NONLINEAR OPTICAL-ABSORPTION AND DYNAMICS IN QUANTUM-WELLS

被引：2

作者：

JIANG, M

WANG, HL

STEEL, DG

机构：

[1] Harrison M. Randall Laboratory of Physics, University of Michigan, Ann Arbor

来源：

APPLIED PHYSICS LETTERS | 1992年 / 61卷 / 11期

关键词：

D O I：

10.1063/1.107572

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present measurements of differential transmission and four-wave mixing in GaAs quantum well structures at 1.8 K near the inhomogeneously broadened lowest heavy-hole (hh1) exciton resonance using narrow band cw excitation. The data show an increase in absorption and an excitation lifetime of order 1-10-mu-s outside the spectral hole produced by the pump. The long lifetime and the experimentally determined absence of excitation spatial diffusion in this region suggests that optical absorption produces electron-hole pairs that are correlated but separately localized due to disorder. A phenomenological model is proposed to explain the nonlinear response based on two-photon absorption.

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页码：1301 / 1303

页数：3

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