Dresden 2017 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 9: Poster Session
DF 9.2: Poster
Dienstag, 21. März 2017, 14:00–16:00, P1C
Second-Harmonic analysis of ion-implanted LiNbO3: Effect of ion-implantation on the nonlinear susceptibility — •Kai J. Spychala1, Lei Wang2, Gerhard Berth1, and Artur Zrenner1 — 1Department Physik, Universität Paderborn, 33098 Paderborn, Germany — 2School of physics, Shandong University, 250100 Shandong, PR China
On the way to integrated LiNbO3 optics a key technology is the fabrication of high quality optical waveguides. The formation of waveguides is accompanied by a severe modification of the crystal structure, which may substantially change the optical properties of the used material. Within this work, the effective nonlinear coefficients in ion-implanted LiNbO3 waveguides have been studied via surface-near Second-Harmonic (SH) analysis for single domains as well as for periodically poled structures. The studies have been performed on a set of samples with different implantation dose and energy. The analysis was carried out in backscattering geometry on wedged samples to acquire depth-resolved information. The 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 implantation-induced defects. In particular, it is possible to correlate the used ion-dose and energy to specific features of the modified optical properties. In a second step a thermally annealed sample series was examined with the same method, revealing that the induced damage can be healed partially.