Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 18: Materials Research in Polar Oxides: Perspectives for Optics & Electronics
KFM 18.7: Talk
Thursday, March 20, 2025, 17:30–17:45, H9
Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals — Laura Bollmers1,2, Tobias Babai-Hemati2, Boris Koppitz3, Christof Eigner1, Laura Padberg1,2, •Michael Rüsing1,2, Lukas M. Eng3,4, and Christine Silberhorn1,2 — 1Paderborn University, Institute for Photonic Quantum Systems (PhoQS), 33098 Paderborn, Germany — 2Paderborn University, Integrated Quantum Optics, 33098 Paderborn, Germany — 3Institut für Angewandte Physik, Technische Universität Dresden, 01062 Dresden, Germany — 4ct.qmat: Dresden-Würzburg Cluster of Excellence|EXC 2147, TU Dresden, 01062 Dresden, Germany
Lithium niobate tantalate mixed crystals present a novel material plattform, which offer new possibilities over pure lithium niobate or lithium tantalate, such as improved thermal stability or the possibility to tune the birefringence. A key requisite for application in nonlinear optics, electronics and piezotronic is the possibility of domain engineering. So far, this proved difficult for mixed crystals due to stoichiometric inhomogeneities, which stabilizes the random as-grown domain structure. In this work, we investigate surface-near periodic poling of x-cut mixed crystals and demonstrate microscopically how the random domain structure in the as-grown crystals can inhibit large scale poling. If monodomain areas are poled, however, periodic poling becomes possible. Our work lays the foundation for future applications of lithium niobate tantalate mixed crystals.
Keywords: lithium niobate; periodic poling; domain engineering; lithium tantalate; mixed crystal