Real-time imaging of acoustic waves in bulk materials with X-ray microscopy.

ABSTRACT: The dynamics of lattice vibrations govern many material processes, such as acoustic wave propagation, displacive phase transitions, and ballistic thermal transport. The maximum velocity of these processes and their effects is determined by the speed of sound, which therefore defines the temporal resolution (picoseconds) needed to resolve these phenomena on their characteristic length scales (nanometers). Here, we present an X-ray microscope capable of imaging acoustic waves with subpicosecond resolution within mm-sized crystals. We directly visualize the generation, propagation, branching, and energy dissipation of longitudinal and transverse acoustic waves in diamond, demonstrating how mechanical energy thermalizes from picosecond to microsecond timescales. Bulk characterization technique

SUBMITTER: Holstad TS 

PROVIDER: S-EPMC10523471 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature