Multi-target photonic biosensor, and method for manufacturing and preparing same

A component for detecting or measuring at least one specific type of biological or chemical product called a target product and supplying a light signal or electronic signal representing the presence of said target product in a biological or chemical medium to be tested, when said medium to be tested is brought into contact with a sensor, the component comprising:

• at least one optical waveguide element associated with the sensor, wherein the operation of said at least one optical waveguide is modified by the presence of said target product in the medium to be tested;
• one or more nanotubes configured to interact with said target product due to molecules called receptors which are chosen to specifically interact with or bind to said target product and are bound to said one or more nanotubes via molecules or chains of molecules of at least one polymer, called a functionalization polymer, bound to the surface of said one or more nanotubes one or more optical characteristics of said one or more nanotubes being modified by said functionalization polymer;
• said one or more nanotubes surrounding said at least one optical waveguide element over at least part of its periphery and inducing an optical coupling in a coupling portion of said at least one optical waveguide, between:
• an optical signal transmitted or received in said coupling portion of said at least one optical waveguide, and
• one or more optical characteristics of said one or more nanotubes;
• wherein the coupling portion is enclosed in or connected to an optical element that carries out an optical amplification or an optical detection of said modifications of the optical characteristics of the nanotubes;
• and
• wherein detecting or measuring said at least one target product is provided through said detection of the modifications of the optical characteristics of the nanotubes.