Patterned plasmonic nanodimers are fabricated exploiting an ultrathin porous anodic aluminum oxide membrane as a mask during angle‐resolved shadow deposition. The fabricated nanodimer arrays exhibit consistent sub‐10 nm gaps and a high particle density up to 1.0 × 10¹⁰ cm⁻² over a large area. The ultrasmall dimer gaps provide highly confined electromagnetic fields, which strongly enhance the photoluminescence (PL) emission and Raman scattering from the surrounding monolayer molybdenum disulphide (MoS₂). The ensemble PL intensity from MoS₂/dimers is enhanced by up to a factor of ≈160 by resonant excitation of the dimer modes. Anisotropic polarization‐dependent characteristics of PL and Raman from the MoS₂/dimers confirm that the dominant enhancement originates from the dimer configuration. These experiments demonstrate a facile approach for the fabrication of low‐cost high‐performance 2D material‐based optoelectronic devices.

中文翻译：

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间隙小于10 nm的高密度纳米二聚体阵列上增强单层MoS2的光致发光

图案化等离子体纳米二聚体是在角度分辨阴影沉积过程中利用超薄多孔阳极氧化铝膜作为掩模制备的。制成的纳米二聚体阵列在大面积上显示出一致的亚10纳米间隙和高达1.0×10 ¹⁰ cm ^-2的高粒子密度。超小二聚体间隙可提供高度受限的电磁场，从而极大地增强了周围的单层二硫化钼（MoS ₂）的光致发光（PL）发射和拉曼散射。通过二聚体模式的共振激发，来自MoS ₂ /二聚体的整体PL强度提高了≈160倍。MoS ₂中PL和拉曼的各向异性极化相关特性/ dimers确认主要的增强来自二聚体构型。这些实验证明了一种制造低成本，高性能，基于2D材料的光电器件的简便方法。