HOMOGENEOUS LINEWIDTH OF EXCITONS IN SEMIMAGNETIC CDTE/CD1-XMNXTE MULTIPLE-QUANTUM WELLS

被引:54
作者
HELLMANN, R [1 ]
KOCH, M [1 ]
FELDMANN, J [1 ]
CUNDIFF, ST [1 ]
GOBEL, EO [1 ]
YAKOVLEV, DR [1 ]
WAAG, A [1 ]
LANDWEHR, G [1 ]
机构
[1] UNIV WURZBURG,INST PHYS,W-8700 WURZBURG,GERMANY
来源
PHYSICAL REVIEW B | 1993年 / 48卷 / 04期
关键词
D O I
10.1103/PhysRevB.48.2847
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report on a detailed experimental study of the homogeneous linewidth of heavy-hole excitons in semimagnetic CdTe/Cd1-xMnxTe multiple quantum wells. Transient four-wave-mixing experiments are used to obtain the homogeneous linewidth by measuring the dephasing time of the excitons. We find a dephasing time of 2.2 ps corresponding to a homogeneous linewidth of 0.6 meV at low temperature and moderate exciton density. The homogeneous linewidth increases linearly with both exciton density and lattice temperature. The contributions of exciton-acoustic-phonon scattering, exciton-exciton interaction, and disorder to the homogeneous linewidth are determined.
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收藏
页码:2847 / 2850
页数:4
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