbers, pulse amplitude, and hole-to-electron effective mass ratios affect the magnetic field profiles in semiconducting plasmas. Finally, the present study shows that this magnetic field strongly depends on the intensity of the LG laser beam which may confirm its behavior in nonrelativistic limits instead of relativistic limits.