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Waveguide grating structure and optical measurement arrangement

  • US 9,341,573 B2
  • Filed: 10/21/2015
  • Issued: 05/17/2016
  • Est. Priority Date: 08/09/2000
  • Status: Active Grant
First Claim
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1. A sensor, comprising:

  • at least one light source for producing at least one incident light field;

    a sensor chip for interacting with at least one sample, the sensor chip comprising;

    a substrate;

    a one-dimensional or two-dimensional array of liquid holders or sample accommodating devices for accommodating at least one sample; and

    a waveguide grating structure on the substrate, the waveguide grating structure comprising at least one waveguide grating and having a one-dimensional or two-dimensional array of waveguide grating structure units or sensor locations, wherein at least one of the waveguide grating structure units or sensor locations comprises a signal sensing pad covered at least partially by a chemofunctional signal layer and a reference sensing pad covered at least partially by a chemofunctional reference layer, wherein the sample contacts the chemofunctional signal layer and the chemofunctional reference layer in a same one of the liquid holders or sample accommodating devices, wherein a sensitivity of an effective refractive index N with respective to a perturbation effect Δ

    X is the same for the signal sensing pad and the reference sensing pad, and wherein the waveguide grating structure emits at least one light field when the incident light field at least partially illuminates the waveguide grating structure;

    and at least one detector device.

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