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

被引：56

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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页码：2847 / 2850

页数：4

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