title: Highly sensitive, localized surface plasmon resonance fiber device for environmental sensing, based upon a structured bi-metal array of nano-wires.
abstract: We demonstrate a bi-metal coated (platinum and gold or silver), localized surface plasmon resonance fiber sensor with an index sensitivity exceeding 11,900 nm/RIU, yielding an index resolution of 2×10⁻⁵ in the aqueous index regime. This is one of the highest index sensitivities achieved with an optical fiber sensor. The coatings consist of arrays of bi-metal nano-wires (typically 36 nm in radius and 20 μm in length), supported by a silicon dioxide thin film on a thin substrate of germanium, the nano-wires being perpendicular to the longitudinal axis of the D-shaped fiber.
authors.forename: Thomas
authors.initials: T
authors.lastname: Allsop
authors.forename: Ron
authors.initials: R
authors.lastname: Neal
authors.forename: Mou
authors.initials: M
authors.lastname: Chengbo
authors.forename: Kyriacos
authors.initials: K
authors.lastname: Kalli
authors.forename: David
authors.initials: D
authors.lastname: Webb
mesh_terms: D004777:Environment; D019216:Metals, Heavy; D053770:Nanowires; D055100:Optical Fibers; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D019216:Metals, Heavy