Time-resolved broadband impulsive stimulated Brillouin scattering in single crystal hematite

Patrick Gicala, Meixin Cheng, Tyler S. Lott, Kai Du, Sang Wook Cheong, Ariel A. Petruk, Kostyantyn Pichugin, German Sciaini

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Impulsive stimulated Brillouin scattering (ISBS) has emerged as a noninvasive means to determine the elastic properties of transparent materials. Here, we report on time-resolved broadband ISBS reflectivity measurements in single crystal hematite, α-Fe2O3. We found that the observed transient reflectivity changes are best described by the known strain propagation model (SPM) and introduced a simple derivation of the ISBS-SPM formula based on ray tracing, which accounts for the presence of the interface. Measurements at different incident probe beam angles illustrate a plausible approach toward determining the speed of sound in transparent media without any prior knowledge of their dielectric properties and vice versa.

Original languageEnglish (US)
Article number264101
JournalApplied Physics Letters
Issue number26
StatePublished - Jun 28 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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