Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 85: Organic-Inorganic Systems IV: Electronic Structure
O 85.10: Talk
Thursday, March 10, 2016, 17:30–17:45, S051
Photo Switching the Optical Nonlinear Response of a Fulgimide Functionalized Silicon Surface — •Marc Hänsel1, Christoph Barta2, Karola Rück-Braun2, and Petra Tegeder1 — 1Physikalisch-Chemisches Institut, Universität Heidelberg, Germany — 2Institut für Chemie, Technische Universität Berlin, Germany
Fulgimides are a group of molecules which undergo a ring closing and opening reaction under illumination with UV and visible light. They can retain their photochromic properties after binding to a silicon surface by a well-chosen linker molecule. Due to the large hyperpolarizability of the molecules the nonlinear optical (NLO) properties of the surface can be controlled by illumination with light. The samples were investigated with second harmonic generation (SHG), taking advantage of the symmetry of the substrate, which generates no SHG signal. We will show that a controlled photoinduced reversible change of the NLO properties of an indolylfulgimide functionalized silicon surface is possible.