Expanding Effective-Medium Theory to Optical Diamagnetic Responses in Magnetoplasmonic Colloids
Ondřej Vlašín, Oana Pascu, Anna Roig, and Gervasi Herranz.
Phys. Rev. Applied 2, 054003
We show that very diluted dispersions of ferromagnetic metal nanoparticles in diamagnetic hosts show a large, linear response under an applied magnetic field, which is of interest for emerging applications in sensing, integrated optical communications, and magneto-optical current transformers and transducers. We present also a theory that describes accurately these results and that can be further extended to describe the optical properties of e.g., metal inclusions in polymers or glasses.