Abstract
In this study, the preparation of graphene-nickel composite nanofilms and their linear and linear optical properties under cw regime were investigated. The films were fabricated on glass and c-Si substrates in two steps by electron beam evaporation. The surface morphology of the films showed distinctive features with smooth and rough regions related to the formation of pristine and wrinkled graphene. The complex permittivity functions of the films were calculated using Maxwell-Garnett Theory. The nonlinear optical absorption coefficient and refractive index were calculated based on the open and closed aperture z-scan measurements. Enhanced nonlinear optical properties compared to the pure nickel film were obtained. The enhancement is explained in terms of the participation of the graphene’s π-electrons in the d-band plasmonic oscillation.
Published Version
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