A composite waveguide for evanescent sensing in fluorescent binding assays comprising a substrate layer having one or more thin film waveguide channels deposited thereon. Binding molecules having the property of binding with specificity to an analyte are immobilized on the surface of the thin film channels....http://www.google.com.au/patents/US20020034457?utm_source=gb-gplus-sharePatent US20020034457 - Integrated optic waveguide immunosensor
