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Plasmonic nanoantenna for energy-efficient All-Optical Switching

Maxime Vergès1, Julius Hohlfeld1, Michel Hehn1, Stéphane Mangin1, Artëm Larin2, Roman Savelev2, Dmitry Zuev2, Colas Joannin3
1Université de Lorraine, Institut Jean Lamour, Nancy, France
2ITMO University, St. Petersburg 197101, Russia
3COMSOL France SAS, Grenoble, France
Published in 2020

Our goal is to create plasmons to enhance All Optical Switching (AOS) of the magnetization. We used a finite-element model in order to understand the impact of plasmonic disk-shaped nanoantennas on magneto-optical effects. We first tested our model without an antenna and compare it with analytical solutions .The plasmonic nanoantenna tends to enhance the energy absorption in the layers, especially the magnetic layer, but also induces a field confinement around the antenna. These results sound promising for developing energy-efficient plasmonic magneto-optical devices.

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