The numerical propagation of intense laser pulses through bulk material requires the recurrent calculation of the nonlinear material response. To describe the optical Kerr effect and the current in the conduction band for macroscopic propagation distances, very simplified models are typically used. Recent studies of the response of dielectrics to intense few-cycle pulses have revealed that ionization does not accumulate monotonically, but conduction bands are populated both irreversibly and reversibly during a laser cycle. The reversible (or transient or virtual) population of the conduction bands is not captured by simple response models. Here, an efficient iteration based on the semiconductor Bloch equations for three bands is developed, which consistently captures the laser cycle resolved interband polarization and intraband current. The full calculation of the nonlinear material response at each propagation step is avoided, instead only the incremental modification of the pr...

中文翻译：

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半导体Bloch方程的迭代，用于超短激光脉冲传播

强激光脉冲通过块状材料的数值传播需要对非线性材料响应进行递归计算。为了描述宏观传播距离的光学克尔效应和导带中的电流，通常使用非常简化的模型。电介质对强烈的几个周期脉冲响应的最新研究表明，电离不会单调累积，但在激光周期中，导带不可逆地和可逆地聚集。简单的响应模型无法捕获导带的可逆（或瞬态或虚拟）总体。在这里，开发了基于半导体Bloch方程的三个波段的有效迭代，该迭代一致地捕获了激光周期解析的波段间极化和波段内电流。