Conceptual design of demultiplexer using coupled-gyration-mode signals in vortex-state disk arrays

摘要

We explored, by micromagnetic simulations, a novel conceptual time- and frequency-division demultiplexer using coupled-vortex-gyration-mode propagations in specially designed vortex-state arrays composed of circular- and chopped-shape disk dots. Coupled-vortex-gyration modes are characteristic of resonant excitations in given vortex-state arrays, which are controllable with bias static fields applied to given array structures as well as with different configurations of circular- and chopped-shape disks. As examples, we designed two array structures composed of five-vortex-state disk arrays of different combinations of circular and chopped shapes. By changing the direction of the in-plane bias fields, either leftward or rightward propagation of specific coupled-gyration-mode signals can be manipulated by exciting one of the coupled gyration modes of specific resonance frequency from an input disk, which allows for time- and frequency-division demultiplexing functions. This device concept offers an energy-efficient means of information processing without joule heating in cases where a low-damping magnetic material is used in micro-to-nanometer-scale magnonic circuits.