Reconfigurable heat-induced spin wave lenses
Reconfigurable heat-induced spin wave lenses
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DOI：
10.1063/1.4971829
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发表时间：
2016-12-05
影响因子：
4
通讯作者：
Demokritov, S. O.
中科院分区：
文献类型：
--
作者：
Dzyapko, O.;Borisenko, I. V.;Demokritov, S. O.
利用局部激光诱导加热的方法研究了钇铁石榴石薄膜中自旋波的控制和操纵。我们表明，由于自旋波在热梯度中的折射，加热区域充当戴蒙-埃什巴赫自旋波的离焦透镜，并作为后体积波的聚焦透镜，使自旋波光束在后一种情况下能够准直。除了聚焦/散焦功能外，局部加热允许人们操纵自旋波光束的传播方向，并利用焦散效应有效地抑制其衍射传播。AIP出版社出版。
We study the control and manipulation of propagating spin waves in yttrium iron garnet films using a local laser-induced heating. We show that, due to the refraction of spin waves in the thermal gradients, the heated region acts as a defocusing lens for Damon-Eshbach spin waves and as a focusing lens for backward volume waves enabling collimation of spin-wave beams in the latter case. In addition to the focusing/defocusing functionality, the local heating allows one to manipulate the propagation direction of the spin-wave beams and to efficiently suppress their diffraction spreading by utilizing caustic effects. Published by AIP Publishing.