EXPLANATION OF ANOMALOUS POLARITON DYNAMICS IN LITAO3

被引：80

作者：

WIEDERRECHT, GP

DOUGHERTY, TP

DHAR, L

NELSON, KA

LEAIRD, DE

WEINER, AM

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

[2] BELL COMMUN RES INC,RED BANK,NJ 07701

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.51.916

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single and multiple-pulse impulsive stimulated Raman-scattering (ISRS) experiments are used to investigate the anomalously high damping rates of the lowest frequency A1 polariton in LiTaO3. The wave-vector dependence of the response reveals coupling of the polariton to a weakly Raman-active, low-frequency relaxational mode as well as to two underdamped modes of a different symmetry. Inclusion of the coupled modes yields quantitative agreement between the results and the predictions of a previously developed theory for light scattering from polaritons. © 1995 The American Physical Society.

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页码：916 / 931

页数：16

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