RELAXATION DUE TO MULTIPLE LONGITUDINAL-OPTICAL-PHONON EMISSION AND DISSOCIATION OF EXCITON IN CD0.3ZN0.7S/ZNS STRAINED-LAYER SUPERLATTICES

被引：27

作者：

TAGUCHI, T ^{[1
]}

ENDOH, Y ^{[1
]}

NOZUE, Y ^{[1
]}

机构：

[1] TOHOKU UNIV, FAC SCI, DEPT PHYS, SENDAI, MIYAGI 980, JAPAN

来源：

APPLIED PHYSICS LETTERS | 1991年 / 59卷 / 26期

关键词：

D O I：

10.1063/1.106396

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical properties of Cd0.3Zn0.7S/ZnS strained-layer superlattices grown on (100) GaAs substrates by low-pressure metalorganic chemical vapor deposition, were investigated by means of photoluminescence excitation spectroscopy and through the effect of an electric field on exciton emission. A multiple longitudinal optical-phonon emission process, related to the relaxation of excitons, has been observed for the first time in the excitation spectra. The localization of excitons has been found to be the dominant cause of the linewidth broadening. The effects on an axial electric field on exciton emission intensity and peak position have revealed that the dissociation of the localized excitons on the low-energy side of the spectrum principally takes place due to impact ionization.

引用

页码：3434 / 3436

页数：3

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