Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2Te3 films

@inproceedings{Li2010CoherentOP,
  title={Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2Te3 films},
  author={Yuwei Li and Vladimir A. Stoica and L. John Endicott and Guoyu Wang and Ctirad Uher and Roy Clarke},
  year={2010}
}
We performed time-resolved reflectivity measurements to monitor changes in optical phonon modes in Sb2Te3 thin films under femtosecond laser irradiation. We found that a phonon mode at 3.64 THz appears after high-fluence laser irradiation, in addition to the phonon modes of Sb2Te3. We determined that the additional mode is due to Te segregation as a result of laser-induced decomposition of the Sb2Te3 film. This experiment clearly illustrates the irreversible effects of femtosecond laser… CONTINUE READING