Terahertz Optomagnetism: Nonlinear THz Excitation of GHz Spin Waves in Antiferromagnetic FeBO_{3}.

Autor: Mashkovich EA; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands., Grishunin KA; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.; MIREA-Russian Technological University, Moscow 119454, Russia., Mikhaylovskiy RV; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.; Department of Physics, Lancaster University, Bailrigg, Lancaster LA1 4YW, United Kingdom., Zvezdin AK; Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow 119991, Russia.; Moscow Institute of Physics & Technology, Dolgoprudnyi 141700, Russia., Pisarev RV; Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St Petersburg, Russia., Strugatsky MB; Physics and Technology Institute, V.I. Vernadsky Crimean Federal University, 295007 Simferopol, Russia., Christianen PCM; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.; High Field Magnetic Laboratory (HFML-EFML), Radboud University, 6525 ED Nijmegen, The Netherlands., Rasing T; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands., Kimel AV; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2019 Oct 11; Vol. 123 (15), pp. 157202.
DOI: 10.1103/PhysRevLett.123.157202
Abstrakt: 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 FeBO_{3}. 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.
Databáze: MEDLINE