Ultrafast photoinduced mechanical strain in epitaxial BiFeO 3 thin films

L. Y. Chen, J. C. Yang, Chih-Wei Luo*, C. W. Laing, Kaung-Hsiung Wu, Jiunn-Yuan Lin, T. M. Uen, Jenh-Yih Juang, Ying-hao Chu, T. Kobayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We studied ultrafast dynamics and photoinduced mechanical strain of BiFeO 3 thin films by dual-color transient reflectivity measurements (ΔR/R). Anisotropic photostriction in BiFeO 3 is found to be mainly driven by the optical rectification effect. Results of the photostriction at various thicknesses show that the estimated sound velocity along [110] direction of BiFeO 3 is 4.76 km/s.

Original languageEnglish
Article number041902
Number of pages4
JournalApplied Physics Letters
Issue number4
StatePublished - 23 Jul 2012


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