Self-powered linear polarization-sensitive photodetectors based on ReS₂/MoSe₂ heterojunction

Polarization-sensitive photodetectors can sense the polarization states of light. Traditional polarization-sensitive photodetectors usually require the incorporation of extra optical components such as polarizers and waveplates, resulting in bulky device and complex structure, which fails to meet the demand for miniaturization of devices. In this work, we have demonstrated linear polarization-sensitive photodetectors based on twisted stacked ReS₂/MoSe₂ heterojunctions. Due to the formation of built-in electric field caused by the heterojunctions, the photodetectors can achieve optical response under zero bias voltage, with a maximum responsivity of0.17 A/W and a specific detectivity of 6×10⁹ Jones. Meanwhile, photodetectors fabricated by combining two twisted stacked ReS₂/MoSe₂ heterojunctions can realize detection of arbitrary linear polarized light within a wide wavelength range of 600~800 nm. This study provides a simple method for self-powered linear polarization-sensitive photodetectors.