Probing the Dynamic Response of 2D Ferroelectric Domains Using Transient Reflection Spectroscopy

Two-dimensional (2D) ferroelectric materials offer a fascinating platform for exploring domain dynamics and their influence on electronic and optical properties. In this study, we investigate the ultrafast response of crystallographic domains in PVD grown tin sulfide (SnS) crystals using pump-probe transient reflection spectroscopy. Our results reveal pronounced transient reflection signals localized at domain boundaries, in contrast to the no response observed within single-domain regions. These findings underscore the pivotal role of domain boundaries in dictating the material’s optical response. Possible origins of the ultrafast response from the domain boundary will be discussed.