Storage-recovery phenomenon in magnonic crystal

TL;DR

This paper demonstrates experimentally how spin waves can be trapped and later recovered in a magnonic crystal through parametric amplification, highlighting a novel wave storage mechanism distinct from photonic crystal light slowing.

Contribution

It introduces a new wave storage method in magnonic crystals using internal mode excitation and parametric amplification, differing from photonic crystal phenomena.

Findings

Wave trapping demonstrated in magnonic crystal

Information recovery via parametric amplification

Storage based on internal mode excitation

Abstract

The phenomenon of wave trapping in an artificial crystal with limited number of periods is demonstrated experimentally using spin waves in a magnonic crystal. The information stored in the crystal is recovered afterwards by parametric amplification of the trapped wave. The storage process is based on the excitation of standing internal crystal modes and differs principally from the well-known phenomenon of deceleration of light in photonic crystals.