Bioinspired γ‐InSe Opto‐sensor Exhibiting Enhanced Visual Adaptation Mediated by Polarization Sensitivity

Abstract The sophisticated functionality of a bee's compound eye, notably its polarization sensitivity and optical adaptation, offers a robust foundation for its visual perception in an intricate world, drawing increasing attention to bionics inspired by these features. However, replicating the functions in a simple device structure while fully harnessing their complementarity in practice remains a challenge. Here, a two‐terminal opto‐sensor employing multilayer γ‐InSe flakes is developed, designed to mimic both the functions in the Ultraviolet (UV) to visible spectrum. Due to its low‐symmetry lattice, γ‐InSe exhibits pronounced in‐plane photoelectric anisotropy. Furthermore, its non‐centrosymmetric structure leads to obvious adaptive behaviors under pulsed light irradiation, primarily influenced by the photo‐conductive and photo‐pyroelectric effects. As the illumination environment varies, changes in carrier polarization within the material induce dynamic variations in the photoresponse signals. More intriguingly, by exploiting the distinct responses to polarized light, this is demonstrated, for the first time, visual adaptation imaging by which honeybees interpret light reflected from different regions of a flower (petal and center). This work underscores the importance of polarized light in enhancing device sensitivity and broadening the dimension of information perception, offering a framework for the compatible bionic utilization of both features.