Tunable local surface plasmon resonance (LSPR) enhancement properties of cavity-nanoparticle scaffold-based clusters were investigated via finite-difference time-domain (FDTD) simulations. Hollow Au-cylinder-based and hollow Au-sphere-based nanocomposites models were presented with calculated optical spectra, near-field distribution, and average enhancement. Focusing on surface curvature, concave and convex Au-surface/Au-nanoparticles were built for further understanding on the local shape dependency in complicate scaffold-based clusters. Tunable near-field enhancement contributions and scaffold-dependency were discussed for potential in plasmonic applications such as surface-enhanced Raman spectroscopy (SERS), LSPR sensor, and nanoantenna.

通过有限差分时域（FDTD）模拟研究了基于腔纳米颗粒支架的簇的可调谐局部表面等离子体共振（LSPR）增强特性。提出了基于空心金圆柱和基于空心金球的纳米复合材料模型，并计算了光谱，近场分布和平均增强。着眼于表面曲率，构建了凹凸的Au表面/ Au纳米颗粒，以进一步了解复杂的基于支架的簇中的局部形状依赖性。讨论了可调谐的近场增强贡献和支架依赖性，以用于等离子应用中的潜力，例如表面增强拉曼光谱（SERS），LSPR传感器和纳米天线。