Dresden 2017 – scientific programme

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KR: Fachgruppe Kristallographie

KR 1: Various Topics I (with DF)

KR 1.8: Talk

Monday, March 20, 2017, 12:10–12:30, GER 37

Confocal Raman analysis of diffusion profiles in ion exchanged waveguides in PPKTP — •Julian Brockmeier, Michael Rüsing, Christof Eigner, Laura Padberg, Gerhard Berth, Christine Silberhorn, and Artur Zrenner — Department Physik, Universität Paderborn, 33098 Paderborn, Germany

KTP presents a promising material system for integrated quantum optical applications. Integrated quantum optical devices require the fabrication of waveguides, which can be achieved in this material via the ion exchange of Potassium by Rubidium. An optimized fabrication of these structures requires a detailed understanding of the induced changes in the material structure, such as the diffusion profile. Here the confocal Raman imaging technique presents one of the foremost methods for a three dimensional spatial analysis of the material properties. Within this work periodically poled KTP (PPKTP) waveguides have been visualized by Raman imaging. For a more detailed analysis of the induced material changes the data processing has been improved and now allows to map the changes of the FWHM shift and intensity of peaks in the Raman spectra. Based on this optimized method, spectral features have been identified, which are sensitive to the concentration of the ion exchanged Rubidium.