Terahertz Magnon-Polaritons in TmFeO3

被引：72

作者：

Grishunin, Kirill ^{[1
]}

Huisman, Thomas ^{[2
]}

Li, Guanqiao ^{[2
]}

Mishina, Elena ^{[1
]}

Rasing, Theo ^{[2
]}

Kimel, Alexey V. ^{[1
,2
]}

Zhang, Kailing ^{[3
]}

Jin, Zuanming ^{[3
]}

Cao, Shixun ^{[3
]}

Ren, Wei ^{[3
]}

Ma, Guo-Hong ^{[3
]}

Mikhaylovskiy, Rostislav V. ^{[2
]}

机构：

[1] Moscow Technol Univ MIREA, Moscow, Russia

[2] Radboud Univ Nijmegen, Inst Mol & Mat, Nijmegen, Netherlands

[3] Shanghai Univ, Dept Phys, Shanghai, Peoples R China

来源：

ACS PHOTONICS | 2018年 / 5卷 / 04期

基金：

俄罗斯科学基金会; 中国国家自然科学基金; 欧洲研究理事会;

关键词：

polaritonics; magnonics; terahertz spectroscopy; antiferromagnetism; ultrafast dynamics; SPIN-REORIENTATION; TRANSITIONS;

D O I：

10.1021/acsphotonics.7b01402

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnon-polaritons are shown to play a dominant role in the propagation of terahertz(THz) waves through TmFeO3 orthoferrite, if the frequencies of the waves are in the vicinity of the quasi-antiferromagnetic spin resonance mode. Both time-domain THz transmission and emission spectroscopies reveal clear beatings between two modes with frequencies slightly above and slightly below this resonance, respectively. Rigorous modeling of the interaction between the spins of TmFeO3 and the THz light shows that the frequencies correspond to the upper and lower magnon-polariton branches. Our findings reveal the previously ignored importance of propagation effects and polaritons in such heavily debated areas as THz magnonics and THz spectroscopy of electromagnons. It also shows that future progress in these areas calls for an interdisciplinary approach at the interface between magnetism and photonics.

引用

页码：1375 / 1380

页数：11

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