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A team of researchers from the Moscow Institute of Physics and Technology (MIPT), the Russian Quantum Center, Saratov State University, and Michigan Technological University has demonstrated a method for controlling spin waves in nanostructured bismuth iron garnet films using short laser pulses. The technique has potential for applications in energy-efficient information transfer and spin-based quantum computing.
The film used in the study had an elaborate structure: a smooth lower layer with a one-dimensional grating formed on top, with a 450-nm period. That geometry enabled the excitation of magnons with a very specific spin distribution, which is not possible for an unmodified film.
The laser pump pulse generates magnons by…
