Time- and momentum-resolved probe of heat transport in photo-excited bismuth

J. Chen*, M. Trigo, S. Fahy, É D. Murray, Yu-Miin Sheu, T. Graber, R. Henning, Y. J. Chien, C. Uher, D. A. Reis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We use time- and momentum-resolved x-ray scattering to study thermalization in a photo-excited thin single crystal bismuth film on sapphire. The time-resolved changes of the diffuse scattering show primarily a quasi-thermal phonon distribution that is established in 100 ps and that follows the time-scale of thermal transport. Ultrafast melting measurements under high laser excitation show that epitaxial regrowth of the liquid phase occurs on the time-scale of thermal transport across the bismuth-sapphire interface.

Original languageEnglish
Article number181903
JournalApplied Physics Letters
Issue number18
StatePublished - 6 May 2013


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