Resonant femtosecond emission from quantum well excitons: The role of Rayleigh scattering and luminescence

被引：124
作者：
Haacke, S
Taylor, RA
Zimmermann, R
BarJoseph, I
Deveaud, B
机构：
[1] UNIV OXFORD,DEPT PHYS,CLARENDON LAB,OXFORD OX1 3PU,ENGLAND
[2] HUMBOLDT UNIV BERLIN,INST PHYS,D-10117 BERLIN,GERMANY
[3] WEIZMANN INST SCI,DEPT PHYS,IL-76100 REHOVOT,ISRAEL
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.78.2228
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the ultrafast properties of secondary radiation of semiconductor quantum wells under resonant excitation. We show that the exciton density dependence allows one to identify the origin of secondary radiation. At high exciton densities, the emission is due to incoherent luminescence with a rise time determined by exciton-exciton scattering. For low densities, when the distance between excitons is much larger than their diameter, the temporal shape is independent of density and rises quadratically, in excellent agreement with recent theories for resonant Rayleigh scattering.
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页码：2228 / 2231
页数：4
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