Research Paper: Investigating Effective Parameters in the High-Harmonic Spectra from WSe2 Structure

Document Type : Research Paper

Authors

1 M. Sc. Student, Department of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran.

2 PhD Student, Department of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran.

3 Researcher, Institute of Condensed Matter Theory and Optics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Jena D-07743, Germany

4 Assistant Professor, Department of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran

Abstract

In this research, the symmetry of high-order harmonics resulting from the interaction of a single-layer WSe2 with a linearly polarized laser in both zigzag and armchair directions have been investigated using time-dependent density functional theory in real space. The dependence of the cutoff frequency behavior with the increase of the electric field amplitude and the behavior of the harmonic yield with the laser wavelength has been analyzed. The results show the linear dependence of the cutoff frequency with the electric field and the exponential behavior of the harmonic yield with the laser wavelength. Also, the effect of the input laser field polarization on the high-order harmonic spectrum and harmonic yield has been investigated. Changing the rotation angle of laser polarization to 30 degrees for elliptically polarized light with an ellipticity parameter of 0.1 creates the highest harmonic yield. Also, the results of this research show that by changing the polarization of the input electric field, the polarization of high-order harmonics also changes, which leads to the production of high-order harmonics with different polarization.

Keywords

Main Subjects

References

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History

  • Receive Date: 17 December 2022
  • Revise Date: 03 March 2023
  • Accept Date: 30 March 2023

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