Multiphoton cross sections of conductive electrons stimulated bremsstrahlung in doped bilayer graphene

Abstract

The quantum theory of multiphoton stimulated bremsstrahlung of charged carriers on an arbitrary electrostatic potential of impurity ion in doped bilayer graphene at the presence of coherent electromagnetic radiation is developed. A terahertz wave field is considered exactly, while the electrostatic potential of doped ions as a perturbation. The essentially nonlinear response of bilayer graphene to a pump wave and significant differences from the case of a single layer graphene are shown, which can be associated to nonlinear parabolic dispersion. The latter opens new way to manipulate with the electronic transport properties of conductive electrons of bilayer graphene by coherent radiation field of terahertz or near-infrared frequencies.

Induced by coherent THz-radiation high harmonics generation in bilayer graphene at high Fermi energies

“…The intensity of the gaseous harmonics is relatively weak because of low gas density, so that in the recent years became actual the nonperturbative study of optical phenomena such as HHG in the condensed matter-solids. Currently, the investigations of HHG and related nonlinear processes have been successfully extended to bulk crystals [6][7][8][9][10][11][12][13][14][15][16] and two-dimensional (2D) nanostructures, such as graphene and graphene-like materials [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], monolayer transition metal dichalcogenides [36], [37], hexagonal boron nitride [38], topological insulators [39], buckled 2D hexagonal nanostructures [40], and also solids [41]. Under some conditions, the process of HHG in bulk solids is similar to atomic HHG [13] and can be well described within a semiclassical three-step model [42], [43].…”

Microscopic nonlinear quantum theory of absorption of coherent electromagnetic radiation in doped bilayer graphene

“…The rates of elastic and transport scattering on charged impurities in SG and BG are investigated experimentally and comparison with theoretical predictions have been made in [48][49][50][51][52][53]. The multiphoton rates and total cross-sections of the SB process of conductive electrons on the charged impurity ions in BG had been studied in Born approximation by scattering potential field in [54].…”