Abstract
The localized surface plasmon resonance (LSPR) properties of Au/Ag/graphene nanoshells are studied by discrete dipole approximation (DDA). The coupled resonance wavelengths show a remarkable dependence on the graphene thickness as well as refractive index of the surrounding medium. The resonance wavelengths of Au/Ag/graphene nanoshells red-shift as the thickness of the graphene layer is increased, when the radii of the Au core and Ag interlayer are 40[Formula: see text]nm and 45[Formula: see text]nm, respectively. Specifically, the longer wavelength red-shifts from 540[Formula: see text]nm to 740[Formula: see text]nm when the refractive index varies from 1.25 to 2.05.
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