Dresden 2014 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 2: Optical and nonlinear optical properties, photonic
DF 2.7: Vortrag
Montag, 31. März 2014, 12:30–12:50, GER 37
Visualization of domain gratings in potassium titanyl phosphate by nonlinear microscopy — •Moritz Grothe1, Christopher Buchholz1, Gerhard Berth1,2, and Artur Zrenner1,2 — 1Department Physik, Universität Paderborn, 33098 Paderborn, Germany — 2Center for Optoelectronics and Photonics Paderborn (CeOPP), 33098 Paderborn, Germany
The nonlinear microscopy combines the high spatial resolution of a confocal operating microscope with the additional information of polarization-dependent second harmonic generation allowing structure-adjusted characterization of the ferroelectric domain structure. In our study we address the nonlinear signatures of specific ferroelectric domain structures in potassium titanyl phosphate (KTP). Here the nonlinear response exhibit specific signatures, which are linked to the domain structure. A direct correlation with the nonlinear susceptibility tensor can be expected. A detailed nonlinear analysis of the transition area of contrarily poled domains reveals specific signal sequences subject to the polarity. Furthermore a functional dependence on depth of such se-quences was observed. Here an influence of surface charge and inner electric field distribution can be assumed.