Ultrafast optical excitation of coherent magnons in antiferromagnetic NiO

Christian Tzschaschel, Kensuke Otani, Ryugo Iida, Tsutomu Shimura, Hiroaki Ueda, Stefan Günther, Manfred Fiebig, Takuya Satoh

研究成果: Contribution to journalArticle査読

42 被引用数 (Scopus)

抄録

In experiment and theory, we resolve the mechanism of ultrafast optical magnon excitation in antiferromagnetic NiO. We employ time-resolved optical two-color pump-probe measurements to study the coherent nonthermal spin dynamics. Optical pumping and probing with linearly and circularly polarized light along the optic axis of the NiO crystal scrutinizes the mechanism behind the ultrafast magnon excitation. A phenomenological symmetry-based theory links these experimental results to expressions for the optically induced magnetization via the inverse Faraday effect and the inverse Cotton-Mouton effect. We obtain striking agreement between experiment and theory that, furthermore, allows us to extract information about the spin domain distribution. We also find that in NiO the energy transfer into the magnon mode via the inverse Cotton-Mouton effect is about three orders of magnitude more efficient than via the inverse Faraday effect.

本文言語英語
論文番号174407
ジャーナルPhysical Review B
95
17
DOI
出版ステータス出版済み - 5 5 2017

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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