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

## TL;DR

This paper develops a quantum theory for multiphoton stimulated bremsstrahlung in doped bilayer graphene, revealing nonlinear responses to terahertz radiation that differ from single-layer graphene, enabling new control of electronic transport.

## Contribution

It introduces a quantum theoretical framework for multiphoton stimulated bremsstrahlung in doped bilayer graphene under electromagnetic radiation, highlighting nonlinear effects due to parabolic dispersion.

## Key findings

- Nonlinear response of bilayer graphene to terahertz radiation.
- Significant differences from single-layer graphene behavior.
- Potential for manipulating electronic transport properties.

## 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.