Multiphoton excitation and high harmonic generation in rectangular graphene quantum dot

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 (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.

arXiv comment17 pages, 14 figures

References in corpus (19)

• Electric Field Effect in Atomically Thin Carbon Films
• Energy Band Gap Engineering of Graphene Nanoribbons
• Energy Gaps in Graphene Nanoribbons
• Electronic States of Graphene Nanoribbons
• Peculiar Width Dependence of the Electronic Property of Carbon Nanoribbons
• Optical properties of graphene nanoribbons: the role of many-body effects
• Voltage-Controlled Optics of a Quantum Dot
• Excitonic absorption in gate controlled graphene quantum dots
• Magnetism and correlations in fractionally filled degenerate shells of graphene quantum dots
• Graphene Nanoribbon and Graphene Nanodisk
• Edge stability, reconstruction, zero-energy states and magnetism in triangular graphene quantum dots with zigzag edges
• First principles vs second principles: Role of charge self-consistency in strongly correlated systems
• Efficient high-harmonic generation in graphene with two-color laser field at orthogonal polarization
• High-order harmonic generation in solid ${\mathbf{C}}_{60}$
• The saddle-point exciton signature on high harmonic generation in 2D hexagonal nanostructures
• High harmonic generation in triangular graphene quantum dots
• Extended high-harmonic spectra through cascade resonance in confined quantum systems
• Excitonic Effects in the Optical Spectra of Graphene Nanoribbons
• High harmonic generation in fullerene molecules