Coherent terahertz control of antiferromagnetic spin waves

被引：0

作者：

Kampfrath T. ^{[1
,2
,3
]}

Sell A. ^{[1
]}

Klatt G. ^{[1
]}

Pashkin A. ^{[1
]}

Mährlein S. ^{[1
]}

Dekorsy T. ^{[1
]}

Wolf M. ^{[2
]}

Fiebig M. ^{[4
]}

Leitenstorfer A. ^{[1
]}

Huber R. ^{[1
,5
]}

机构：

[1] Department of Physics, Center for Applied Photonics, University of Konstanz, 78464 Konstanz

[2] Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin

[3] FOM Institute for Atomic and Molecular Physics (AMOLF), 1098 XG Amsterdam

[4] Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn

[5] Department of Physics, University of Regensburg

来源：

Nature Photonics | 2011年 / 5卷 / 1期

关键词：

D O I：

10.1038/nphoton.2010.259

中图分类号：

学科分类号：

摘要：

Ultrafast charge and spin excitations in the elusive terahertz regime of the electromagnetic spectrum play a pivotal role in condensed matter. The electric field of free-space terahertz pulses has provided a direct gateway to manipulating the motion of charges on the femtosecond timescale. Here, we complement this process by showing that the magnetic component of intense terahertz transients enables ultrafast control of the spin degree of freedom. Single-cycle terahertz pulses switch on and off coherent spin waves in antiferromagnetic NiO at frequencies as high as 1 THz. An optical probe pulse with a duration of 8 fs follows the terahertz-induced magnetic dynamics directly in the time domain and verifies that the terahertz field addresses spins selectively by means of the Zeeman interaction. This concept provides a universal ultrafast means to control previously inaccessible magnetic excitations in the electronic ground state. © 2011 Macmillan Publishers Limited. All rights reserved.

引用

页码：31 / 34

页数：3

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