Non local electrodynamics of metal film systems

Abstract
A phenomenological theory of non local electrodynamics of metal/film systems is given in terms of a specularity parameter p for arbitrary 0 ≤ p ≤ 1 and applied to study the differential reflectivity of Ag films on an Al substrate. Even allowing for charge transfer across the Ag/Al interface, by far the main factor lies in the details of the dielectric response of Ag, rather than non specularity effects. Differential power absorption (related to photoyield) is also studied. Both non specularity and charge transfer have then rather more appreciable effects which could conceivably be observed