Spatial control of hybridization-induced spin-wave transmission stop band

Franz Vilsmeier, Christian Riedel, Christian H. Back

Research output: Contribution to journalArticlepeer-review

Abstract

Spin-wave (SW) propagation close to the hybridization-induced transmission stop band is investigated within a trapezoid-shaped 200 nm thick yttrium iron garnet film using time-resolved magneto-optic Kerr effect microscopy and broadband spin-wave spectroscopy, supported by micromagnetic simulations. The gradual reduction of the effective field within the structure leads to local variations of the SW dispersion relation and results in a SW hybridization at a fixed position in the trapezoid where the propagation vanishes, since the SW group velocity approaches zero. By tuning external field or frequency, spatial control of the spatial stop band position and spin-wave propagation is demonstrated and utilized to gain transmission control over several microstrip lines.

Original languageEnglish
Article number132407
JournalApplied Physics Letters
Volume124
Issue number13
DOIs
StatePublished - 25 Mar 2024

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