Concept of the Optomagnonic Logic Operation

Kolosvetov, A.A.; Kozhaev, M. A.; Savochkin, I. V.; Belotelov, V. I.; Chernov, A. I.

doi:10.1103/physrevapplied.18.054038

Cited by 12 publications

(2 citation statements)

References 30 publications

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“…Magnonics aims to use quanta of spin waves, magnons, to carry, transport and process information, avoiding the dissipation of energy inherent to electronics 14 , 15 . However, despite the successful demonstration of magnon-based logic operations 16 , a magnon transistor 17 and the achievement of magnon frequency multiplication 18 , so far the performance of magnonics has been restricted to the gigahertz frequency range and millimetre-size devices. The use of antiferromagnetic materials instead of conventional ferromagnets represents a breakthrough because of the very high (terahertz) frequency, nanometre-scale wavelength and fast velocities of their magnons 1 , 2 , 19 .…”

Section: Mainmentioning

confidence: 99%

Canted spin order as a platform for ultrafast conversion of magnons

Leenders,

Afanasiev,

Kimel

et al. 2024

Nature

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Traditionally, magnetic solids are divided into two main classes—ferromagnets and antiferromagnets with parallel and antiparallel spin orders, respectively. Although normally the antiferromagnets have zero magnetization, in some of them an additional antisymmetric spin–spin interaction arises owing to a strong spin–orbit coupling and results in canting of the spins, thereby producing net magnetization. The canted antiferromagnets combine antiferromagnetic order with phenomena typical of ferromagnets and hold great potential for spintronics and magnonics1–5. In this way, they can be identified as closely related to the recently proposed new class of magnetic materials called altermagnets6–9. Altermagnets are predicted to have strong magneto-optical effects, terahertz-frequency spin dynamics and degeneracy lifting for chiral spin waves10 (that is, all of the effects present in the canted antiferromagnets11,12). Here, by utilizing these unique phenomena, we demonstrate a new functionality of canted spin order for magnonics and show that it facilitates mechanisms converting a magnon at the centre of the Brillouin zone into propagating magnons using nonlinear magnon–magnon interactions activated by an ultrafast laser pulse. Our experimental findings supported by theoretical analysis show that the mechanism is enabled by the spin canting.

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Section: Mainmentioning

confidence: 99%

Canted spin order as a platform for ultrafast conversion of magnons

Leenders,

Afanasiev,

Kimel

et al. 2024

Nature

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“…In ferromagnets, in which magneto-static spin waves have microscale wavelengths, the propagating magnons can be excited by strongly focused laser pulses [40][41][42] . If the excitation torque is confined to a region with a size smaller than the magnon wavelength, this magnon will propagate away from the excitation spot.…”

Section: I: Introductionmentioning

confidence: 99%

Theory of optical generation and detection of propagating magnons in an antiferromagnet

Leenders

Mikhaylovskiy

2023

Phys. Rev. B

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We report a theory of optical generation and detection of the propagating spin waves in antiferromagnetic materials relevant for the ultrafast pump-probe experiments. We derive and solve the equations of motion for antiferromagnetic spins in response to the light-induced effective magnetic field in the linear regime.Different forms of the excitation and the properties of the generated spin waves are analysed. We theoretically show the selective detection of the spin waves by the magneto-optical Kerr effect. The developed formalism is readily applicable to inform future experiments on antiferromagnetic opto-magnonics.

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