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Nonlinear Interaction of Amplitude-Modulated Gaussian Laser Beam with Anharmonic Magnetized and Rippled CNTs: THz Generation

Kumar, Sandeep ; Vij, Shivani ; Kant, Niti ; Thakur, Vishal

Brazilian journal of physics, 2023-04, Vol.53 (2), Article 37 [Periódico revisado por pares]

New York: Springer US

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  • Título:
    Nonlinear Interaction of Amplitude-Modulated Gaussian Laser Beam with Anharmonic Magnetized and Rippled CNTs: THz Generation
  • Autor: Kumar, Sandeep ; Vij, Shivani ; Kant, Niti ; Thakur, Vishal
  • Assuntos: Amplitudes ; Anharmonicity ; Arrays ; Carbon nanotubes ; Electrons ; Gaussian beams (optics) ; General and Applied Physics ; Laser beams ; Lasers ; Magnetic fields ; Physics ; Physics and Astronomy ; Ponderomotive forces ; Radiation ; Surface plasmon resonance
  • É parte de: Brazilian journal of physics, 2023-04, Vol.53 (2), Article 37
  • Descrição: We propose a theoretical analysis for the generation of efficient terahertz (THz) radiation by using the nonlinear interaction of an amplitude-modulated Gaussian laser beam with a vertically aligned anharmonic and rippled carbon nanotubes (CNTs) array. This array of vertically aligned carbon nanotubes (VA-CNTs) is embedded on the base of the dielectric surface. The VA-CNTs have been magnetized by applying a static magnetic field perpendicular to the direction of propagation of the Gaussian beam and along the length of CNTs. The amplitude-modulated Gaussian laser beam passing through the CNTs exerts a nonlinear ponderomotive force on the electrons of CNTs and provides them resonant nonlinear transverse velocity to produce the nonlinear current which further leads to the generation of THz radiation. The surface plasmon resonance condition in the presence of an externally applied static magnetic field ( 110 to 330 kG ) and anharmonicity both help in broadening the resonance peak. By varying the modulation depth of the incident Gaussian laser beam, one can use emitted THz radiation to produce the best quality holograms.
  • Editor: New York: Springer US
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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