Generalized semiconductor Bloch equations: Local fields and transient gratings.
Generalized semiconductor Bloch equations: Local fields and transient gratings.
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广义半导体布洛赫方程：局部场和瞬态光栅。
DOI：
10.1103/physrevb.44.11253
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Mukamel
中科院分区：
文献类型：
--
作者：
Kuklinski;Mukamel
导出了在Hartree近似下描述半导体近共振光激发的两点等时电子相关函数的运动方程。这些方程推广了常见的半导体布洛赫方程，纳入了介质的非均匀激发和强介电效应。结果表明，用局部场代替外电场不能完全消除多体效应对光学非线性的影响。
Equations of motion for two-point equal-time electronic correlation functions, which describe near-resonant optical excitation of semiconductors in the Hartree approximation, are derived. These equations generalize the common semiconductor Bloch equations to incorporate inhomogeneous excitation of the medium and strong dielectric effects. We show that the many-body effects on the optical nonlinearity cannot be fully included by simply replacing the external electric field by the local field.