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.
Highlights
Recent developments in pulsed laser techniques have enabled ultrafast optical manipulation of magnetization in solids [1,2,3,4,5,6,7,8,9,10]
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
Coherent control through Raman-induced nonlinear optical processes [1,2,3,4] has attracted interest because low-energy magnetic excitations are accessible without excess heating [5]
Summary
Recent developments in pulsed laser techniques have enabled ultrafast optical manipulation of magnetization in solids [1,2,3,4,5,6,7,8,9,10]. Selection Rules for Light-Induced Magnetization of a Crystal with Threefold Symmetry: The Case of Antiferromagnetic NiO 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.
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