Time-domain Brillouin imaging of sound velocity and refractive index using automated angle scanning

作者：Motonobu Tomoda, Akihisa Kubota, Osamu Matsuda, Yoshihiro Sugawara, Oliver B. Wright · 发表于：Photoacoustics · 年份：2023 · DOI：10.1016/j.pacs.2023.100486 · 被引用次数：8 · 研究领域：Ultrasonics and Acoustic Wave Propagation、Photoacoustic and Ultrasonic Imaging、Flow Measurement and Analysis

We present a picosecond optoacoustic technique for mapping both the longitudinal sound velocity v and the refractive index n in solids by automated measurement at multiple probe incidence angles in time-domain Brillouin scattering. Using a fused silica sample with a deposited titanium film as an optoacoustic transducer, we map v and n in the depth direction. Applications include the imaging of sound velocity and refractive index distributions in three dimensions in inhomogeneous samples such as biological cells.