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Plots of the measured (experiment) and calculated (model) ellipsometric spectra (Ψ and Δ) of monolayer graphene on different substrates: (a) SiO2/Si, (b) glass, and (c) quartz. (d) Refractive index n and extinction coefficient k of monolayer graphene on quartz acquired from SE analysis using different models. (e) Measured (red line) and calculated (black dashed line) transmittance spectra match perfectly within spectrophotometer accuracy (1%).
