title: Waveguide-coupled surface phonon resonance sensors with super-resolution in the mid-infrared region.
abstract: A waveguide-coupled surface phonon resonance (SPhR) sensor with super-resolution based on Fano resonance (FR) by using a multilayer system within the Kretschmann configuration in the mid-infrared wavelength region is proposed. Due to the coherent interference of the waveguide and the surface phonon polariton modes, the calculated reflectivity spectrum possesses sharp asymmetric FR dips. An ultra-small linewidth is formed because of the Fano coupling, and the physical features contribute to a highly efficient nano-sensor for refractive index sensing. The bulk and surface sensitivity by intensities are greatly enhanced relative to those of conventional SPhR sensors.
authors.forename: Gaige
authors.initials: G
authors.lastname: Zheng
authors.forename: Yunyun
authors.initials: Y
authors.lastname: Chen
authors.forename: Lingbing
authors.initials: L
authors.lastname: Bu
authors.forename: Linhua
authors.initials: L
authors.lastname: Xu
authors.forename: Wei
authors.initials: W
authors.lastname: Su