Large-area metal-dielectric heterostructures for surface-enhanced raman scattering

作者：Shu-Ting Shen, Jingyu Wang, Yue-Zhou Zhu, Weimin Yang, Renxian Gao, Jian‐Feng Li, Guoya Sun, Zhilin Yang · 发表于：Optics Express · 年份：2022 · DOI：10.1364/oe.464631 · 被引用次数：5 · 研究领域：Plasmonic and Surface Plasmon Research、Gold and Silver Nanoparticles Synthesis and Applications、Optical Coatings and Gratings

Metal-dielectric heterostructures have shown great application potentials in physics, chemistry and material science. In this work, we have designed and manufactured ordered metal-dielectric multiple heterostructures with tunable optical properties, which can be as large as the order of square centimeters in size. We experimentally realized that the surface-enhanced Raman scattering signal of the periodic multiple heterostructures increased 50 times compared with the silicon nanodisk-gold film arrays, which is attributed to the large-scale hotspots and high efficient coupling between the optical cavities and surface plasmon resonance modes. More importantly, the substrate also features a good uniformity and an excellent reproducible fabrication, which is very promising for practical applications.