Electronic structure and optical properties of metallic nanoshells

Details Electronic structure and optical properties of metallic nanoshells Electronic structure and optical properties of metallic nanoshells

2003-07-11

arxiv.org/abs/cond-mat/0307289v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1117/12.511665

The electronic structure and optical properties of metallic nanoshells are investigated using a jellium model and the Time Dependent Local Density Approximation (TDLDA). An efficient numerical implementation enables applications to nanoshells of realistic size with up to a million electrons. We demonstrate how a frequency dependent background polarizability of the jellium shell can be included in the TDLDA formalism. The energies of the plasmon resonances are calculated for nanoshells of different sizes and with different dielectric cores, dielectric embedding media, and dielectric shell backgrounds. The plasmon energies are found to be in good agreement with the results from classical Mie scattering theory using a Drude dielectric function. A comparison with experimental data shows excellent agreement between theory and the measured frequency dependent absorption spectra.

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