Resonant waveguide-granting devices and methods for using same

Patent metadata

Field	Value
Publication number	US-10359573-B2
Application number	US-201313971737-A
Country	US
Kind code	B2
Filing date	Aug 20, 2013
Priority date	Nov 5, 1999
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

Waveguide gratings, biosensors, and methods of using a waveguide grating, including as a biosensor.

First claim

What is claimed is:

1. A method of using a waveguide grating, comprising:
contacting a waveguide grating device with a medium, the waveguide grating device comprising:
at least one waveguide having an end, the end having an endface; and
a waveguide grating fabricated on the endface of the at least one waveguide, the waveguide grating having at least one waveguide layer and at least one grating layer;

where the contacting comprises contacting the waveguide grating with the medium;
directing light through the at least one waveguide such that the light contacts the waveguide grating, the waveguide grating being configured such that:
at least one attribute of the light is consequently modified; and
a guided-mode resonance peak or minimum occurs in light that is reflected from the waveguide grating or in light that is transmitted through the waveguide grating; and

determining at least one parameter of the medium using the modified attribute.

2. The method of claim 1 , wherein the light is directed from a laser.

3. The method of claim 1 , wherein the light is directed from a broadband source.

4. The method of claim 1 , wherein the light is directed from a light emitting diode.

5. The method of claim 1 , wherein the determining involves the use of an optical spectrum analyzer.

6. The method of claim 1 , wherein the at least one attribute comprises the spectral content of the light.

7. A method of using a waveguide grating as a biosensor, comprising:
contacting a guided-mode resonance waveguide grating with a medium, the guided-mode resonance waveguide grating having at least one waveguide layer, at least one grating layer, and biologically sensitive material;
directing light from a broadband source toward the guided-mode resonance waveguide grating such that the light contacts the waveguide grating, the guided-mode resonance waveguide grating being configured such that at least one attribute of the light is consequently modified; and
determining at least one parameter of the medium using the modified attribute.

Assignees

• Univ Texas

Inventors

• Wawro Debra D
• Tibuleac Sorin
• Magnusson Robert

Classifications

• G02B6/02061

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• G01N21/648

  using evanescent coupling or surface plasmon coupling for the excitation of fluorescence · CPC title

• G01N21/7743 Primary

  the reagent-coated grating coupling light in or out of the waveguide · CPC title

• G02B6/29317

  Light guides of the optical fibre type · CPC title

• G01N2021/7776

  Index · CPC title