Time-domain investigation of phonon-polaritons in GaP

被引：0

作者：

Hebling, J ^{[1
]}

Stepanov, A

Seres, J

Kuhl, J

机构：

[1] Univ Pecs, Exp Phys Dept, Pecs, Hungary

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[3] Juhasz Gyula Coll, Dept Phys, Szeged, Hungary

来源：

FERROELECTRICS | 2001年 / 249卷 / 1-2期

关键词：

phonon-polariton; ISRS; GaP; anharmonic phonon decay;

D O I：

10.1080/00150190108214971

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Impulsive simulated Raman scattering with fs optical pulses is applied to investigate the frequency dependence of phonon-polariton lifetimes in GaP. Three different frequency dependent decay channels are determined for polariton modes in the frequency range 335-364 cm(-1) which can be attributed to anharmonic decay of the polariton into acoustic phonons (LA+TA) at the x and K points of the Brillouin zone. Besides one-phonon (TO and LO) excitations, we observe also two-phonon (2TA) contributions to the signal.

引用

页码：99 / 105

页数：7

共 10 条

[1] DIELECTRIC DISPERSION AND PHONON LINE SHAPE IN GALLIUM PHOSPHIDE [J].