Spin Wave Propagation in a System of Laterally Coupled Mach-Zehnder Interferometers

Abstract

In the context of growing data volumes, finding new computing architectures for high-performance and energy-efficient digital signal processing is becoming critical. Magnons, the quanta of spin waves, enable information transmission without electron transport, making it possible to implement Boolean logic operations on principles that go beyond traditional CMOS technologies. Compared to information transmission via electric currents, the use of spin waves offers additional advantages: the absence of resistive losses and a wide frequency range from GHz to THz. The development of thin-film fabrication techniques enables the creation of micro- and nanostructures, which serve as the basis for signal processing devices in magnonic networks. The use of yttrium iron garnet films as a material for spin-wave guide channels allows for the creation of extended magnonic computing devices due to a record-low SW damping coefficient.
We investigate the spin wave propagation in a structure comprising coupled Mach-Zehnder interferometers and a transversely confined waveguide is investigated using micromagnetic simulation. It is shown that changing the distance between the coupled interferometers affects spin wave interference, allowing control over the transfer efficiency. Furthermore, it is demonstrated that the inhomogeneity of the internal magnetic field profile influences spin wave transmission characteristics. The dependence of magnetostatic spin wave propagation on the variation of the structure's magnetization direction was also investigated. The proposed configuration implements spatial-frequency selection and can serve as a single-channel demultiplexer, as well as a foundation for logic devices in integrated magnonics.

Speaker

Ilya R. Klokov
Saratov State University, Saratov, Russia
Russia

Discussion

Ask question