Multiphoton excitation and high harmonic generation in rectangular graphene quantum dot

Autor:	Ghazaryan, A G, Sedrakian, Kh V
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1088/1402-4896/acc9ed
Popis:	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 (RGQD). The dynamic Hartree-Fock approximation is developed for the consideration of 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 RGQD lateral size, shape, and EM wavefield orientation in RGQD of the zigzag edge compear to the armchair edge in the HHG process allowing for increasing the cutoff photon energy and the quantum yield of higher harmonics. Comment: 17 pages, 14 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2209.12262 Zobrazit plný text záznamu View this record from Arxiv