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Nonlocal optical effects on the Goos-Hänchen shift at an interface of a composite material of metallic nanoparticles — A simple model approach

A vacuum layer over the surface of local metallic nanoparticles (MNP) is used to reproduce the effect of nonlocality in the Goos-Hänchen(GH) shift of reflected light from a composite material of metallic nanoparticles. The thickness of the vacuum layer for reproduced nonlocal GH shift is tuned accurately compared to the GH shift of the Maxwell-Garnett nonlocal effective medium model.