论文标题
矩形石墨烯量子点中的多光子激发和高谐波产生
Multiphoton excitation and high harmonic generation in rectangular graphene quantum dot
论文作者
论文摘要
使用强相干电磁（EM）辐射与矩形石墨烯量子点（RGQD）的非线性相互作用的微观量子理论，考虑了多光子激发和高谐波产生（HHG）过程。开发了动态的Hartree-fock近似，以考虑在非绝热的多光子激发方案下量子点激光场非线性相互作用。多体库仑相互作用在扩展的哈伯德近似中描述。通过数值结果，我们在HHG过程中显示了Zigzag边缘边缘与扶手椅边缘的RGQD侧向横向大小，形状和EM波场取向的重要性，从而可以增加截止光子能量和较高谐波的量子产量。
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.
