OPTICAL-PHONON-ASSISTED AND ACOUSTICAL-PHONON-ASSISTED HOPPING OF LOCALIZED EXCITONS IN CDTE/ZNTE QUANTUM-WELLS

被引：56
作者：
KALT, H
COLLET, J
BARANOVSKII, SD
SALEH, R
THOMAS, P
DANG, LS
CIBERT, J
机构：
[1] UNIV TOULOUSE 3,PHYS SOLIDES LAB,F-31062 TOULOUSE,FRANCE
[2] AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA
[3] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY
[4] UNIV MARBURG,ZENTRUM MAT WISSENSCH,FACHBEREICH PHYS & WISSENSCH,W-3550 MARBURG,GERMANY
[5] UNIV J FOURIER,SPECTROMETRIE PHYS LAB,F-38402 ST MARTIN DHERES,FRANCE
来源：
PHYSICAL REVIEW B | 1992年 / 45卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.45.4253
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Interaction with both acoustical as well as optical phonons contributes to the relaxation of excitons in tail states of coherently strained CdTe/ZnTe quantum wells. The contribution of acoustical phonons is most important in the thinnest well of 1.8 monolayers. Hopping down, which involves the emission of acoustic phonons, leads to a redshift of the luminescence band of about 10 meV within the first 200 ps after excitation. A comparison of the experimental data with results of a quantitative theory allows us to evaluate the concentration of localized states involved in the relaxation process.
引用
收藏
页码：4253 / 4257
页数：5
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