DEFORMABLE INTERFEROMETRIC SENSOR

摘要

There is described a deformable interferometric sensor in which polymer swelling, upon analyte absorption, is used to deform an on-chip silicon Fabry-Perot interferometer (FPI). The magnitude of the deformation, recorded through the resonance wavelength shift, is proportional to the analyte concentration.

主权项

1. A deformable interferometric sensor comprising:
a pair of parallel and spaced apart reflectors forming a Fabry-Perot cavity, each one of the reflectors having an outer surface and an inner surface, the pair of reflectors separated by a distance L; an optical fiber interfaced with the outer surface of each one of the reflectors and having an optical axis that intersects the pair of reflectors; and a polymer provided between the reflectors, the polymer exhibiting expansion along the optical axis of the optical fiber upon absorption of at least one analyte, and inducing a shift of a resonance wavelength substantially proportional to a concentration of the at least one analyte as absorbed, the expansion causing an increase in the distance L between the reflectors and deforming the Fabry-Perot cavity.