1D Sb<sub>2</sub>S<sub>3</sub> with Strong Mie Resonance Toward Highly‐Sensitive Polarization‐Discriminating Photodetection and Its Application in High‐Temperature‐Proof Imaging and Dual‐Channel Communications
Yuhang Ma, Churong Ma, Huaxin Yi, Huanrong Liang, Wan Wang, Zhaoqiang Zheng, Yichao Zou, Zexiang Deng, Jiandong Yao, Guowei Yang
Abstract
Abstract High‐speed and sensitive UV–Vis photodetectors have been constructed based on a typical 1D van der Waals material, antimony sulfide (Sb 2 S 3 ). Impressively, the Sb 2 S 3 nanowire photodetector demonstrates pronounced photosensitivity exhibiting a remarkable on/off ratio of ≈2800 under a power density of 318 mW cm −2 . In addition, a high responsivity, an outstanding detectivity, and a short response/recovery time of 270 A W −1 , 4.37 × 10 13 Jones, and 10/12 ms are achieved. The competitive photosensitivity is associated with the intrinsic Mie resonance of the Sb 2 S 3 nanowire, which is conducive to enhancing the coupling of the Sb 2 S 3 photosensitive channel with incident light. By virtue of the unique 1D structural nature in both intrinsic and extrinsic perspectives, the Sb 2 S 3 nanowire photodetectors manifest distinct polarization‐discriminating photoresponse with the optimal dichroic ratio reaching ≈7.2. Moreover, the Sb 2 S 3 nanowire photodetectors demonstrate stable photoresponse from room temperature to 160 °C, and these nanodevices are durable against long‐term high‐temperature heating treatment at up to 300 °C. Taking advantage of the excellent thermal robustness, high‐temperature‐proof optoelectronic imaging and dual‐channel optical communication applications are demonstrated based on low‐dimensional van der Waals materials. On the whole, this study provides a new option for an advanced multifunctional optoelectronic system in extreme working environments.