▎ 摘　　要

I present calculations of reflection beamshifts, Goos-Hanchen and Imbert-Fedorov shifts, due to the presence of a graphene monolayer on a dielectric medium when using a beam with wavelength in the visible range. Measuring the Goos-Hanchen and Imbert-Fedorov shifts is an alternative method to determine graphene's conductivity. I look at beamshifts for different polarization states (p, s, 45 degrees, sigma(+)) and I discuss other possible experimental routes to determine these beamshifts and consequently, the graphene's optical conductivity. The Goos-Hanchen shifts for visible light I calculated are in good agreement with results of a recent experiment.