ROLE OF BIEXCITONS IN THE STIMULATED-EMISSION OF WIDE-GAP II-VI QUANTUM-WELLS

被引：139
|
作者：
KRELLER, F
LOWISCH, M
PULS, J
HENNEBERGER, F
机构：
[1] Institut für Physik, Humboldt-Universität Berlin, 10115 Berlin
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.75.2420
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
On high-quality ZnCdSe/ZnSe quantum wells the occurrence of a new emission feature energetically below the exciton transition is demonstrated from which stimulated emission and gain emerge at elevated excitation levels (10 kW/cm(2)). Application of a magnetic field allows us to distinguish this feature from bound excitons and evidence its biexciton nature. Subpicosecond excite-and-probe measurements reveal the scenario of exciton-exciton interaction in the presence of alloy disorder (localization). A model accounting for bound and antibound two-exciton states provides good agreement with the experimental data.
引用
收藏
页码：2420 / 2423
页数：4
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