Polarization-resolved photodetectors, a significant branch of photodetection, can more effectively distinguish the target from the background by exploiting polarization-sensitive characteristics. However, due to the absence of intrinsic polarized absorption properties of many materials, there is still a great challenge to develop the high-performance polarization-resolved photodetectors. Here, we report a van der Waals heterojunction (vdWH) ReSe₂/WSe₂ photodetector, which performs a high responsivity of ~0.28 A/W and a high detectivity of 1.1 10¹² Jones under the illumination of 520 nm laser at room temperature. Remarkably, scanning photocurrent mapping (SPCM) measurements demonstrate the photoresponse of devices closely depend on the polarized angle of the incident light, indicating the effective polarized light detection. This work paves the way to develop high-performance polarization-resolved photodetectors based on two-dimensional (2D) materials.

偏振分辨光电探测器是光电探测的一个重要分支，可以通过利用偏振敏感特性更有效地将目标与背景区分开来。然而，由于许多材料缺乏固有的偏振吸收特性，开发高性能的偏振分辨光电探测器仍然面临着巨大的挑战。在这里，我们报告了范德华异质结 (vdWH) ReSe ₂ /WSe ₂光电探测器，它具有约 0.28 A/W 的高响应度和 1.1 10 ^{12的高探测度}琼斯在室温下 520 nm 激光照射下。值得注意的是，扫描光电流映射 (SPCM) 测量表明器件的光响应密切依赖于入射光的偏振角，表明有效的偏振光检测。这项工作为开发基于二维 (2D) 材料的高性能偏振分辨光电探测器铺平了道路。