Time- and power-dependent operation of a parametric spin-wave amplifier

被引：27

作者：

Braecher, T. ^{[1
]}

Heussner, F.

Pirro, P.

Fischer, T.

Geilen, M.

Heinz, B.

Laegel, B.

Serga, A. A.

Hillebrands, B.

机构：

[1] Tech Univ Kaiserslautern, Fachbereich Phys, D-67663 Kaiserslautern, Germany

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 23期

关键词：

Brillouin scattering - Binary alloys - Parametric amplifiers - Optical pumping - Iron alloys;

D O I：

10.1063/1.4904078

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the experimental observation of the localized amplification of externally excited, propagating spin waves in a transversely in-plane magnetized Ni81Fe19 magnonic waveguide by means of parallel pumping. By employing microfocussed Brillouin light scattering spectroscopy, we analyze the dependency of the amplification on the applied pumping power and on the delay between the input spin-wave packet and the pumping pulse. We show that there are two different operation regimes: At large pumping powers, the spin-wave packet needs to enter the amplifier before the pumping is switched on in order to be amplified while at low powers the spin-wave packet can arrive at any time during the pumping pulse. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 19 条

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