The paper presents a novel multi-dimensional optical information detection device based on twisted black arsenic-phosphorus (b-AsP) homojunctions. The device operates at room temperature and zero bias, utilizing the photothermoelectric effect. By employing bipolar and phase-offset polarization photoresponse, the device can simultaneously detect both the polarization angle and incident intensity of mid-infrared (MIR) light. The device's responsivity allows for the retrieval of wavelength information, which is typically challenging to obtain. Additionally, the device exhibits electrically tunable polarization photoresponse, enabling precise polarization angle distinction under low light intensity exposure. The device's responsivity, detectivity, and response speed at zero bias are approximately 50 mA/W, 1.2 × 10^9 cm·Hz^0.5/W, and 20 μs, respectively. The responsivity can be enhanced to 150 mA/W by applying a gate field, improving the accuracy of polarization angle discrimination. The device demonstrates highly accurate image reconstruction of multi-dimensional information, making it a promising platform for compact, miniaturized, and multifunctional photodetectors. The study also includes demonstrations of multi-dimensional optical information imaging and wavelength-dependent polarization detection, highlighting the device's potential in various applications such as polarimetric imaging, environmental monitoring, and free-space communications.The paper presents a novel multi-dimensional optical information detection device based on twisted black arsenic-phosphorus (b-AsP) homojunctions. The device operates at room temperature and zero bias, utilizing the photothermoelectric effect. By employing bipolar and phase-offset polarization photoresponse, the device can simultaneously detect both the polarization angle and incident intensity of mid-infrared (MIR) light. The device's responsivity allows for the retrieval of wavelength information, which is typically challenging to obtain. Additionally, the device exhibits electrically tunable polarization photoresponse, enabling precise polarization angle distinction under low light intensity exposure. The device's responsivity, detectivity, and response speed at zero bias are approximately 50 mA/W, 1.2 × 10^9 cm·Hz^0.5/W, and 20 μs, respectively. The responsivity can be enhanced to 150 mA/W by applying a gate field, improving the accuracy of polarization angle discrimination. The device demonstrates highly accurate image reconstruction of multi-dimensional information, making it a promising platform for compact, miniaturized, and multifunctional photodetectors. The study also includes demonstrations of multi-dimensional optical information imaging and wavelength-dependent polarization detection, highlighting the device's potential in various applications such as polarimetric imaging, environmental monitoring, and free-space communications.