Short-wavelength spin wave transducer

A device that produces ultra-small-wavelength spin waves, comprising:

• a base substrate;
• a transducer, comprising:
• a first plane defined by a first magnetic film;
• a second plane defined by an insulator;
• and
• a third plane defined by a plurality of metal strips;
• and
• a second magnetic film, having a spin-wave phase velocity lower than the first magnetic film, wherein the second magnetic film is adjacent to the first magnetic film,
• wherein:
• the first plane, the second plane, and the third plane are parallel, such that the third plane abuts the second plane, the second plane abuts the first plane, and the first plane abuts the base substrate,
• the plurality of metal strips are configured to receive a first signal, such that the first signal excites a first spin wave in the first magnetic film, and
• the second magnetic film is configured to produce a second spin wave having a wavelength shorter than the first spin wave.

A method to produce ultra-small-wavelength spin waves, comprising:

• placing a transducer on a base substrate, the transducer comprising:
• a first plane defined by a first magnetic film;
• and
• a second plane defined by a plurality of metal strips;
• and
• placing a second magnetic film on the base substrate, the second magnetic film having a spin-wave phase velocity lower than the first magnetic film, wherein the second magnetic film is adjacent to the first magnetic film,
• wherein the first plane and the second plane are parallel, the plurality of metal strips are configured to receive a first signal, such that the first signal excites a first spin wave in the first magnetic film, and the second magnetic film is configured to produce a second spin wave having a wavelength shorter than the first spin wave.