In the past decades

researchers fabricated high refractive index (n) polymer optical materials by introducing aromatic rings

sulfur-containing groups

halogens except uorine and organometallic moieties.However

the refractive index of these pure polymer materials is usually below 1.80.Incorporation of high-n nanoparticles into polymer matrices seems to be a more promising strategy to achieve a refractive index higher than 1.80.And these high refractive index polymer-inorganic optical hybird materials have many promising applications in optical design and advanced optoelectronic fabrication due to its excellent performance combining the properties of polymer and inorganic materials.This article summarizes the general design principles

different fabrication approaches of high RI nanocomposites and reviews recent research advances and some important optical applications of these nanocomposites.