Optical chemical/biochemical sensor
First Claim
1. A planar optical sensor platform, comprising a support material (a), and at least one thin waveguiding layer (b), the refractive index of the support material (a) being lower than the refractive index of the waveguiding layer (b), and the sensor platform being provided with a coupling grating for coupling in radiation, characterized in that (1) the coupling grating has a structure which is produced on the support material and reproduced in the waveguiding layer, or the coupling grating has a structure which is produced in the waveguiding layer, (2) a recognition layer (c) is located on the waveguiding layer, and (3) said coupling grating has a grating period that is non-constant perpendicular to the direction of the mode propagation, or (4) said coupling grating has a constant grating period and the layer thickness of the waveguiding layer changes perpendicularly to the direction of propagation of the guided mode.
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Abstract
The invention relates to a planar ATR and evanescently exited luminescence optical sensor platform, consisting of a transducer and a recognition layer, wherein changes in the effective refractive index of the recognition layer are converted into a measurable variable in accordance with the integrated-optical light pointer principle. The invention relates also to the use of the method and to the method itself using the sensor platform, for example in label-free biosensory analysis.
235 Citations
16 Claims
- 1. A planar optical sensor platform, comprising a support material (a), and at least one thin waveguiding layer (b), the refractive index of the support material (a) being lower than the refractive index of the waveguiding layer (b), and the sensor platform being provided with a coupling grating for coupling in radiation, characterized in that (1) the coupling grating has a structure which is produced on the support material and reproduced in the waveguiding layer, or the coupling grating has a structure which is produced in the waveguiding layer, (2) a recognition layer (c) is located on the waveguiding layer, and (3) said coupling grating has a grating period that is non-constant perpendicular to the direction of the mode propagation, or (4) said coupling grating has a constant grating period and the layer thickness of the waveguiding layer changes perpendicularly to the direction of propagation of the guided mode.
Specification