Figure 6
From: Controllable Plasmonic Nanostructures induced by Dual-wavelength Femtosecond Laser Irradiation
(a) SEM images (scale bar, 500 nm) of nanostructures fabricated from 40-nm-thick Au film at slightly different laser pulse energies of 0.021, 0.022, 0.023, 0.024, 0.025, 0.032, and 0.034 μJ from top to bottom in each line. (b) Changes in the optical responses of the nanostructures are visualized by DF microscopic images (scale bar, 5 μm).
