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arXiv · 2309.07451

Phase control of magnons in the van der Waals antiferromagnet NiPS$_3$

Shingo Toyoda·Jonathon Kruppe·Kohtaro Yamakawa·James Analytis·Joseph Orenstein
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Abstract

We demonstrate phase control of magnons in the van der Waals antiferromagnet NiPS$_3$ using optical excitation by polarized light. The sign of the coherent precession of spin amplitude changes upon (1) reversing the helicity of a circularly polarized pump beam, or (2) rotating the polarization of a linearly polarized pump by $\pi/2$. Because these two excitation pathways have comparable generation efficiency, the phase of spin precession can be continuously tuned from 0 to $2\pi$ by controlling the polarization state of the pump pulse. The ability to excite magnons with a desired phase has potential applications in the design of a spin-wave phased array and ultrafast spin information processing.

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Shingo Toyoda, Jonathon Kruppe, Kohtaro Yamakawa, James Analytis, Joseph Orenstein. 2023-09-14. Phase control of magnons in the van der Waals antiferromagnet NiPS$_3$. https://arxiv.org/abs/2309.07451

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