Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-04-17
Phys. Rev. A 84, 043802 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
re-submitted to PRA
Scientific paper
10.1103/PhysRevA.84.043802
We consider the interaction of electromagnetic radiation of arbitrary polarization with multi-level 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 shell composed of resonant atoms, is examined.
Nitzan Abraham
Sukharev Maxim
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