论文标题
在高费米能量的双层石墨烯中，由相干Thz-radadiation高谐波产生诱导
Induced by coherent THz-radiation high harmonics generation in bilayer graphene at high Fermi energies
论文作者
论文摘要
考虑到高度电磁辐射与AB堆叠的双层石墨烯在高费米能量的相互作用的相互作用下，在非扰动状态下的高阶谐波生成过程。电子高费米能力区域中所应用的相干低频辐射场不包括频带间的转变，从而增强了高谐波速率。用于带电载体与强泵波相互作用的开发的微观非线性量子理论在布里鲁因区域的狄拉克点附近有效。多光子激发方案中密度矩阵的liouville-von neumann方程在分析和数值上均可求解。根据数值解决方案，我们检查了泵浦浪潮任意极化的高阶谐波的速率。获得的结果表明，双层石墨烯可以用作从THZ到泵波中度强度下从THZ到中IR频率域的高阶谐波的有效材料。
The higher order harmonic generation process in the nonperturbative regime at the interaction of coherent electromagnetic radiation with the AB-stacked bilayer graphene at high Fermi energies is considered. The applied coherent low-frequency radiation field in the high Fermi energy zone of electrons excludes the interband transitions enhancing high harmonic rates. The developed microscopic nonlinear quantum theory for charged carriers interaction with a strong pump wave is valid near the Dirac points of the Brillouin zone. The Liouville-von Neumann equation for the density matrix in the multiphoton excitation regime is solved both analytically and numerically. Based on the numerical solutions, we examine the rates of higher-order harmonics of the pump wave of arbitrary polarization. Obtained results show that bilayer graphene can serve as an effective material for the generation of higher-order harmonics from THz to the mid-IR domain of frequencies at the pump wave moderate intensities.
