Terahertz-Driven Nonlinear Spin Response of Antiferromagnetic Nickel Oxide

被引：121

作者：

Baierl, S. ^{[1
]}

Mentink, J. H. ^{[2
]}

Hohenleutner, M. ^{[1
]}

Braun, L. ^{[3
]}

Do, T. -M. ^{[1
]}

Lange, C. ^{[1
]}

Sell, A. ^{[4
,5
]}

Fiebig, M. ^{[6
]}

Woltersdorf, G. ^{[7
]}

Kampfrath, T. ^{[3
]}

Huber, R. ^{[1
]}

机构：

[1] Univ Regensburg, Dept Phys, D-93053 Regensburg, Germany

[2] Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands

[3] Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, Faradayweg 4-6, D-14195 Berlin, Germany

[4] Univ Konstanz, Dept Phys, Lochhamer Schlag 19, D-82166 Grafelfing, Germany

[5] TOPTICA Photon AG, Lochhamer Schlag 19, D-82166 Grafelfing, Germany

[6] Swiss Fed Inst Technol, Dept Mat, Vladimir Prelog Weg 4, CH-8093 Zurich, Switzerland

[7] Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Germany

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 19期

基金：

欧洲研究理事会;

关键词：

MAGNETIZATION; ULTRAFAST; RESONANCE; DYNAMICS; GENERATION; WAVES; FIELD;

D O I：

10.1103/PhysRevLett.117.197201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Terahertz magnetic fields with amplitudes of up to 0.4 Tesla drive magnon resonances in nickel oxide while the induced dynamics is recorded by femtosecond magneto-optical probing. We observe distinct spin-mediated optical nonlinearities, including oscillations at the second harmonic of the 1 THz magnon mode. The latter originate from coherent dynamics of the longitudinal component of the antiferromagnetic order parameter, which are probed by magneto-optical effects of second order in the spin deflection. These observations allow us to dynamically disentangle electronic from lattice-related contributions to magnetic linear birefringence and dichroism-information so far only accessible by ultrafast THz spin control. The nonlinearities discussed here foreshadow physics that will become essential in future subcycle spin switching.

引用

页数：6

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