Silica nanorod-array films with very low refractive indices.

Xi, J Q; Kim, Jong Kyu; Schubert, E F · Nano Lett · 2005

basic_science · Level V

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Abstract

The refractive-index contrast is an important figure of merit for dielectric multilayer structures, optical resonators, and photonic crystals. This represents a strong driving force for novel materials that have refractive indices lower than those of conventional optically transparent materials. Silica nanorod-array dielectric films with unprecedented low refractive indices of 1.08 are demonstrated and shown to have viable optical properties including enhanced reflectivity of a single-pair distributed Bragg reflector.

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