Magneto-optical response of oblate and prolate spheroidal nanoparticles of silver

Silver nanoparticles are important in technological and medical applications. The geometricaltuning of the magneto-optical property of these nanoparticles are interesting. As a result oflocalized surface plasmon resonance of these nanoparticle in the visible and near infrared, alarge circular dichroism is appeared close to surface plasmon resonance. In this paper, thecircular dichroism of oblate and prolate spheroidal nanoparticles in the presence of staticmagnetic field is studied. A large redshift is observed in the circular dichroism spectrum of thedimer of oblate spheroids. Also, the magnitude of circular dichroism in an asymmetricconfiguration of the dimer is observed in comparison to the circular dichroism of the dimer ofsame volume spherical nanoparticles, which shows the measurements are very easier.