Device and method for detecting changes in the refractive...

Details Device and method for detecting changes in the refractive... Device and method for detecting changes in the refractive...

G - Physics

01

N

G01N 21/55 (2006.01)

Patent

CA 2569703

The device for detecting changes in the refractive index of a dielectric medium comprises: at least one metallic layer (300) ready to be placed in contact with the dielectric medium (200); at least one light source (20) configured to direct transversal magnetic (TM) polarized light towards such metallic layer, so that the light is reflected on such metallic layer; coupling means (10); and at least one detector (31) configured to receive light reflected by the metallic layer and to detect at least one feature of such light. According to the invention, the metallic layer contains a ferromagnetic material. The invention also relates to a method.

L'invention porte sur un dispositif de détection des variations de l'indice de réfraction d'un milieu diélectrique comportant: au moins une couche métallique (300) prête à être mise en contact avec le milieu diélectrique (200); au moins une source lumineuse (20) dirigeant une lumière à polarisation magnétique transversale directe sur la couche métallique qui la réfléchit; un moyen de couplage (10); et au moins un détecteur (31) recevant la lumière réfléchie par la couche métallique et détectant l'une au moins des caractéristiques de ladite lumière. Selon l'invention, la couche métallique contient un matériau ferromagnétique. L'invention porte également sur le procédé associé..

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