Slow-wave hybrid magnonics based on interacting magnons and spoof surface plasmon polaritons
View Patent ↗A method for broadband, high-efficiency spin wave transduction adopts a slow-wave structure to enhance the interaction of electromagnetic waves and spin waves.
1 . A device comprising:
a spoof surface plasmon polariton (SSPP) waveguide; and
a magnetic resonator comprising a ferromagnetic insulator disposed on the SSPP waveguide, the magnetic resonator coupling with a spoof surface plasmon polariton mode of the SSPP waveguide through magnetic dipole-dipole interaction.
2 . The device of claim 1 wherein the SSPP waveguide includes a plurality of corrugations.
3 . The device of claim 2 further comprising a plurality of magnetic resonators.
4 . The device of claim 3 wherein each of the plurality or magnetic resonators is disposed at the bottom of a respective one of the plurality of corrugations.
5 . The device of claim 2 wherein the plurality of corrugations has a period of 500 micrometers.
6 . The device of claim 1 wherein the magnetic resonator comprises a ferromagnetic insulator disposed on a substrate.
7 . The device of claim 6 wherein the ferromagnetic insulator comprises epitaxial yttrium iron garnet.
8 . The device of claim 6 wherein the substrate comprises gadolinium gallium garnet.
9 . The device of claim 1 , wherein the SSPP waveguide comprises a metallic microstrip.