PICOSECOND TRANSIENT GRATINGS IN CDS1-XSEX MIXED-CRYSTALS

被引：6

作者：

DORNFELD, C

NOLL, G

SCHWAB, H

HVAM, JM

WEBER, C

RENNER, R

GOBEL, EO

REZNITSKY, A

LYSSENKO, V

PENDJUR, SA

TALENSKY, ON

KLINGSHIRN, C

机构：

[1] Fachbereich Physik, Universität Kaiserslautern

来源：

JOURNAL OF CRYSTAL GROWTH | 1990年 / 101卷 / 1-4期

关键词：

D O I：

10.1016/0022-0248(90)91057-W

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We performed transient grating experiments to study various relaxation processes of localized excitons in CdS1xSex mixed crystals. At low temperatures we observe a strong nonlinear response, spectrally in the localized states. We measured the phase relaxation time of localized excitons with a correlation technique. At low excitation levels we found long phase relaxation times of 75 ps. In a three beam configuration of a transient grating experiment we investigated the recombination as well as the diffusion of excitons within the localized states. We observed a reduced mobility compared to the mobility of free excitons in the pure compounds and found diffusion coefficients D < 2 cm2/s. © 1989.

引用

页码：678 / 682

页数：5

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