1D Sb₂S₃ with Strong Mie Resonance Toward Highly‐Sensitive Polarization‐Discriminating Photodetection and Its Application in High‐Temperature‐Proof Imaging and Dual‐Channel Communications

Abstract

High‐speed and sensitive UV–Vis photodetectors have been constructed based on a typical 1D van der Waals material, antimony sulfide (Sb2S3). Impressively, the Sb2S3 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 × 1013 Jones, and 10/12 ms are achieved. The competitive photosensitivity is associated with the intrinsic Mie resonance of the Sb2S3 nanowire, which is conducive to enhancing the coupling of the Sb2S3 photosensitive channel with incident light. By virtue of the unique 1D structural nature in both intrinsic and extrinsic perspectives, the Sb2S3 nanowire photodetectors manifest distinct polarization‐discriminating photoresponse with the optimal dichroic ratio reaching ≈7.2. Moreover, the Sb2S3 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.

Emerging Schemes for Advancing 2D Material Photoconductive-Type Photodetectors

“…For example, 2DLMs possess excellent flexibility, making them suitable for developing wearable optoelectronic devices for a wealth of functionalities (e.g., health monitoring [209], e-eye [210], ultraviolet radiation warning [7,211]). In addition, many 2DLMs exhibit pronounced in-plane anisotropy, and they can thus be applied to polarized photodetectors, enabling emerging optoelectronic applications such as multiplexing optical communications [212], enhanced contrast imaging [213], etc.…”