A TIME-RESOLVED RAMAN-STUDY OF INHOMOGENEOUS DEPHASING IN HIGH-PRESSURE MOLECULAR-CRYSTALS

被引：7

作者：

CROWELL, RA ^{[1
]}

CHRONISTER, EL ^{[1
]}

机构：

[1] UNIV CALIF RIVERSIDE,DEPT CHEM,RIVERSIDE,CA 92521

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 195卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(92)85570-Z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Time-resolved coherent Raman measurements at low temperature are performed on strain-free crystals at high pressure and on highly strained crystals following a pressure release. Results for several Raman modes of naphthalene and carbon disulfide are analyzed in terms of a competition between vibrational relaxation and inhomogeneous dephasing. Changes in vibrational dephasing induced by a large negative pressure change ( - DELTA-P greater-than-or-equal-to 5 kbar) are used to determine the magnitude of inhomogeneous dephasing effects. The vibrational dephasing for molecular crystals grown at high pressure in a diamond anvil cell is found to be homogeneous, whereas strain-induced inhomogeneous dephasing is found to be vibrational mode specific.

引用

页码：602 / 608

页数：7

共 37 条

[1] THEORY OF THE TIME EVOLUTION OF EXCITON COHERENCE IN WEAKLY DISORDERED CRYSTALS [J].