Cavity Effect of Gold Nanoparticles on Mid-Infrared Light.

ABSTRACT: Nanophotonics has attracted wide attention in photonic devices and biotechnology. Interaction of visible and near-infrared lights with metal nanoparticles (NPs) is already well explored, leading to a mount of applications, especially in high-sensitivity biodetection. However, the effects of metal NPs on mid-infrared (MIR) light are still lacking because the light cannot resonantly excite the surface electron oscillation of the NPs. Recently, gold NP (AuNP)-assisted experiments indicate that AuNPs can be used in the detection of MIR biophotons, but the underlying mechanism remains unclear. Here, constructing a cavity by two AuNPs and performing finite difference time domain simulations based on Maxwell equations, we demonstrate that even if the AuNP dimension is significantly smaller than t

SUBMITTER: Yu W 

PROVIDER: S-EPMC11966571 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature