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Rapid solidification dynamics in amorphous germanium films melted by nanosecond laser pulses has been analyzed by means of single-shot subnanosecond time resolved reflectivity measurements using a streak camera based setup. The results show that once a minimum melt depth is induced, a bulk solidification process followed by the release of the solidification enthalpy dominates the solidification scenario. Moreover, the laser-melted material solidifies completely before being remelted as a consequence of the solidification enthalpy release, something only observed, up to date, upon irradiation with picosecond laser pulses.
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Armengol et al. (2003) studied this question.
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