FEMTOSECOND DYNAMICS OF RESONANTLY EXCITED ROOM-TEMPERATURE EXCITONS IN II-VI CDZNTE/ZNTE QUANTUM-WELLS

被引：23

作者：

BECKER, PC

LEE, D

JOHNSON, AM

PROSSER, AG

FELDMAN, RD

AUSTIN, RF

BEHRINGER, RE

机构：

[1] AT&T BELL LABS, MURRAY HILL, NJ 07974 USA

[2] AT&T BELL LABS, HOLMDEL, NJ 07733 USA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.68.1876

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The femtosecond pump and probe technique, with 14-fs probe pulses, was used to measure exciton dynamics utilizing the unique characteristics of II-VI CdZnTe/ZnTe quantum wells, at room temperature. We have found that the bleaching effect of "cold" neutral excitons on excitons is stronger than that of the same density of "cool" uncorrelated charged electron-hole pairs, in disagreement with predictions. We find strong evidence, however, that long-range Coulomb screening is negligible in quasi-2D quantum wells. Additionally, we have measured a very fast exciton ionization time of 110 fs.

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页码：1876 / 1879

页数：4

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