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Morphological changes induced by laser irradiation on a silver thin film at the percolation transition: (a) starting configuration, (b) after 1 pulse just above , (c) after 1 pulse just above .
Morphological changes induced by laser irradiation through a sharp edge mask on silver thin film at the transition threshold: (a) TEM image; (b) associated profile showing the morphological transition areas and thresholds; (c) associated scaled intensity field pattern extracted from the calculated theoretical diffraction intensity profile (d) using Fresnel approximation. The two transition thresholds and are represented by a dotted line and a dash-dotted line, respectively. Inset: schematics of the experimental setup.
One-dimensional stripes generated by irradiating a silver thin film at the transition threshold through a phase grating mask. Inset: schematics of the setup and diffraction profile induced by the grating.
(a) Two-dimensional square structures generated in a silver thin film at the percolation threshold through a phase grating after two irradiation pulses. After the first pulse the grating is turned by 90°; (b) 2D morphological changes obtained by irradiating through a square grid.
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