Abstract
When irradiating glasses with ultrashort laser pulses, the high cooling rates trigger a change in network structure and fictive temperature which can be studied by Raman spectroscopy. Cover figure (a) shows the Raman signature (D2 peak height) and the corresponding increase in fictive temperature as a function of the cross section of the laser induced modification. The largest fictive temperature is measured in the center of the modification decreasing outwards (as seen in cover figure 2(b)). For higher repetition rate of the laser pulses the larger fictive temperature indicates stronger heat accumulation from pulse to pulse. image
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