Job Description
In cooperation with the Chair of Laser Technology LLT, the Fraunhofer Institute for Laser Technology ILT, Europe's leading center for contract research and development in the field of laser technology, offers the opportunity to write a master's thesis on the topic: In-situ analysis of UKP laser structuring in sapphire.
Modern laser processes such as Selective Laser-induced Etching ( (SLE) are used to manufacture high-precision glass components for the semiconductor industry, medical technology, and quantum technology with detailed dimensions of < 1 µm. The strong focusing of ultrashort pulsed laser radiation achieves extremely high light intensities of 10^12 W/cm^2, which trigger nonlinear absorption mechanisms and thus enable the processing of transparent materials. Crystalline materials such as sapphire are particularly attractive for many applications due to their hardness and high thermal conductivity. However, the underlying absorption mechanisms of laser radiation in sapphire are still poorly understood. In a first step, a pump-probe system will be used to investigate the absorption mechanisms, the propagation of shock waves, and the formation of stresses and cracks in the femtosecond range.