15 January 2007 Importance of free surfaces for damage crater formation
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Abstract
The presence of a nearby free surface means the morphology of surface damage sites is inevitably different from that of bulk damage sites. In both, the material is subject to compressive stress waves from the initial release of laser energy. However, reflection at the free surface leads to a tensile stress wave. Because material strength is much less against tension than compression, surface sites will be more extensive than bulk sites, all else being equal. We analyze the extent of damage as a function of the amount and position of energy released and compare to experimental results.
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M. D. Feit, M. D. Feit, A. M. Rubenchik, A. M. Rubenchik, "Importance of free surfaces for damage crater formation", Proc. SPIE 6403, Laser-Induced Damage in Optical Materials: 2006, 64030A (15 January 2007); doi: 10.1117/12.696343; https://doi.org/10.1117/12.696343
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