Anomalous spectral scaling of light emission rates in low dimensional metallic nanostructures

Details Anomalous spectral scaling of light emission rates in low dimensional metallic nanostructures Anomalous spectral scaling of light emission rates in low dimensional metallic nanostructures

2011-04-20

arxiv.org/abs/1104.3946v2

Physics

Optics

Scientific paper

The strength of light emission near metallic nanostructures can scale anomalously with frequency and dimensionality. We find that light-matter interactions in plasmonic systems confined in two dimensions (e.g., near metal nanowires) strengthen with decreasing frequency owing to strong mode confinement away from the surface plasmon frequency. The anomalous scaling also applies to the modulation speed of plasmonic light sources, including lasers, with modulation bandwidths growing at lower carrier frequencies. This allows developing optical devices that exhibit simultaneously femto-second response times at the nano-meter scale, even at longer wavelengths into the mid IR, limited only by non-local effects and reversible light-matter coupling.

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