Abstract

A two-fluid hydrodynamic model is employed to model the spatial dispersion when both electrons and holes in semiconductors are considered. Within the two-fluid hydrodynamic model, analytical solutions to the nonlocal responses of cylindrical multilayered concentric and eccentric nanowires are obtained using the Mie theory and the scattering matrix method, which are also validated by finite element simulations. It is demonstrated that the greater the geometric asymmetry is, the stronger the acoustic resonance peaks in the extinction cross section spectra will be. In addition, charge distributions of nanowires are investigated, which reveal versatile resonance modes. We believe the proposed analytical approach provides a fast and accurate tool to rapidly analyze and optimize the optical responses of cylindrical multilayered plasmonic devices.

© 2021 Optical Society of America

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