title: Selection rules for light-induced magnetization of a crystal with threefold symmetry: the case of antiferromagnetic NiO.
abstract: We propose Raman-induced collinear difference-frequency generation (DFG) as a method to manipulate dynamical magnetization. When a fundamental beam propagates along a threefold rotational axis, this coherent second-order optical process is permitted by angular momentum conservation through the rotational analogue of the umklapp process. As a demonstration, we experimentally obtained polarization properties of collinear magnetic DFG along a [111] axis of a single crystal of antiferromagnetic NiO with micromultidomain structure, which excellently agreed with the theoretical prediction.
authors.affiliation: Department of Applied Physics, The University of Tokyo and CREST-JST, Tokyo, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Higuchi
authors.forename: Natsuki
authors.initials: N
authors.lastname: Kanda
authors.forename: Hiroharu
authors.initials: H
authors.lastname: Tamaru
authors.forename: Makoto
authors.initials: M
authors.lastname: Kuwata-Gonokami