Direct Excitation of Propagating Spin Waves by Focused Ultrashort Optical Pulses

被引：88

作者：

Au, Y. ^{[1
]}

Dvornik, M. ^{[1
,2
]}

Davison, T. ^{[1
]}

Ahmad, E. ^{[1
]}

Keatley, P. S. ^{[1
]}

Vansteenkiste, A. ^{[2
]}

Van Waeyenberge, B. ^{[2
]}

Kruglyak, V. V. ^{[1
]}

机构：

[1] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[2] Univ Ghent, DyNaMat, Dept Solid State Sci, B-9000 Ghent, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 09期

基金：

欧盟第七框架计划; 英国工程与自然科学研究理事会;

关键词：

ULTRAFAST; MAGNETIZATION; DYNAMICS; MAGNONICS; REVERSAL; LIGHT;

D O I：

10.1103/PhysRevLett.110.097201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An all-optical experiment long utilized to image phonons excited by ultrashort optical pulses has been applied to a magnetic sample. In addition to circular ripples due to surface acoustic waves, we observe an X-shaped pattern formed by propagating spin waves. The emission of spin waves from the optical pulse epicenter in the form of collimated beams is qualitatively reproduced by micromagnetic simulations. We explain the observed pattern in terms of the group velocity distribution of Damon-Eshbach magnetostatic spin waves in the reciprocal space and the wave vector spectrum of the focused ultrafast laser pulse. DOI: 10.1103/PhysRevLett.110.097201

引用

页数：5

共 38 条

[1] Resonant microwave-to-spin-wave transducer [J].