Refractive index sensing platform based on surface waveguides photoinscribed with few-cycle laser pulses

Le résumé fourni par la source

Optical refractive index sensing requires access to the evanescent component of a confined electromagnetic field. In this paper, we use few-cycle laser pulses focused on a grazing incidence scheme to produce surface waveguides onto the surface of a planar-fused silica sample and demonstrate that the waveguides obtained can be used as refractive index sensors. In the first arrangement, the analyte is directly placed on top of the waveguide. In a second approach, the fabricated optical microstructures are used to demonstrate a waveguide-coupled surface plasmon resonance sensor. The results presented here demonstrate the feasibility of an optical platform featuring immediate access to the evanescent field by direct laser photoinscription.

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