ADIABATIC-FOLLOWING SOLUTIONS FOR MULTISUBBAND QUANTUM-WELLS EXCITED BY AN ULTRAFAST OPTICAL PUMP FIELD

被引：16

作者：

TSANG, L ^{[1
]}

CHANSUNGSAN, C ^{[1
]}

CHUANG, SL ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT ELECT & COMP ENGN,URBANA,IL 61801

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.45.11918

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The two-band effective semiconductor optical Bloch equations for a quantum well have been generalized to include multisubband effects. The ultrafast transient adiabatic-following solutions are obtained from the equations for interband polarizations, intersubband polarizations, and subband-carrier distribution functions of a Ga1-xAlxAs/GaAs quantum well, excited by an ultrafast optical pump field. Two conservation laws for the multisubband case are derived. The steady-state response and the pi-pulse response are studied. It is found that these multisubband equations lead to quantitatively different results from the conventional two-band approximation, particularly for wide quantum wells and asymmetric quantum wells.

引用

页码：11918 / 11928

页数：11

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