The optics of colloidal silver: something old and something new

Abstract The remarkable optical properties of metallic silver give rise not only to the brilliant colors exhibited by colloidal silver but also to a variety of other phenomena. Recently noted phenomena such as absorption and scattering effects, luminescence, photophoresis, and surface-enhanced Raman scattering are reviewed. New results are presented illustrating color effects, photoelectron emission, light emission from tunnel junctions and evanescent fields at the surface of an optical fiber.

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