Regensburg 2004 – wissenschaftliches Programm
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DF: Dielektrische Festkörper
DF 2: Elektrische und optische Eigenschaften II
DF 2.5: Vortrag
Montag, 8. März 2004, 16:10–16:30, H11
Kinetics of holographic recording in optically bistabile systems — •Martin Fally1,2, Stephan Hausfeld1, Theo Woike1, Mirco Imlau1, Romano A Rupp2, and Mostafa Ellabban2 — 1Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany — 2Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Austria
Recently a new photorefractive effect was discovered in centrosymmetric crystals that could not be attributed to electrooptics. Subsequently the appealing properties of holographic scattering were revealed and since then the kinetics of diffraction and transmission have been a subject of study. Although the photosensitive properties of systems like sodium nitroprusside (Na2[Fe(CN)5NO]· 2H2O), garnets or even dye-doped polymers are of completely different origin, they astonishingly show similar behavior in their diffraction dynamics.
In this contribution we present a model that describes the nonlinear kinetics of grating formation during holographic recording in optically bistable systems. We compare the experimentally observed diffraction kinetics of various centrosymmetric crystals to the predictions of the model. The far-reaching consequences will be discussed and further experiments will be proposed.
M.F. is grateful for a Mercator-Gastprofessur funded by the DFG (OS 55/12-1). Financial support by the Austrian Science Fund FWF (P-15642) is acknowledged.