Journal article
Modulation of Cathodoluminescence by Surface Plasmons in Silver Nanowires
ACY Liu, TJ Davis, T Coenen, S Hari, LM Voortman, Z Xu, G Yuan, PM Ballard, AM Funston, J Etheridge
Small | WILEY-V C H VERLAG GMBH | Published : 2023
Abstract
The waveguide modes in chemically-grown silver nanowires on silicon nitride substrates are observed using spectrally- and spatially-resolved cathodoluminescence (CL) excited by high-energy electrons in a scanning electron microscope. The presence of a long-range, travelling surface plasmon mode modulates the coupling efficiency of the incident electron energy into the nanowires, which is observed as oscillations in the measured CL with the point of excitation by the focused electron beam. The experimental data are modeled using the theory of surface plasmon polariton modes in cylindrical metal waveguides, enabling the complex mode wavenumbers and excitation strength of the long-range surface..
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Awarded by Faculty of Science, Monash University
Funding Acknowledgements
A.C.Y.L. and T.J.D. contributed equally to this work. The authors acknowledge the use of the instruments and scientific and technical assistance at the Monash Centre for Electron Microscopy, a Node of Microscopy Australia. This research used equipment funded by Australian Research Council grant (LE140100104). A.C.Y.L. acknowledges funding from the Australian Research Council (FT180100594). This work was supported by the Australian Research Council (ARC) through the ARC Centre of Excellence in Exciton Science, CE170100026. A.C.Y.L. and J.E. acknowledge support from the Australian Academy of Technology and Engineering (Global Connections Bridging Grant 414669063). A.C.Y.L. and A.F. acknowledge support from the Science Faculty, Monash University. T.C. and S.H. acknowledge funding from the European Research Council under the Eurpoean Union's Horizon 2020 research and innovation programme under grant agreement 101017720 (FET-Proactive EBEAM). The authors gratefully acknowledge the use of the SECOM and Thermo Fisher Verios 460 in Imaging Physics at TU Delft and discussions with Jacob Hoogenboom and Pieter Kruit.Open access publishing facilitated by Monash University, as part of the Wiley - Monash University agreement via the Council of Australian University Librarians.