Abstract
Ultrafast light-induced phase transitions have been studied in a number of covalently bonded materials and with many different techniques, including time-resolved measurements of the reflectivity1−4 and of the reflected second harmonic.2,5,6 More recently, a direct observation of the disordering of a solids during melting has become possible through the use of ultrafast time- resolved X-ray diffraction7−9 While reflectivity measurements provide information only about the changes of the electronic properties, which can not be uniquely related to transient structural changes, time resolved X-ray diffraction has not yet been applied to the particular case of femtosecond excited graphite.
© 2002 Optical Society of America
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