title: Vapor responsive one-dimensional photonic crystals from zeolite nanoparticles and metal oxide films for optical sensing.
abstract: The preparation of responsive multilayered structures with quarter-wave design based on layer-by-layer deposition of sol-gel derived Nb(2)O(5) films and spin-coated MEL type zeolite is demonstrated. The refractive indices (n) and thicknesses (d) of the layers are determined using non-linear curve fitting of the measured reflectance spectra. Besides, the surface and cross-sectional features of the multilayered structures are characterized by scanning electron microscopy (SEM). The quasi-omnidirectional photonic band for the multilayered structures is predicted theoretically, and confirmed experimentally by reflectance measurements at oblique incidence with polarized light. The sensing properties of the multilayered structures toward acetone are studied by measuring transmittance spectra prior and after vapor exposure. Furthermore, the potential of the one-dimensional photonic crystals based on the multilayered structure consisting of Nb(2)O(5) and MEL type zeolite as a chemical sensor with optical read-out is discussed.
authors.affiliation: Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 109, 1113 Sofia, Bulgaria. klazarova@iomt.bas.bg.
authors.forename: Katerina
authors.initials: K
authors.lastname: Lazarova
authors.affiliation: Laboratoire Catalyse & Spectrochimie, Université de Caen, 6, boulevard du Maréchal Juin, 14050 Caen Cedex, France. hussein.awala@ensicaen.fr.
authors.forename: Hussein
authors.initials: H
authors.lastname: Awala
authors.affiliation: Laboratoire Catalyse & Spectrochimie, Université de Caen, 6, boulevard du Maréchal Juin, 14050 Caen Cedex, France. sebastien.thomas@ensicaen.fr.
authors.forename: Sebastien
authors.initials: S
authors.lastname: Thomas
authors.affiliation: Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 109, 1113 Sofia, Bulgaria. marina@iomt.bas.bg.
authors.forename: Marina
authors.initials: M
authors.lastname: Vasileva
authors.affiliation: Laboratoire Catalyse & Spectrochimie, Université de Caen, 6, boulevard du Maréchal Juin, 14050 Caen Cedex, France. svetlana.mintova@ensicaen.fr.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Mintova
authors.affiliation: Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 109, 1113 Sofia, Bulgaria. babeva@iomt.bas.bg.
authors.forename: Tsvetanka
authors.initials: T
authors.lastname: Babeva