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- Title
High Harmonic Generation with Many-Particle Coulomb Interaction in Graphene Quantum Dot.
- Authors
Sedrakian, Kh. V.; Ghazaryan, A. G.; Avchyan, B. R.; Musayelyan, G. A.; Markosyan, T. M.
- Abstract
The multiphoton excitation and high harmonic generation (HHG) processes are considered using the microscopic quantum theory of nonlinear interaction of strong coherent electromagnetic (EM) radiation with rectangular graphene quantum dot (GQD) with zigzag edges and more than 80 atoms. The dynamic Hartree–Fock approximation has been used to consider the quantum dot-laser field nonlinear interaction at the nonadiabatic multiphoton excitation regime. The many-body Coulomb interaction is described in the extended Hubbard approximation. By numerical results, we show the significance of the rectangular GQD lateral size, shape, and EM wavefield orientation in rectangular GQD of the zigzag edge in the HHG process allowing for increasing the cutoff photon energy and the quantum yield of higher harmonics.
- Subjects
HARMONIC generation; HARTREE-Fock approximation; QUANTUM theory; GRAPHENE; QUANTUM dots; NONLINEAR theories; ATTOSECOND pulses
- Publication
Journal of Experimental & Theoretical Physics, 2023, Vol 137, Issue 1, p47
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776123070026