Abstract
An analytical model of second-harmonic generation (SHG) from amplitude-modulated laser-irradiated carbon nanotubes (CNTs) implanted in silica substrate is presented. In the interaction of an intense amplitude-modulated laser with an array of magnetized anharmonic CNTs, a force is exerted on the electrons of CNTs due to the electric field of the laser. The exerted force causes the displacement of the electrons which is of the order of the radius of CNTs due to their nanoscale dimensions. In turn, the restoring force of the electrons becomes a nonlinear function of the displacement and results in anharmonicity. The CNTs are magnetized by applying the magnetic field perpendicularly to the beam propagation direction. The anharmonicity in CNTs broadens the plasmon resonance. The effects of the amplitude-modulated parameter and CNTs parameters on the amplitude of the second harmonic are analyzed. The magnetic field also helps to enhance the power of generated second harmonic.
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All authors contributed to the study’s conception and design. SV contributed to literature survey, derivation, methodology, analytical modeling, and numerical analysis; SK contributed to writing (original draft preparation); NK contributed to result discussion; VT contributed to supervision, reviewing, and editing, and VS contributed to graph plotting.
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Vij, S., Kumar, S., Thakur, V. et al. Resonant second-harmonic generation in an array of magnetized anharmonic carbon nanotubes. Indian J Phys 98, 1865–1872 (2024). https://doi.org/10.1007/s12648-023-02958-8
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DOI: https://doi.org/10.1007/s12648-023-02958-8