Imperial College London
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ProfessorWillBranford

Faculty of Natural Sciences, Department of Physics

Professor of Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 6674w.branford Website

 
 
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Location

 

912Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Stenning:2023:10.1016/j.xcrp.2023.101291,
author = {Stenning, KD and Xiao, X and Holder, HH and Gartside, JC and Vanstone, A and Kennedy, OW and Oulton, RF and Branford, WR},
doi = {10.1016/j.xcrp.2023.101291},
journal = {Cell Reports Physical Science},
pages = {1--15},
title = {Low-power continuous-wave all-optical magnetic switching in ferromagnetic nanoarrays},
url = {http://dx.doi.org/10.1016/j.xcrp.2023.101291},
volume = {4},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - All-optical magnetic switching promises ultrafast magnetizationcontrol without a magnetic field. Existing schemes typically requirepower-hungry femtosecond-pulsed lasers and complex magneticmaterials. Here, we demonstrate deterministic, all-optical magneticswitching in simple ferromagnetic nanomagnets (Ni81Fe19, Ni50Fe50)with sub-diffraction limit dimensions using a focused low-power,linearly polarized continuous-wave laser. Isolated nanomagnetsare switched across a range of dimensions, laser wavelengths, andpowers. All square-geometry artificial spin ice vertex configurationsare written at low powers (2.74 mW). Usually, switching with linearlypolarized light is symmetry forbidden; here, the laser spot has asimilar size to the nanomagnets, producing an absorption distribution that depends on the nanoisland-spot displacement. We attribute the deterministic switching to the transient dynamics of thisasymmetric absorption. No switching is observed in Co or Ni nanostructures, suggesting the multi-species nature of NiFe plays a role.These results usher in inexpensive, low-power, optically controlleddevices with impact across data storage, neuromorphic computation, and reconfigurable magnonics.
AU  - Stenning,KD
AU  - Xiao,X
AU  - Holder,HH
AU  - Gartside,JC
AU  - Vanstone,A
AU  - Kennedy,OW
AU  - Oulton,RF
AU  - Branford,WR
DO  - 10.1016/j.xcrp.2023.101291
EP  - 15
PY  - 2023///
SN  - 2666-3864
SP  - 1
TI  - Low-power continuous-wave all-optical magnetic switching in ferromagnetic nanoarrays
T2  - Cell Reports Physical Science
UR  - http://dx.doi.org/10.1016/j.xcrp.2023.101291
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000961529900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.sciencedirect.com/science/article/pii/S2666386423000504
UR  - http://hdl.handle.net/10044/1/106710
VL  - 4
ER  -
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