Recalescence after bulk solidification in germanium films melted by ns laser pulses

Rapid solidification dynamics in amorphous germanium films melted by nanosecond laser pulses was analyzed. Single-shot subnanosecond time resolved reflectivity measurements were carried out. Results showed that once a minimum depth was induced, a bulk solidification process followed by the release of solidification enthalpy was found.This work has been partially supported by the European Union in the framework of the TMR ERB FMRX CT098- 0188 ‘‘Laser Cleaning’’ Network. N.C. acknowledges the funding of the European Union through the same contract.Peer Reviewe