Figure 4
From: Controllable Plasmonic Nanostructures induced by Dual-wavelength Femtosecond Laser Irradiation
Effects of pulse energy on the diameter of Au nanostructures from a 40-nm-thick Au film and b 20-nm-thick Au film. The irradiation pulse energy range for the nanostructures ranged from 0.020 to 0.029 μJ for the 40-nm-thick film and from 0.008 to 0.012 μJ for the 20-nm-thick film. The insets show SEM images of Au nanostructures produced at different pulse energies; all of the images share the same scale bar.
