The Leibniz Institute for Crystal Growth (IKZ) performs basic and applied research in the fields of growth, characterization and processing of crystalline matter. It is part of Forschungsverbund Berlin e. V. and a member of the Leibniz Association. The IKZ is a leading research institution in the area of crystal growth of technologically important materials for micro-, opto- and power electronics, sensors, optics and laser technology. This ranges from explorative fundamental research to pre-industrial development. IKZ invites applicants for a

PhD Position

available from January 1, 2018, on the topic: „Growth and laser characterization of Er3+-doped sesquioxide crystals“ Cubic rare-earth sesquioxides such as Lu₂O₃, Y₂O₃, and Sc₂O₃ are excellent host materials for lasers in the near and mid infrared spectral range. In particular when doped with Er3+ operated at the 3 µm transition, these materials allowed for higher efficiencies and output power than any other laser material. However, due to their high melting points the growth by crucible-based techniques is difficult and expensive. In this thesis, sesquioxide crystals shall be grown by the crucible-free optical floating zone technique (OFZ). The growth experiments will be carried out using a new growth facility acquired for this purpose. Moreover, the grown materials will be spectroscopically characterized with respect to their application as laser crystals in the new labs of the Center for Laser Materials at the IKZ. The most promising samples will be utilized for laser experiments in the wavelength range around 3 µm. Applicants must hold a Diploma or an MSc degree in physics, optical sciences, laser engineering or related studies. Practical experiences in the fields of crystal growth or laser engineering are desirable. The ability to work in a team and very good English skills are required, basic knowledge in German language is desirable. For scientific questions please contact Dr. Christian Kränkel, Tel.: +49 30 6392 3019, e-mail: christian.kraenkel@ikz-berlin.de