https://doi.org/10.1140/epjp/s13360-022-03011-z
Regular Article
Radially polarized terahertz vorticity induced by twisted Azimuthal Wiggler magnetic field
1
Faculty of Physics, Shahid Bahonar University of Kerman, Kerman, Iran
2
Photonics and Quantum Technologies Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran
Received:
24
March
2022
Accepted:
26
June
2022
Published online:
29
July
2022
In the presence of a vortex magnetic wiggler field, a scheme to create a twisted terahertz wave through a plasma was proposed. The radially polarized twisted terahertz radiation induced by the beating of two Gaussian lasers in a magnetized plasma channel was analytically investigated. The ponderomotive force due to laser beams imparted an oscillatory velocity to the electrons which led to a nonlinear current density that excited the terahertz radiation. Employing a twisted azimuthal magnetic wiggler field, the terahertz radiation became twisted. In fact, that wiggler field induced the vorticity of the terahertz waves. With the scheme, the terahertz wave was also radially polarized. The effects of the frequency of the twisted azimuthal magnetic wiggler field and the amplitude of density ripple on the terahertz radiation were considered.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
