Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2 Te3 films

Yuwei Li, Vladimir A. Stoica, Lynn Endicott, Guoyu Wang, Ctirad Uher, Roy Clarke

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We performed time-resolved reflectivity measurements to monitor changes in optical phonon modes in Sb2 Te3 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 Sb 2 Te3. We determined that the additional mode is due to Te segregation as a result of laser-induced decomposition of the Sb2 Te3 film. This experiment clearly illustrates the irreversible effects of femtosecond laser irradiation during the measurement of coherent optical phonon dynamics in Sb2 Te3.

Original languageEnglish (US)
Article number171908
JournalApplied Physics Letters
Volume97
Issue number17
DOIs
StatePublished - Oct 25 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2 Te3 films'. Together they form a unique fingerprint.

Cite this