Interference-mediated intensity modulation of spin waves
Sankha Subhra Mukherjee, Jae Hyun Kwon, Mahdi Jamali, Masamitsu, Hayashi, and Hyunsoo Yang
TL;DR
This paper demonstrates how interference of spin waves in Ni81Fe19 films can be used to modulate their amplitude, enabling potential applications in low-power spin wave information processing.
Contribution
It introduces a method to control spin wave amplitude via interference, using pulse timing and magnetic bias, advancing spin wave modulation techniques.
Findings
Interference can modulate spin wave amplitude effectively.
Bias magnetic field influences interference outcomes.
Separation between pulses controls the resulting amplitude.
Abstract
The modulation of propagating spin-wave amplitude in Ni81Fe19 (Py) films, resulting from constructive and destructive interference of spin wave, has been demonstrated. Spin waves were excited and detected inductively using pulse inductive time domain measurements. Two electrical impulses were used for launching two interfering Gaussian spin wave packets in Py films. The applied bias magnetic field or the separation between two pulses was used for tuning the amplitude of the resulting spin wave packets. This may thus be useful for spin wave based low-power information transfer and processing.
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