Abstract
Optical properties of a nanoporous membrane have been studied. A periodical array of empty and metal-filled pores reflects and scatters an incident plane wave. Noticeable differences in reflectance occur; a Maxwell–Garnett’s model of composite material has been used to recover the dielectric function of tin nanorods at λ=632.8 nm. The scattering of empty pores is larger than that of filled one’s. A consistent explanation of the optical properties has been achieved using multiple scattering and a metallic behaviour of the nanorods.
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