Magneto-optical hologram lens with microsecond focal switching in magnetic garnet

Active lenses based on metasurfaces have been demonstrated across broad applications, and their response speeds remain limited to the microsecond range.

Active lenses based on metasurfaces have been demonstrated across broad applications, and their response speeds remain limited to the microsecond range. Here we report the experimental demonstration of a magneto-optical (MO) active lens based on a magnetic hologram formed on a…