Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 56: Organic-Inorganic Systems III: Electronic Structure (organized by O)

CPP 56.10: 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.