Modeling and Analysis of Absorption and Scattering Characteristics of Ag Nanoparticles at Quantum Scale

The localized surface plasmon resonance effect of precious metal nanoparticles can enhance their absorption of visible light, making them of significant application value in solar photovoltaic cells, filters and other fields. However, as the size of nanoparticles decreases, there is a discrepancy between the predicted values of classical electromagnetic theory and experimental observations, indicating that classical electromagnetic theory will no longer be applicable and a quantum scale correction model needs to be established for calculations. This article takes spherical and rod-shaped Ag nanoparticles at the quantum scale as the research object, and models and analyzes their absorption and scattering characteristics through numerical simulation methods. The research results indicate that the calculation results of the modified model show a significant shift in the position of the absorption peak compared to the classical model, and the peak value decreases significantly. The absorption peak of rod-shaped Ag nanoparticles can be effectively optimized to the visible light band and has a high absorption factor value.