Stimulated amplification of propagating spin waves
arXiv:2208.11455 · doi:10.1103/PhysRevLett.131.156701
Abstract
Spin-wave amplification techniques are key to the realization of magnon-based computing concepts. We introduce a novel mechanism to amplify spin waves in magnonic nanostructures. Using the technique of rapid cooling, we create a non-equilibrium state in excess of high-energy magnons and demonstrate the stimulated amplification of an externally seeded, propagating spin wave. Using an extended kinetic model, we qualitatively show that the amplification is mediated by an effective energy flux of high energy magnons into the low energy propagating mode, driven by a non-equilibrium magnon distribution.
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Cited by in corpus (6)
- Spin wave-driven variable-phase mutual synchronization in spin Hall nano-oscillators
- Anisotropy-assisted magnon condensation in ferromagnetic thin films
- Local temperature control of magnon frequency and direction of supercurrents in a magnon Bose-Einstein condensate
- Nonlocal damping of spin waves in a magnetic insulator induced by normal, heavy, or altermagnetic metallic overlayer: A Schwinger-Keldysh field theory approach
- Highly efficient coherent amplification of zero-field spin waves in YIG nano-waveguides
- Enhancement of magnon flux toward a Bose-Einstein condensate