Magnonic beam splitter: The building block of parallel magnonic circuitry

Abstract

We demonstrate a magnonic beam splitter that works by inter-converting magnetostatic surface and backward-volume spin waves propagating in orthogonal sections of a T-shaped yttrium iron garnet structure. The inter-conversion is enabled by the overlap of the surface and volume spin wave bands. This overlap results from the demagnetising field induced along the transversely magnetised section(-s) of the structure and the quantization of the transverse wave number of the propagating spin waves (which are therefore better described as waveguide modes). In agreement with numerical micromagnetic simulations, our Brillouin light scattering imaging experiments reveal that, depending on the frequency, the incident fundamental waveguide magnonic modes may also be converted into higher order waveguide modes. The magnonic beam splitter demonstrated here is an important step towards the development of parallel logic circuitry of magnonics.

Field-Controlled Phase-Rectified Magnonic Multiplexer

“…in Refs. [13]- [14]) was used to image the propagation path of spin waves excited at the microwave frequency at different time delays after the onset of the microwave. The experiments were modelled using micromagnetic simulations performed with the Object-Oriented MicroMagnetic Framework (OOMMF) [15].…”

Spin waves in periodic antidot waveguide of complex base

“…In these systems, the difference of phases of the waves at the junction of two waveguides determines the conditions for constructive or destructive interference which corresponds to high or low level of the output signal. The more sophisticated processing of magnonics signals can be achieved in the waveguides with continuously changing width [13], in arrays of coupled waveguides [7] or in the waveguides with dynamically applied periodic magnetic field [14]. * klos@amu.edu.pl…”

“…The waveguides and transmission lines are important components of radio-frequency [1], photonic/optical [2][3][4] and magnonic [5][6][7] integrated systems for data communication and processing. The most obvious role of this element is transmission of signals between different parts of the system.…”

Spin wave propagation in a uniformly biased curved magnonic waveguide

“…Upon restricting the thin film so as to form a waveguide, the spin waves form laterally confined width modes, having sinusoidal transverse dynamic magnetization with n antinodes. The dispersion branches characterizing the multiple width modes shift in frequency, leading to an overlap of the branches corresponding to the MSSWs and BVMSWs and enabling conversion of the * Corresponding author: SadovnikovAV@gmail.com spin wave type in T junctions of magnonic waveguides [10,11].…”

“…Specifically, the MSSW propagating along the input arm converts to multiple BVMSWs [10], of different orders, propagating along the output arm. This is enabled by the overlap of the surface and volume spin wave bands, originating from the static demagnetization across the input arm [11], the 060401-2 magnetocrystalline anisotropy of YIG [33], and the lateral confinement of the propagating spin waves.…”