Dresden 2011 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 12: Poster

DF 12.8: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Photofunctional ruthenium sulfoxide compounds for molecular photonics — •Volker Dieckmann, Sebastian Eicke, Kristin Springfeld, and Mirco Imlau — Department of Physics, University of Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany

Ruthenium polypyridine sulfoxide compounds are promising photofunctional molecules, which comply with the key requirements of (ultra-)fast all-optical devices, e.g. in information and telecommunication industry. These small molecular compounds provide a fast phototriggered linkage isomerization located at the SO ligand into two structural metastable states. The isomerization is accompanied by a pronounced photochromism with a tremendous photosensitivity. An advantage of these compounds is their adaptability on the optical requirements (e.g. spectral sensitivity) by two possibilities: Substitution of ligands or modification of the (dielectric) environment of the complex. We highlight the optical properties of these sulfoxides in the view of material design for the field of nonlinear molecular photonics: This includes the possibility of tailoring the optical properties studied by linear and nonlinear optical spectroscopy. Dynamical control of light by optical recording of 2D-photonic structures is verified by a spatially modulated phototriggered linkage isomerism using a single-pulse two-beam interferometer. Our findings are discussed in the frame of pronounced photochromism and presence of refractive index changes accompanying the phototriggered isomerism. The latter is explained satisfactorily both by Kramers-Kronig-relation as well as Lorentz-Lorenz relation. Financial support by the DFG (GRK 695).