Numerical studies of the interaction of an atomic sample with the electromagnetic field in two dimensions

Maxim Sukharev, Abraham Nitzan

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Abstract

We consider the interaction of electromagnetic radiation of arbitrary polarization with multilevel atoms in a self-consistent manner, taking into account both spatial and temporal dependencies of local fields. This is done by numerically solving the corresponding system of coupled Maxwell-Liouville equations for various geometries. In particular, we scrutinize linear optical properties of nanoscale atomic clusters, demonstrating the significant role played by collective effects and dephasing. It is shown that subwavelength atomic clusters exhibit two resonant modes, one of which is localized slightly below the atomic transition frequency of an individual atom, while the other is positioned considerably above it. As an initial exploration of future applications of this approach, the optical response of core-shell nanostructures, with a core consisting of silver and a shell composed of resonant atoms, is examined.

Original languageEnglish (US)
Article number043802
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number4
DOIs
Publication statusPublished - Oct 3 2011

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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