2022/12/25 by S. Kutrovskaya, I. Yu. Chestnov, Kutrovskaya, Stella +15
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2212.12956
openalex publication_date 2022/12/25 · openalex created_date 2023/01/06 · openalex updated_date 2026/07/28
We observed a light-induced enhancement of the tunneling current propagating through an array of parallel carbon chains anchored between gold nanoparticles (NPs). In the presence of laser radiation characterized by a wavelength close to the plasmon resonance of the NPs, the current-voltage characteristics of carbon bundle tunnelling junctions demonstrate a pronounced asymmetry between positive and negative bias values. Such an asymmetry is typical for a Schottky junction, in general. The resistance of the tunnel junction decreases with the increase of the optical pumping intensity. We associate the observed effect with an injection of `hot' carriers created in Au NPs due to the decay of the surface plasmons accompanied by the charge transfer to the carbon bundles. The observed phenomenon can be used for non-resonant excitation of excitonic states in low-dimensional carbon-based structures for single-photon emission, as well as for photovoltaic applications.