A Nonlocal Description Of The Dispersion Relation And The Energy Flow Associated With Surface Electromagnetic Waves On Metals

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Abstract
The nonlocal dispersion relation for electromagnetic surface waves on a metal-vacuum surface, obtained within the framework of the semiclassical infinite-barrier model, is reviewed. Limiting ourselves to the hydrodynamic approach, which allows collective excitations in the electron gas only, we have for the first time determined and identified the branches of the nonlocal dispersion relation, completely. Also, we address the question of how to treat the stationary energy flow associated with electromagnetic surface waves in the nonlocal regime.

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