"Laser Ablation Crater in Sapphire"

Dr Scott MacLaren. University of Illinois at Urbana-Champaign (United States)

Image Description:
Crater in an annealed sapphire substrate hit with a femtosecond laser pulse, followed by re-annealing to develop the internal step structure. Steps on the surface are 3 Angstrom atomic steps. A small chunk was blown out of the center of the crater.


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