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Resonant Terahertz Generation by the Interaction of Laser Beams with Magnetized Anharmonic Carbon Nanotube Array

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Abstract

In this novel scheme, a theoretical analysis of resonant terahertz (THz) generation in the array of magnetized anharmonic carbon nanotubes (CNTs) is presented. Two laser beams with frequencies (\({\omega }_{1}, {\omega }_{2}\)) and wavenumbers (\({k}_{1}, {k}_{2}\)) propagate through the array of vertically aligned anharmonic CNTs in the presence of an applied static magnetic field. It provides different displacements to the various electrons of CNTs. Due to this, restoration force varies nonlinearly with the displacements of electrons and hence results in anharmonicity. This anharmonicity plays a significant role in the enhancement of absorption of laser beams by the electrons of CNTs. The nonlinear restoration force produces the current which is responsible for the THz generation. It is observed that the applied magnetic field \((170\mathrm{ to }235\mathrm{ kG})\) helps in the enhancement of the THz generation by increasing the nonlinearity of the system. The impact of dimensions, inter-tube separation, and density of CNTs on the THz amplitude has also been analyzed.

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Authors and Affiliations

  1. Department of Physics, Lovely Professional University, G.T. Road, Phagwara - 144411, Punjab, India

    Sandeep Kumar, Niti Kant & Vishal Thakur

  2. Department of Applied Sciences, DAV Institute of Engineering & Technology, Jalandhar, 144008, India

    Shivani Vij

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  1. Sandeep Kumar
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  2. Shivani Vij
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  3. Niti Kant
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  4. Vishal Thakur
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Contributions

Sandeep Kumar: derivation, methodology, and analytical modeling; Shivani Vij: graph plotting, writing (original draft preparation); Niti Kant: numerical analysis and result discussion; Vishal Thakur: supervision, reviewing, and editing.

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Correspondence to Vishal Thakur.

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Kumar, S., Vij, S., Kant, N. et al. Resonant Terahertz Generation by the Interaction of Laser Beams with Magnetized Anharmonic Carbon Nanotube Array. Plasmonics 17, 381–388 (2022). https://doi.org/10.1007/s11468-021-01529-z

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