title: Evanescent field waveguide sensing with subwavelength grating structures in silicon-on-insulator.
abstract: We explore, to the best of our knowledge, the potential of diffractionless subwavelength grating waveguides for sensing applications. We show that by subwavelength patterning of silicon-wire waveguides the field delocalization can be engineered to increase the sensitivity. Fully vectorial 3D-FDTD simulations confirm the sensitivity enhancement, achieving sensitivities of 0.83  RIU/RIU and 1.5·10(-3)  RIU/nm for bulk and surface sensing, respectively, which compare favorably to state-of-the-art sensing waveguides.
authors: J
authors: J
authors: Gonzalo Wangüemert-Pérez
authors: Pavel
authors: P
authors: Cheben
authors: Alejandro
authors: A
authors: Ortega-Moñux
authors: Carlos
authors: C
authors: Alonso-Ramos
authors: Diego
authors: D
authors: Pérez-Galacho
authors: Robert
authors: R
authors: Halir
authors: Iñigo
authors: I
authors: Molina-Fernández
authors: Dan-Xia
authors: DX
authors: Xu
authors: Jens H
authors: JH
authors: Schmid
mesh_terms: D004553:Electric Conductivity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008904:Miniaturization; D011874:Radiometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D012825:Silicon / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers
chemical_list: D012825:Silicon