POROUS SILICON SUPERLATTICES

Porous silicon superlattices (PSSs) are a novel type of silicon-based heterostructures, in which the porosity varies periodically with depth . The two different types of PSSs and their techniques of formation ar e described, as are their optical properties and an example of an appl ication: a Fabry-Perot-type interference filter. In combination with l ight emitting porous silicon, PSSs are promising candidates for optoel ectronic applications based on silicon technology.