초록 ▼

The integrated-optical chemical and/or biochemical sensor comprises a resonant waveguide grating structure (1.1, 1.2, . . . ), e.g., a chirped grating. By illumination with incident light (21), a resonant electromagnetic field is excited in the grating structure (1.1, 1.2, . . . ). At least one para

The integrated-optical chemical and/or biochemical sensor comprises a resonant waveguide grating structure (1.1, 1.2, . . . ), e.g., a chirped grating. By illumination with incident light (21), a resonant electromagnetic field is excited in the grating structure (1.1, 1.2, . . . ). At least one parameter of the incident light, e.g., the angle of incidence (.theta.1) or the wavelength (.lambda.1), is varied. Light (23) excident from the grating structure (1.1, 1.2, . . . ) is detected by detectors (4.1, 4.2, . . . ). Optionally, means for providing a feedback from the detectors (4.1, 4.2, . . . ) to the light sources may be provided, thus establishing a controlled closed-loop system. Hence independent simultaneous measurements in a multiple arrangement of such sensors (S1, S2, . . . ) is made possible. Moreover, a much higher density of sensors (S1, S2, . . . ) results.

대표청구항 ▼

1. An integrated-optical chemical and/or biochemical sensor comprising:a resonant waveguide grating structure defining a surface plane; a sensing area arranged in the immediate vicinity of the resonant waveguide grating structure and adapted for being contacted by a liquid substance; means for emitt

1. An integrated-optical chemical and/or biochemical sensor comprising:a resonant waveguide grating structure defining a surface plane; a sensing area arranged in the immediate vicinity of the resonant waveguide grating structure and adapted for being contacted by a liquid substance; means for emitting electromagnetic radiation towards the resonant waveguide grating structure; the means for emitting electromagnetic radiation comprising means for varying at least one parameter of the emitted electromagnetic radiation; the mutual arrangement of the resonant waveguide grating structure and the means for emitting electromagnetic radiation being such that the angles of incidence with respect to a normal line on said surface plane are greater than -90.degree. and smaller than +90.degree., and detector means for detecting electromagnetic radiation excident from the resonant waveguide grating structure; the mutual arrangement of the resonant waveguide grating structure and the detector means being such that the angles of excidence with respect to a normal line on said surface plane are greater than -90.degree. and smaller than +90.degree., and differ from the angles of incidence.