Light-induced magnetism in plasmonic gold nanoparticles

Strategies for the ultrafast optical control of magnetism have been a topic of intense research for several decades because of the potential impact in technologies such as magnetic memory 1 , spintronics 2 and quantum computation, as well as the opportunities for nonlinear optical control and modula...

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Bibliographic Details
Published in:Nature photonics 2020-06, Vol.14 (6), p.365-368
Main Authors: Cheng, Oscar Hsu-Cheng, Son, Dong Hee, Sheldon, Matthew
Format: Article
Language:English
Subjects:
140/125
639/624/399/354
639/638/440/527
Angular momentum
Applied and Technical Physics
Demagnetization
Electron gas
Faraday effect
Gold
Letter
Magnetic fields
Magnetic moments
Magnetism
Magnetization
Nanoparticles
Nonlinear control
Optical control
Physics
Physics and Astronomy
Plasmonics
Quantum computing
Quantum Physics
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Summary:Strategies for the ultrafast optical control of magnetism have been a topic of intense research for several decades because of the potential impact in technologies such as magnetic memory 1 , spintronics 2 and quantum computation, as well as the opportunities for nonlinear optical control and modulation 3 in applications such as optical isolation and non-reciprocity 4 . Here we report experimental quantification of optically induced magnetization in plasmonic gold nanoparticles due to the inverse Faraday effect. The induced magnetic moment is large under typical ultrafast pulse excitation (
ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-020-0603-3