Electrically Tunable Polarization‐Responsivity in MoTe ₂ /Ta ₂ NiSe ₅ van der Waals Heterojunctions

Ultra‐compact on‐chip polarization photodetectors offer unique device concepts, yet mainstream polarization ratio optimization strategies have typically compromised responsivity. This work demonstrates an optimization of polarization‐response characteristics in anisotropic van der Waals heterostructures (MoTe 2 /Ta 2 NiSe 5 ) through gate‐tunable band alignment engineering. Reveal a correlation between the on‐off state and the polarization‐responsivity relationship in photodetectors, which may enable high‐contrast polarization imaging and improved angular discrimination without the need for external polarizers or complex pixelated architectures. Capitalizing on its simple structure, robust tunability, and pronounced PR‐PAS relationship, this work demonstrates an electrically tunable polarization‐sensitive photodetection behavior, showing promising potential for polarization imaging, optical communication, and polarization‐state monitoring.