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Phys Rev Lett. 2011 Jan 28;106(4):047401. Epub 2011 Jan 24.

Selection rules for light-induced magnetization of a crystal with threefold symmetry: the case of antiferromagnetic NiO.

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  • 1Department of Applied Physics, The University of Tokyo and CREST-JST, Tokyo, Japan.

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.

PMID:
21405359
[PubMed]
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