Bachelor's Thesis: Stress Analysis of USP Laser Structuring in Sapphire

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—is offering the opportunity to write a thesis on the topic: Stress Analysis of USP Laser Structuring in Sapphire.

Modern laser processes such as selective laser etching (SLE) are used to fabricate high-precision glass components for the semiconductor industry, medical technology, and quantum technology, with feature dimensions of less than 1 µm. Crystalline materials such as sapphire are attractive for many applications due to their hardness and high thermal conductivity. However, due to its crystal structure, sapphire is particularly susceptible to stress and cracking. The mechanisms of stress and cracking formation, as well as their dependence on laser and process parameters, are still poorly understood. Comprehensive research into these relationships is, however, crucial for the reliable fabrication of increasingly complex sapphire components.

Be part of change

• You will undergo structured training on the topic of 'Processing transparent materials with USP laser radiation'.

• In addition, you will plan and independently conduct experiments on the SLE laser processing system.

• When using a microscope, you will measure stress distributions using the polarization contrast method.

• For evaluation, you will apply structured analytical methods and create clear presentations of your results.

• The fabrication of a sapphire demonstrator is also part of your responsibilities.

What you contribute

• You are studying mechanical engineering, physics, or a related field.

• You are interested in experimental laser technology, and eager to contribute to exciting and cutting-edge research as part of a dedicated team.

• You are motivated to familiarize yourself with a challenging subject area and to independently develop solutions to potential problems.

• In addition, you work independently and conscientiously.

What we offer

• Team spirit: Creative, interdisciplinary environment with a motivated team, flat hierarchies, and an informal culture.

• Workplace: Excellent range of machines and equipment, as well as first-class office facilities.

• Involvement: Practice-oriented thesis in an innovative applied research environment.

• Work-life balance: Benefit from flexible working hours based on trust.

• Getting there: Good transport connections, parking spaces directly in front of the institute, an e-charging station, and a parking garage.

The position is limited in duration until completion of the thesis. We value and promote the diversity of our employees' skills and therefore welcome all applications – regardless of age, gender, nationality, ethnic and social origin, religion, ideology, disability, sexual orientation and identity. Severely disabled persons are given preference in the event of equal suitability. Our tasks are diverse and adaptable – for applicants with disabilities, we work together to find solutions that best promote their abilities.

With its focus on developing key technologies that are vital for the future and enabling the commercial utilization of this work by business and industry, Fraunhofer plays a central role in the innovation process. As a pioneer and catalyst for groundbreaking developments and scientific excellence, Fraunhofer helps shape society now and in the future.

Ready for a change? Then apply now and make a difference! Once we have received your online application, you will receive an automatic confirmation of receipt. We will then get back to you as soon as possible and let you know what happens next.

If you have any questions about this position, please contact:

Christian Peters M. Sc. Phone: +49 241 8906-261

Fraunhofer Institute for Laser Technology ILT www.ilt.fraunhofer.de

Requisition Number: 84801 Application Deadline: 10/31/2026