Terahertz Optomagnetism:Nonlinear THz Excitation of GHz Spin Waves in Antiferromagnetic FeBO3

Mashkovich, E. A. and Grishunin, K. A. and Mikhaylovskiy, R. V. and Zvezdin, A. K. and Pisarev, R. V. and Strugatsky, M. B. and Christianen, P. C.M. and Rasing, Th and Kimel, A. V. (2019) Terahertz Optomagnetism:Nonlinear THz Excitation of GHz Spin Waves in Antiferromagnetic FeBO3. Physical review letters, 123 (15). ISSN 0031-9007

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Abstract

A nearly single cycle intense terahertz (THz) pulse with peak electric and magnetic fields of 0.5 MV/cm and 0.16 T, respectively, excites both modes of spin resonances in the weak antiferromagnet FeBO3. The high frequency quasiantiferromagnetic mode is excited resonantly and its amplitude scales linearly with the strength of the THz magnetic field, whereas the low frequency quasiferromagnetic mode is excited via a nonlinear mechanism that scales quadratically with the strength of the THz electric field and can be regarded as a THz inverse Cotton-Mouton effect. THz optomagnetism is shown to be more energy efficient than similar effects reported previously for the near-infrared spectral range.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2019 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
138566
Deposited By:
Deposited On:
05 Feb 2020 09:10
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Jul 2020 08:27