RELAXATION OF POLAR EXCITONS IN A SEMICONDUCTOR

被引：0
|
作者：
VALLEE, F
BOGANI, F
FLYTZANIS, C
机构：
[1] UNITA GRP NAZL STRUT MAT,I-50125 FLORENCE,ITALY
[2] UNIV FLORENCE,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY
来源：
JOURNAL OF LUMINESCENCE | 1992年 / 53卷 / 1-6期
关键词：
D O I：
10.1016/0022-2313(92)90163-4
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The dephasing time of the Z3 exciton-polariton in CuCl is investigated using a new time resolved coherent technique. The measurements performed both as a function of polariton frequency and crystal temperature allow a precise determination of the redistribution channels of the initial energy between the various degrees of freedom of the crystal. The results show that relaxation is mediated by the acoustic phonons at low temperature and by the longitudinal optic phonons at high temperature (T greater-than-or-equal-to 40 K). The dephasing time of the longitudinal exciton is also measured and the results are compared to those obtained for the transverse mode.
引用
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页码：313 / 316
页数：4
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