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Polarisation-dependent single-pulse ultrafast optical switching of an elementary ferromagnet

Physics

Polarisation-dependent single-pulse ultrafast optical switching of an elementary ferromagnet

H. Hamamera, F. S. M. Guimarães, et al.

This groundbreaking study by Hanan Hamamera, Filipe Souza Mendes Guimarães, Manuel dos Santos Dias, and Samir Lounis explores the intriguing reversal of magnetization in bulk nickel using a single sub-picosecond laser pulse. Unveiling the fascinating dynamics of ultrafast light-induced torques, this research paves the way for innovative optically-based spintronic devices.

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Playback language: English
Abstract
This paper demonstrates the reversal of magnetization in bulk nickel using a single sub-picosecond laser pulse. Time-dependent electronic structure simulations reveal that ultrafast light-induced torques are the underlying mechanism, effective only with circularly polarized light on a plane containing the initial magnetization orientation. The study maps the laser pulse parameter space enabling magnetization switching and reveals rich intra-atomic orbital-dependent magnetization dynamics, including transient non-collinear states. These findings open avenues for efficient optically-based spintronic devices.
Publisher
Communications Physics
Published On
Jan 11, 2022
Authors
Hanan Hamamera, Filipe Souza Mendes Guimarães, Manuel dos Santos Dias, Samir Lounis
Tags
magnetization
nickel
laser pulse
spintronics
ultrafast dynamics
polarized light
torques
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