Design and Development of a Split Ring Resonator and Circular Disc Metasurface Based Graphene/Gold Surface Plasmon Resonance Sensor for Illicit Drugs Detection

AbstractThis research introduces a novel sensor design integrating a metasurface composed of graphene and gold. The proposed sensor employs grating-assisted light coupling between a strip waveguide tailored for refractive index sensing in the detection of illicit drugs. The metasurface is composed of a polymer matrix consisting of two nanostructures, namely, a graphene matrix and a gold matrix. The structure is characterized by a structure where at least one dimension is equal to or less than one-quarter of the operational wavelength. Using plasmonic effects, the proposed sensor enhances the performance parameters of an effective sensor such as sensitivity among other crucial metrics. The sensor achieves an optimum sensitivity of 506 GHzRIU−1, with a Q factor of 14.88, an FOM of 4.079 RIU−1, and a minimal detection limit of 0.251 RIU. These results highlight the promising applications of the proposed sensor in law enforcement, forensic investigation among other areas where the detection of illicit drugs is a prerequisite.
Source: Plasmonics - Category: Biomedical Science Source Type: research