US Patent 7944781 - Flexible waveguide including nanoparticles

http://www.freepatentsonline.com/7944781.html

This patent teaches a flexible waveguide for optical recording systems in which nanoparticles are used to improve the areal density of data storage. Claim 1 reads:

1. A flexible waveguide, comprising:

a core layer having a core material with a first index of refraction; and

a plurality of nanoparticles contained in the core layer, each of the nanoparticles having a second index of refraction that is greater than the first index of refraction of the core material.