NONTHERMALIZED DISTRIBUTION OF ELECTRONS ON PICOSECOND TIME SCALE IN GAAS

被引：58

作者：

SNOKE, DW

RUHLE, WW

LU, YC

BAUSER, E

机构：

[1] Max-Planck-Institut F̈r Festkörperforschung

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.68.990

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed the thermalization of conduction electrons in GaAs from a Gaussian to a Maxwell-Boltzmann distribution, by time-resolved observation of the band-to-acceptor luminescence following a short (5 ps) near-resonant laser pulse of very low excitation power. At electron density less than 10(14)/cm3 the thermalization of the electron energy distribution occurs on a time scale of 50 ps with a rate independent of density. At higher density, thermalization occurs via electron-electron scattering with a total cross section of approximately 6 x 10(-12) cm2.

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页码：990 / 993

页数：4

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