Magneto-Optical Activity in Nonmagnetic Hyperbolic Nanoparticles
Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza-Villalmanzo, Alexandre Dmitriev, Antonietta Parracino, Giuseppe Strangi, Francesco De Angelis, Daniele Brida, Francesco Pineider, Nicolò Maccaferri
Abstract
Active nanophotonics can be realized by controlling the optical properties of materials with external magnetic fields. Here, we explore the influence of optical anisotropy on the magneto-optical activity in nonmagnetic hyperbolic nanoparticles. We demonstrate that the magneto-optical response is driven by the hyperbolic dispersion via the coupling of metallic-induced electric and dielectric-induced magnetic dipolar optical modes with static magnetic fields. Magnetic circular dichroism experiments confirm the theoretical predictions and reveal tunable magneto-optical activity across the visible and near infrared spectral range.