Optical interrogation device and associated process

Abstract

The optical interrogation device can have a substrate; an insulating layer supported by the substrate; a plasmonic layer supported by the substrate via the insulating layer; a cavity extending across both the plasmonic layer and the insulating layer to a bottom adjacent the substrate, the cavity being sized to receive a particle; and a layer of 2D material covering the substrate and defining the bottom of the cavity. The process of optically interrogating the particle can include the layer of 2D material attracting the particle into the cavity across the upper end, and, while the particle is in the cavity, acquiring an optical signal including a spectral signature of the particle.

Dependencies are inferred from the claim text.