Plasmonic properties of metallic nanoparticles (NPs) that are embedded in a silica matrix were investigated using the discrete dipole approximation (DDA) method. Plasmonic NPs can be embedded in a semiconductor matrix using experimental methods such as ion-implantation technique. In this study, the optical properties of the spherical and rod-shaped Au, Ag, and Cu NPs were simulated. By calculating the influence of size and shape on the plasmonic properties of the single embedded NPs, the study has revealed that rod-shaped Ag NPs produce higher extinction, greater scattering quantum yield, and stronger field enhancement in comparison to the Au and Cu. Also, due to plasmonic coupling in the dimeric structures, the rod-shaped Ag NPs show stronger plasmonic properties when compared to the monomeric structures and other dimeric structures. This study provides a quantitative guide for the selection of embedded plasmonic NPs for their potential applications, such as metal-fluorescence enhancement and energy harvesting.

使用离散偶极近似（DDA）方法研究了嵌入二氧化硅基质中的金属纳米颗粒（NPs）的等离子体性能。可以使用诸如离子注入技术的实验方法将等离子NP嵌入半导体基质中。在这项研究中，模拟了球形和棒状Au，Ag和Cu NP的光学特性。通过计算尺寸和形状对单个嵌入式NP的等离子体特性的影响，研究表明，与Au和Cu相比，棒状Ag NP产生更高的消光性，更大的散射量子产率以及更强的场增强。而且，由于二聚体结构中的等离激元偶联，与单体结构和其他二聚体结构相比，棒状Ag NPs显示出更强的等离激元性质。