Research:

Magnetoplasmonics in Graphene Systems

Magnetoplasmonics in Graphene Systems

Magnetoplasmonics, one of the recent research fields combines magnetism and plasmonics and has applications in sensing (gas sensors,biosensors), communication (nanoantenna), THz applications ( tunable THz isolator, THz polarization converter), in magnetic memory storage(MRAM) etc. Noble metals (eg. Au and Ag ) shows plasmonic property at extremely high magnetic fields whereas ferromagnetic metals possess large MO activity. But due to the high absorption of ferromagnetic metals, the associated plasmon responses are broad and propagation losses are high. So a combination of noble metal(with plasmonic property) and ferromagnetic(with MO activity) gives a magnetoplasmonic structure. The analysis of a magnetoplasmonic structure is done by studying its magneto-optical (MO) and plasmonic properties.

Though the noble metals are regarded as the best available plasmonic materials,the devices fabricated from these suffer from larger Ohmic losses and non-tunability.So instead of noble metals,we are planning to use graphene as the plasmonic material.Graphene plasmonics has become an alternative to traditional metal plasmonics due to its extreme confinement,tenability by doping and low losses. In this study, we are planning to form a magnetoplasmonic structure by combining graphene with a magnetic material in layer form and evaluate its MO and plasmonic properties. The proposed work is based on the synthesis and characterization of hybrids of magnetic material /GO composites and MO studies.