Ultrafast all-optical magnetization reversal in GdFeCo films around plasmonic nanostructures

Vladimir Kochergin, Sergiy Cherepov, Robert N. Schwartz, Kevin Flanagan, Ilya N. Krivorotov, Evgeniy V. Kochergin, Kang L. Wang

研究成果: Conference contribution

摘要

It has recently been experimentally demonstrated that reproducible and controllable all-optical magnetization reversal in GdFeCo films can be achieved with a single ultrafast (from 40fs to 3ps) femtosecond laser pulse. While the microscopic origin of the effect is still unclear, we suggest that the effect is caused by a combination of light-induced quasi-static magnetic field, with dynamic thermal effects due to laser heating, as well as magnetic fields generated by thermoelectric effect-caused electrical currents. This finding reveals great potential for ultrafast data storage through magnetic switching without the aid of an external magnetic field. It was further recently predicted that utilization of plasmonic nanostructures may provide the way to achieve fast all-optical magnetization switching with smaller/cheaper laser sources with longer pulse durations. We will present the simulations of temporal dynamics of magnetization reversal around plasmonic nanostructures with the combination of Landau Lifshitz Bloch and finite element modeling. Our modeling results predict that plasmonic nanostructures can significantly alter all-optical magnetization switching process and may help achieve a number of technologically important effects that cannot be achieved otherwise. Results of experimental studies of optical magnetization reversal in GdFeCo films around plasmonic nanostructures are also provided.

原文English
主出版物標題Plasmonics
主出版物子標題Metallic Nanostructures and Their Optical Properties XI
發行者SPIE
ISBN(列印)9780819496591
DOIs
出版狀態Published - 2013
事件Plasmonics: Metallic Nanostructures and Their Optical Properties XI - San Diego, CA, United States
持續時間: 2013 八月 252013 八月 29

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
8809
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Conference

ConferencePlasmonics: Metallic Nanostructures and Their Optical Properties XI
國家/地區United States
城市San Diego, CA
期間13-08-2513-08-29

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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