Time-resolved optical observation of spin-wave dynamics

被引：39

作者：

Dodge, JS ^{[1
]}

Schumacher, AB

Bigot, JY

Chemla, DS

Ingle, N

Beasley, MR

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Karlsruhe, Inst Angew Phys, Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.83.4650

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have created a nonequilibrium population of antiferromagnetic spin waves in Cr2O3, and characterized its dynamics, using frequency- and time-resolved nonlinear optical spectroscopy of the exciton-magnon transition. We observe a time-dependent pump-probe line shape, which results from excitation induced renormalization of the spin-wave band structure. We present a model that reproduces the basic characteristics of the data, in which we postulate the optical nonlinearity to be dominated by interactions with long-wavelength spin waves, and the dynamics to be due to spin-wave thermalization.

引用

页码：4650 / 4653

页数：4

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