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Polar plots of the HRS intensities as a function of the incident light (1907 nm) polarization angle ψ for the copper nanoparticles of diameters (a) 25 nm, (b) 55 nm and (c) 100 nm. Solid circles are the HRS intensities and the solid lines are fit to the data points using (reprinted with permission from Ref. 70, Copyright 2009, Elsevier).
