Enhancing magneto-optical effects is crucial for the size reduction of key photonic devices based on non-reciprocal propagation of light and to enable active nanophotonics. In this direction, an international team lead by CIC Nanogune (Spain) theoretically proposed and experimentally demonstrated a novel conceptual roadmap to boost magnetization-induced polarization modulation using multipolar dark plasmon modes in asymmetric magnetoplasmonic nanocavities. This new conceptual design could lead to broad applications in optical communications, sensing, and imaging.
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