论文标题
通过瞬时电场激发的多电子系统中的非线性光吸收：一种非扰动方法
Nonlinear Light Absorption in Many-Electron Systems Excited by an Instantaneous Electric Field: A Non-Perturbative Approach
论文作者
论文摘要
我们通过使用瞬时极限的电场的{\ em单}宽带脉冲来研究许多电子相互作用系统中的光吸收。我们从依赖时间诱导的偶极矩的傅立叶变换的非试管中确定吸收横截面，这可以从波函数的时间演化中获得。我们讨论了由此产生的横截面对脉冲幅度的依赖性，并与在一维模型系统上工作的扰动理论相比，我们强调了该方法的优势，该系统可访问数值精确的解决方案。因此，我们证明了所考虑的非遗传方法为我们提供了研究依赖性非线性光学激发的有效工具。
We study light absorption in many-electron interacting systems beyond the linear regime by using a {\em single} broadband impulse of an electric field in the instantaneous limit. We determine non-pertubatively the absorption cross section from the Fourier transform of the time-dependent induced dipole moment, which can be obtained from the time evolution of the wavefunction. We discuss the dependence of the resulting cross section on the magnitude of the impulse and we highlight the advantages of this method in comparison with perturbation theory working on a one-dimensional model system for which numerically exact solutions are accessible. Thus we demonstrate that the considered non pertubative approach provides us with an effective tool for investigating fluence-dependent nonlinear optical excitations.
