Non-resonant wave front reversal of spin waves used for microwave signal processing

TL;DR

This paper demonstrates how non-resonant wave front reversal of spin waves, induced by pulsed parametric pumping, can be utilized for microwave signal processing, including spectrum analysis and active filtering.

Contribution

It introduces a novel application of non-resonant wave front reversal of spin waves for microwave signal processing tasks.

Findings

Effective use of non-resonant WFR for spectrum analysis.

Application of non-resonant WFR for active filtering with amplification.

Demonstration of pulsed parametric pumping inducing WFR in spin waves.

Abstract

It is demonstrated that non-resonant wave front reversal (WFR) of spin-wave pulses caused by pulsed parametric pumping can be effectively used for microwave signal processing. When the frequency band of signal amplification by pumping is narrower than the spectral width of the signal, the non-resonant WFR can be used for the analysis of the signal spectrum. In the opposite case the non-resonant WFR can be used for active (with amplification) filtering of the input signal.