POLARIZATION DYNAMICS OF FREE-CARRIERS IN CDSXSE1-X CRYSTALS

被引：4
|
作者：
DAUNOIS, A
MERLE, JC
BIGOT, JY
机构：
[1] Groupe d'Optique Non-Linéaire et d'Optoélectronique, Institut de Physique et Chimie des Matériaux de Strasbourg, Unité Mixte 380046 CNRS-ULP-EHICS, F-67037 Strasbourg Cedex, 23, rue du Loess
来源：
JOURNAL OF APPLIED PHYSICS | 1995年 / 77卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.359348
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dephasing dynamics of the continuum states has been investigated in bulk CdSxSe1-x mixed crystals with two- and three-beam four-wave mixing experiments using 10 fs pulses. Decay times, varying between 17 and 4 fs as a function of the density of electron-hole pairs (8×10 16-1018 cm-3), indicate efficient Coulomb scattering with reduced screening as compared to bulk GaAs. Oscillations with 18 fs period which disappear within a few tens of femtoseconds are attributed to intervalence band quantum beats damped by intraband carrier thermalization. © 1995 American Institute of Physics.
引用
收藏
页码：429 / 431
页数：3
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