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. © 2017 IOP Publishing Ltd.
Titolo: | Relaxation lifetimes of plasmonically enhanced hybrid gold-carbon nanotubes systems |
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Data di pubblicazione: | 2017 |
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Handle: | http://hdl.handle.net/20.500.12079/1497 |
Appare nelle tipologie: | 1.1 Articolo in rivista |