Highly efficient linearly polarized LED via surface plasmon integrated with Ag nanocone metasurface

作者：Xuzheng Wang, Zhenhuan Tian, Shuheng Pei, Chuangcheng Xu, Jiadong Zhang, Xiaoping Li, Jieming Wei, Ben Jia, Feng Li, Feng Yun · 发表于：Applied Physics Letters · 年份：2025 · DOI：10.1063/5.0282759 · 被引用次数：3 · 研究领域：Plasmonic and Surface Plasmon Research、Metamaterials and Metasurfaces Applications、Photonic Crystals and Applications

Linearly polarized LEDs (LP-LEDs) hold significant potential for a wide range of advanced optoelectronic applications. Recent approaches employing single metallic gratings, with the double function of surface plasmon–quantum well (SP–QW) coupling and polarization selection, demonstrate potential for high-performance LP-LEDs. However, challenges persist in simultaneously optimizing luminous efficiency, electrical performance, and polarization degree. Therefore, we present a GaN-based blue light-emitting diode integrated with two collaborative metasurfaces, an Ag nanocone metasurface for efficiency enhancement and an Al nanograting for polarization-selective emission. Dual-structure design with collaborative functionalities resolves the trade-off between polarization selection and SP–QW coupling, while the introduction of Ag metasurface addresses the conflict between low luminous efficiency and poor electrical performance. Thereby, the fabricated LP-LED achieves highly efficient polarized emission, with an average polarization extinction ratio (ER) of 23.2 dB within ±60°, along with a 2.5-fold enhancement in efficiency and a 1.24-fold improvement in ER relative to the conventional Ag reflector design. This integrated design offers a promising route for the realization of high-efficiency, polarization-controlled optoelectronic devices, with broad implications for secure communications, advanced display technologies, optical interconnects, and biomedical diagnostics.