Generation of spin wave packets by reconfigurable magnonic heterojunctions

TL;DR

This paper demonstrates how reconfigurable nano-magnonic heterojunctions can actively modulate spin wave packets, enabling tunable magnonic band structures and frequency combs, advancing nano-magnonics for future applications.

Contribution

It introduces a numerical method to actively reconfigure magnonic band structures using heterojunctions, enabling dynamic control of spin wave propagation.

Findings

Active band structure modification achieved

Magnonic amplitude modulation demonstrated

Generation of magnonic frequency combs

Abstract

Nano-magnonic crystals are magnetic waveguides whose magnetic parameters are modulated at the nanoscale. The super-lattice structure enables a band structure and magnonic band-gaps. Here, we numerically investigate the field tunability of such a magnonic band-gap. By subjecting different parts of the nano-magnonic crystal to a field, we realize a magnonic heterojunction. A numerical demonstration of an active modification of the band structure leads to magnonic amplitude modulation in the linear regime and magnonic frequency combs in the nonlinear regime. Our results offer further opportunities for nano-magnonic crystals and incite their experimental realization.