Quantum kinetic electron-phonon interaction in GaAs: Energy nonconserving scattering events and memory effects

被引：112

作者：

Furst, C ^{[1
]}

Leitenstorfer, A ^{[1
]}

Laubereau, A ^{[1
]}

Zimmermann, R ^{[1
]}

机构：

[1] HUMBOLDT UNIV BERLIN,INST PHYS,D-10117 BERLIN,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.78.3733

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Highly energetic electrons in GaAs emitting LO phonons are studied via femtosecond transmission spectroscopy. It is demonstrated for the first time that energy is not conserved on a time scale as short as a LO oscillation period: A replica of the initial distribution starts spectrally broadened before it sharpens into the excitation shape. This scenario is repeated for every step in the phonon cascade. Simulations combining an exact solution of quantum kinetics within a simplified model and a calculation of the polarization including Coulomb effects quantitatively agree with the data.

引用

页码：3733 / 3736

页数：4

共 31 条

[1] INTERBAND QUANTUM KINETICS WITH LO-PHONON SCATTERING IN A LASER-PULSE-EXCITED SEMICONDUCTOR .2. NUMERICAL-STUDIES [J].