Light-induced injection of hot carriers from gold nanoparticles to carbon wire bundles

Stella Kutrovskaya; Igor Chestnov; Anton Osipov; Vlad Samyshkin; Anastasya Lelekova; Alexey Povolotskiy; Xiaoqing Zhou; Alexey Kavokin; Alexey Kucherik

arXiv · 2212.12956

Light-induced injection of hot carriers from gold nanoparticles to carbon wire bundles

Stella Kutrovskaya·Igor Chestnov·Anton Osipov·Vlad Samyshkin·Anastasya Lelekova·Alexey Povolotskiy·Xiaoqing Zhou·Alexey Kavokin·Alexey Kucherik

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Abstract

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.

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Stella Kutrovskaya, Igor Chestnov, Anton Osipov, Vlad Samyshkin, Anastasya Lelekova, Alexey Povolotskiy, Xiaoqing Zhou, Alexey Kavokin, Alexey Kucherik. 2022-12-25. Light-induced injection of hot carriers from gold nanoparticles to carbon wire bundles. https://arxiv.org/abs/2212.12956

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