Relaxation lifetimes of plasmonically enhanced hybrid gold-carbon nanotubes systems

Nanotechnology
M GlaeskeA Setaro

Abstract

Recently, we introduced a novel hybridization route for carbon nanotubes using gold nanoparticles, whose close proximity neatly enhances their radiative emission. Here we investigate the mechanisms behind the enhancement by monitoring the de-excitation dynamics of our π-hybrids through two-color pump-probe time-resolved spectroscopy. The de-excitation process reveals a fast component and a slow component. We find that the presence of gold prominently affects the fast processes, indicating a stronger influence of the gold nanoparticle on the intra-band non-radiative relaxation than on the inter-band recombination of the single-walled carbon nanotube. By evaluating the de-excitation times, we estimate the balance between near-field pumping and the faster metal-induced de-excitation contributions, proving the enhanced pumping to be the leading mechanism.

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Citations

Feb 21, 2018·Nanotechnology·Nabanita SaikiaRavindra Pandey
Jul 27, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A Setaro

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