Abstract
Circularly polarized plasmon modes in spheroidal nanoshells are studied. These plasmon modes are promising for all-optical magnetic recording. The formulas for the resonance wavelengths of these plasmon modes, their steady-state resonance amplitudes, and off-resonance excitations are derived. It is demonstrated that spheroidal nanoshells are superior to spherical nanoshells as far as the nanoscale focusing of circularly polarized light and the enhancement of its intensity are concerned.
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