Regensburg 2016 – scientific programme
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DF: Fachverband Dielektrische Festkörper
DF 11: Poster
DF 11.30: Poster
Wednesday, March 9, 2016, 18:00–20:00, Poster E
Impact of ion-implantation on the nonlinear susceptibility in LiNbO3: A basic study — •Kai Jürgen Spychala1, Lei Wang2, Michael Rüsing1, Gerhard Berth1, and A. Zrenner1 — 1Department Physik, Universität Paderborn, 33098 Paderborn, Germany — 2School of physics, Shandong University, 250100 Shandong, China
One of the key elements on the way to integrated optical structures (IOS) are high quality optical waveguides. However, the process of waveguide construction itself is accompanied by a violation of the crystal structure of the used material. Especially when the nonlinear optical properties play a major role in the IOS [1], the impact of ion implantation on the material becomes important. Within this work the effective nonlinear coefficient in ion implanted LiNbO3 waveguides has been studied via surface-near Second-Harmonic (SH) analysis. As in previous work of P. Günter et al. [2], the nonlinear analysis was carried out on wedge shaped samples to acquire depth information in backscattering geometry. Our experimental data shows that a characteristic SH-signal drop is produced for all samples in the implanted region. A comparison with simulation data calculated with the software package "SRIM" by Ziegler et al., suggests that the characteristic drop can be traced back to the induced defects and therefore fits into the simulation curves. In a further step we also examined annealed samples with the same method and obtained that the induced damage can be healed partially.
[1] Daniel Sjörberg: "Nonlinear waveguides" (2001)
[2] P.Günter: "Nonlinear optical effects and materials" (2000)