T02D-Postdoctoral Researcher; f​/m​/d Bonding Technologies

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The German Center for Astrophysics (DZA) is being established as a new large‑scale research center in Lusatia, Germany. Its mission is to strengthen astrophysics in Germany, foster scientific excellence, and make a lasting contribution to the structural transformation of the region. As an internationally oriented research institution with a strong focus on innovation, the DZA will create new opportunities for scientific leadership while shaping the future of one of Germany's most dynamic research landscapes.

The following position is to be filled at the earliest possible date, fixed‑term until 30 June 2029 (third‑party‑funded position in accordance with Section 2(2) of the German Academic Fixed‑Term Contract Act – WissZeitVG):

Bonding Technologies for Cryogenic Composite Silicon Mirrors (ET Low‑Frequency Interferometer)

(Remuneration up to German public service pay grade TVöD Bund E13, depending on personal qualifications)

The DZA is a partner in Joint Project D of the German Einstein Telescope (ET) preparatory programme, one of five thematic joint projects coordinated by the German ET research community to advance preparations for ET and build up German capacity for its realisation. Joint Project D focuses on technologies for the mirrors of the low‑frequency interferometer (ET‑LF), which require large silicon substrates with extremely low optical absorption and excellent mechanical properties, operated under cryogenic suspension and ultra‑high vacuum conditions.

Within Subproject D2, the DZA is developing large‑scale composite silicon substrates by bonding smaller silicon pieces into larger test masses. This position is funded through the BMFTR joint project “ET Verbund D – Mirror Technologies – Technologies for ET‑LF Mirrors” (Subproject 3, grant no. 05A26CA
1) and will focus on the bonding technologies work package (WP3).

YOUR RESPONSIBILITIES:

• Investigate the material properties of bonded silicon components
• Research, develop, test, and evaluate bonding processes for silicon optical components
• Contribute to the development of process chains for bonding, handling, polishing, coating, and qualification of mirror components
• Analyze and interpret experimental data
• Support the setup, operation, and further development of experimental laboratory and measurement environments in compliance with applicable safety, quality, and documentation standards
• Collaborate with national and international research partners and publish scientific results in peer‑reviewed journals and at international conferences
• Contribute to the supervision of Bachelor's and Master's students

YOUR PROFILE:

• Completed university degree and PhD in Physics, Materials and Surface Science, Engineering, or a related experimental field
• Experience in at least two of the following areas:

o Materials science: experimental MEMS research, semiconductor fabrication

o Materials science: etching and/or bonding of silicon, surface and interface physics

o Experimental optical or mechanical characterization methods

• Interest in research topics related to gravitational‑wave physics and optical precision measurement systems
• Experience in scientific research and publication
• Must be able and willing to conduct self‑driven scientific work individually and as part of a collaborative team

DESIRED

EXPERIENCE:

• Experience with MEMS experiments or semiconductor fabrication, especially the etching or bonding of silicon
• Optical characterization, or building and operating laser optic experiments
• Knowledge of numerical simulation or FE analysis tools (e.g., COMSOL, Python)
• Independent and structured working style, strong teamwork skills, and enthusiasm for working within an international…