Abstract
In this paper, we study the optical properties and surface plasmon resonance of a bimetallic core-shell spherical nanoparticle exhibiting monolayer graphene coatings. The extinction cross section (Qex) and slow light factor of this structure are investigated. The effect of coated graphene, host medium, and geometrical parameters such as the core radius and thickness of the shell on the Qex and the slow light factor are studied. The results show that the monolayer of graphene enhances the absorption and also leads to a redshift in the Qex and the slow light spectrums. These unique optical properties of bimetallic nanoparticles render them attractive for a broad range of applications such as biological sensors and optical communication devices.
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