Patent ID: 7920267

Claim:
A planar integrated surface plasmon resonance (SPR) sensing device comprising: a substrate having an array of individual plural planar integrated surface plasmon resonance sensors for monitoring multiple biological or chemical reactions simultaneously, the plurality of planar integrated surface plasmon resonance sensors not directly interfaced with one another, each surface plasmon resonance sensor comprising: a planar optical waveguide fabricated on a surface of the first side of the substrate, the optical waveguide having an input and an output; a wavelength tunable emitter on a same surface of the substrate coupled with the input of a corresponding planar optical waveguide wherein the wavelength of the emitted light is varied to obtain a transmission spectrum of light which passes through a sensing region for detecting variations in a refractive index by monitoring a maximum absorption peak shift in a wavelength domain; a photodetector formed on the same surface of the substrate coupled with the output of the corresponding planar optical waveguide for measuring a transmitted intensity of light exiting the output of the corresponding planar optical waveguide; and a SPR sensor area consisting of a metal layer formed over a section of the optical waveguide and a dielectric layer deposited on the metal layer formed on the first side of the substrate coupled with a section of the corresponding planar optical waveguide between the corresponding wavelength tunable emitter and the corresponding photodetector for spectral mode type sensing to measures spectrum change in optical frequency domain, wherein each optical waveguide routes a light from the corresponding wavelength tunable emitter past the corresponding sensor area which evanescently penetrates each SPR sensor area wherein when the surface plasmon wavelength and the guided mode of the optical waveguide are matched the light source excites the surface plasmon at the outer surface of the SPR sensor area and it is absorbed, each SPR sensor area targeting a different target analytes, the array monitoring multiple biological or chemical reactions simultaneously.