A light field carrying multidimensional optical information, including but not limited to polarization, intensity and wavelength, is essential for numerous applications such as environmental monitoring, thermal imaging, medical diagnosis and free-space communications. Simultaneous acquisition of this multidimensional information could provide comprehensive insights for understanding complex environments but remains a challenge. Here we demonstrate a multidimensional optical information detection device based on zero-bias double twisted black arsenic–phosphorus homojunctions, where the photoresponse is dominated by the photothermoelectric effect. By using a bipolar and phase-offset polarization photoresponse, the device operated in the mid-infrared range can simultaneously detect both the polarization angle and incident intensity information through direct measurement of the photocurrents in the double twisted black arsenic–phosphorus homojunctions. The device’s responsivity makes it possible to retrieve wavelength information, typically perceived as difficult to obtain. Moreover, the device exhibits an electrically tunable polarization photoresponse, enabling precise distinction of polarization angles under low-intensity light exposure. These demonstrations offer a promising approach for simultaneous detection of multidimensional optical information, indicating potential for diverse photonic applications.

携带多维光学信息（包括但不限于偏振、强度和波长）的光场对于环境监测、热成像、医疗诊断和自由空间通信等众多应用至关重要。同时获取这种多维信息可以为理解复杂环境提供全面的见解，但仍然是一个挑战。在这里，我们展示了一种基于零偏置双扭曲黑砷磷同质结的多维光学信息检测装置，其中光响应主要由光热电效应决定。通过使用双极和相位偏移偏振光响应，在中红外范围内工作的装置可以通过直接测量双扭曲黑砷磷同质结中的光电流来同时检测偏振角和入射强度信息。该设备的响应能力使得检索通常被认为难以获得的波长信息成为可能。此外，该器件表现出电可调偏振光响应，能够在低强度曝光下精确地区分偏振角。这些演示为同时检测多维光学信息提供了一种有前景的方法，表明了多种光子应用的潜力。