Surface Plasmons in Silicon Nanowires

Plasmon resonances (PRs) in metallic nanostructures have been extensively studied, whereas reports on PR silicon nanowires (Si NWs) are very few, partial, and they refer to structures larger than 100 nm. Discrete Si NWs with core sizes as small 30 nm at high resolution observed. They attributed plasmonic identifying two groups, the traveling waves, exhibiting discrete modes along NW length for several orders of harmonics, localized generated by transverse oscillations diameter, observing them best our knowledge first time (SiNWs) every size. The experimental findings coupled modeling, confirming data adding further insights into NW's embedding medium role. A plasmon‐induced resonant cavity opens markets material processing, photodetectors, novel plasmon‐based nano‐optics, thanks intense optical energy delivery below diffraction limit addition exceptional integration capacity silicon.