Wang Yufan, Lai Zijie, Tang Senyao, Wang Jiaxuan, Zhou Qiyuan, Li Shuhan, Wang Weiqi, Zhao Huijuan, Yu Yuanfang, Gao Li
State Key Laboratory of Flexible Electronics (LoFE) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
School of Science, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
Small. 2025 Aug;21(34):e2503599. doi: 10.1002/smll.202503599. Epub 2025 Jul 4.
Two dimensional (2D) materials with anisotropic optoelectronic properties provide a feasible solution for polarization photodetectors, however, it is challenging to achieve simultaneous high responsivity, fast photoresponse, and good anisotropic ratio of the photocurrent (I/I). In this work, a polarization-sensitive photodetector based on ReS/MoSe van der Waals heterostructures is constructed for type-II energy band alignment with a clean contact interface. Under 532 nm laser irradiation, the photodetector has both high responsivity (89.4 A W), high-speed response (≈30.5 µs/≈36.2 µs), and high anisotropy ratio of 3.23. The performance of the device has been enhanced for multifunctional applications, including single-pixel polarization imaging and encrypted optical communication by combining Morse code with polarization encoding, demonstrating its potential in polarization-related optical information applications.
具有各向异性光电特性的二维（2D）材料为偏振光电探测器提供了一种可行的解决方案，然而，要实现同时具有高响应度、快速光响应以及良好的光电流各向异性比（I/I）具有挑战性。在这项工作中，基于ReS/MoSe范德华异质结构构建了一种偏振敏感光电探测器，用于具有清洁接触界面的II型能带排列。在532nm激光照射下，该光电探测器具有高响应度（89.4 A/W）、高速响应（≈30.5 μs/≈36.2 μs）以及3.23的高各向异性比。通过将莫尔斯码与偏振编码相结合，该器件的性能已得到增强，可用于多功能应用，包括单像素偏振成像和加密光通信，证明了其在偏振相关光信息应用中的潜力。
