Laser modification of silica, simulating pulse shape and length |
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Authors: | L René Corrales Emily Moore |
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Affiliation: | Departments of Materials Science and Engineering, and Chemistry, The University of Arizona, Tucson, Arizona 85721, USA |
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Abstract: | Computer simulations of instantaneous thermal heating due to a laser pulse is modeled as a pulse occurring over 1 or 100 fs, during which time the atoms within a cylinder are given excess kinetic energy to mimic the effect of adding energy locally to a system by a laser. The response of the material under conditions in which a similar amount of energy is dumped within 1 fs versus over a 100 fs pulse with two distinct shapes, square and Gaussian-like, is explored. Key physics disclosed is that with a pulse width of 100 fs, as the energy is being added it begins to dissipate away from region where it is added. With a 1 fs (instantaneous) pulse there is greater initial ballistic behavior than when it is dumped over a 100 fs period. In the latter, there are localized hot spots displaying ballistic behavior. |
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Keywords: | 34 10 +x 34 50 Rk 61 80 Az 61 82 Ms |
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