Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 48: Posters - Bioimaging and Spectroscopy

BP 48.20: Poster

Mittwoch, 9. März 2016, 17:00–19:00, Poster C

Nonlinear optical properties and photochemical polymerization of monomer crystals — •Oktay Aktas¹, Max Jonathan Kory², Carsten Becher¹, Arnulf Dieter Schlüter², and Manfred Fiebig¹ — ¹The Laboratory for Multifunctional Ferroic Materials, Department of Materials, ETH Zurich, Switzerland — ²Polymer Chemistry, Department of Materials, ETH Zurich, Switzerland

Organic materials have been used in a variety of applications for a century. With the advances in their synthesis, their potential applications are also rapidly increasing. In recent years there has been a growing interest in organic crystals for applications in electronics and photonics since some of them exhibit large optical nonlinearities. To possibly find such functional optical properties, we performed second harmonic generation spectroscopy on a polar and chiral monomer crystal, which can be polymerized by a photochemical reaction and confined to two dimensions (2D polymer) [1]. Measurements performed with 10 ns pulses have revealed that the monomer is strongly nonlinear in a large spectral range. In addition, the light-induced polymerization of monomers leads to differences in SHG intensities. As the depolymerization of polymer crystals can be achieved through heating, the monomer and polymer represent two switchable states with different nonlinear optical properties, which may find applications in integrated optics. [1] Max J. Kory, Michael Wöle, Thomas Weber, Payam Payamyar, Stan W. van de Poll, Julia Dshemuchadse, Nils Trapp and A. Dieter Schlüter, Nat. Chem. 6, 779 (2014)