Daiki Hatanaka

Oct 23, 2023 | link.aps.org | Hiroshi Yamaguchi |Daiki Hatanaka |Motoki Asano

Skyrmions are topological solitons in two-dimensional systems and have been observed in various physical systems. Generating and controlling skyrmions in artificial resonator arrays lead to novel acoustic, photonic, and electric devices, but it is a challenge to implement a vector variable with the chiral exchange interaction. Here, we propose to use quadrature variables, where their parametric coupling enables skyrmions to be stabilized.

May 22, 2023 | link.aps.org | Motoki Asano |Hajime Okamoto |Hiroshi Yamaguchi |Daiki Hatanaka

Abstract Phononic crystal (PnC) enables strong confinement of phonons in a wavelength-scale tiny area due to a band gap, which can enhance the interaction with different physical systems. Here, we utilize the PnC to demonstrate local manipulations of magnons by using ultrahigh frequency phonons confined in a phononic cavity, where the tiny and low-loss vibrations excite magnons in a micromagnet via magnetostriction.