title: Ability of dynamic holography in self-assembled hybrid nanostructured silica films for all-optical switching and multiplexing.
abstract: The sol-gel method has been employed in the fabrication of easily processable mesostructured films consisting of a nonionic surfactant and silica as the inorganic component. The ability of the occluded Pluronic P123 mesostructures to solubilize guest molecules made these films ideal host matrices for organic dyes and molecular assemblies, possessing substantial nonlinear susceptibilities. These films were explored for use as the photonic layer in all-optical time-to-space converters and proved successful at increasing the optical response of the intercalated dyes to a point that would make these composite films applicable for use as the photonic layer. Recording of a dynamical grating in a single-pulse regime has been obtained. Since the dynamical grating exhibits the fast relaxation time (up to 10 ns), the nonlinear mechanism represents an electronic excitation of the photosensitive molecules. As far as the dye molecules are distributed in nanoporous silica, a model of 'gas of molecular dye' may be rightly used in order to consider nonlinear optical properties in the nanostructured hybrid films. We suppose that further improvement of the nonlinear optical nanomaterials may follow on the way to embed additional inclusions, which will not promote the heat accumulation in the host matrix and will lead to effective dissipation of the heat energy.
  78.20.-e; 42.70 -а; 42.79.
authors.affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Prospect Nauki 31, Kiev, 03128 Ukraine.
authors.forename: German
authors.initials: G
authors.lastname: Telbiz
authors.affiliation: Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, 03028 Ukraine.
authors.forename: Svitlana
authors.initials: S
authors.lastname: Bugaychuk
authors.affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Prospect Nauki 31, Kiev, 03128 Ukraine.
authors.forename: Eugen
authors.initials: E
authors.lastname: Leonenko
authors.affiliation: Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, 03028 Ukraine.
authors.forename: Liudmyla
authors.initials: L
authors.lastname: Derzhypolska
authors.affiliation: Physical Department, Taras Shevchenko National University, Prospect Glushkova 4, Kiev, 03127 Ukraine.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Gnatovskyy
authors.affiliation: Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, 03028 Ukraine.
authors.forename: Igor
authors.initials: I
authors.lastname: Pryadko
keywords: All-optical switching; Dynamical holography; Lifetime; Luminescence; Mesostructured hybrid film; Optical spectra; Rhodamine 6G; Self-assembled; Sol-gel