title: Au-Graphene Hybrid Plasmonic Nanostructure Sensor Based on Intensity Shift.
abstract: Integrating plasmonic materials, like gold with a two-dimensional material (e.g., graphene) enhances the light-material interaction and, hence, plasmonic properties of the metallic nanostructure. A localized surface plasmon resonance sensor is an effective platform for biomarker detection. They offer a better bulk surface (local) sensitivity than a regular surface plasmon resonance (SPR) sensor; however, they suffer from a lower figure of merit compared to that one in a propagating surface plasmon resonance sensors. In this work, a decorated multilayer graphene film with an Au nanostructures was proposed as a liquid sensor. The results showed a significant improvement in the figure of merit compared with other reported localized surface plasmon resonance sensors. The maximum figure of merit and intensity sensitivity of 240 and 55 RIU-1(refractive index unit) at refractive index change of 0.001 were achieved which indicate the capability of the proposed sensor to detect a small change in concentration of liquids in the ng/mL level which is essential in early-stage cancer disease detection.
authors.affiliation: Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada. r2alharb@uwaterloo.ca.
authors.forename: Raed
authors.initials: R
authors.lastname: Alharbi
authors.affiliation: Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada. mehrdad.irannejad@uwaterloo.ca.
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Irannejad
authors.affiliation: Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada. myavuz@uwaterloo.ca.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yavuz
keywords: LSPR sensor; graphene; hybrid nanostructure; intensity shift; sensitivity