PhD Position in Extreme-Precision Radial Velocity Instrumentation for Earth-like Exoplanets (HARVY Project) ETH Zürich in Switzerland

The HARVY Project at ETH Zürich offers a fully funded PhD position focused on extreme-precision radial velocity (EPRV) instrumentation for the detection of Earth-like exoplanets. EPRV spectrographs are currently the only mature and demonstrated methods capable of identifying Earth analogues around nearby stars without relying on transit geometry. However, stellar variability presents a significant challenge, producing signals much larger than those induced by small, temperate rocky planets. The HARVY project builds on the Terra Hunting Experiment, aiming to deliver a new reference design for an EPRV spectrograph that is both economical and scalable, suitable for deployment across a global network of telescopes.

The successful PhD candidate will play a central role in advancing the optical design of the HARVY spectrograph. Responsibilities include evaluating, characterising, and optimising novel optical components, leading the design and manufacturing of key subsystems, and contributing to the preparation and execution of an on-sky test campaign planned for 2028. The project is situated at the intersection of astrophysics, optical design, and astronomical instrumentation, providing a world-class research environment at ETH Zürich. The work directly supports the long-term goal of detecting true Earth analogues and establishing robust target lists for future exoplanet characterisation missions, such as NASA's Habitable Worlds Observatory and ESA's LIFE mission.

During the PhD, the student will develop expertise in EPRV instrumentation, optical design and tolerance analysis, throughput optimisation, system-level performance modelling, characterisation and testing of optical components, instrumental stability analysis, mitigation of systematic effects, laboratory validation, integration, and on-sky commissioning. Additional skills include scientific writing, proposal preparation, and international collaboration.

The position is expected to start in September 2026, with an initial appointment for four years, subject to satisfactory progress. The PhD is fully funded, with competitive salary and social benefits provided according to ETH Zürich and Swiss federal regulations. ETH Zürich offers an interdisciplinary and international research environment, values diversity and sustainability, and promotes equality of opportunity.

Applicants must hold a master's degree in physics, astrophysics, optics, or a closely related field. Strong interest in astronomical instrumentation and exoplanet science is required, along with experience or demonstrated interest in optical design, spectroscopy, or precision measurements. Programming and data analysis skills (e.g. Python, MATLAB, Zemax) are expected. Candidates should be able to work independently and as part of an international team, and must be fluent in English.

To apply, submit a single PDF file containing a cover letter, CV, academic transcripts, a brief statement of research interests, and contact details of two referees via the ETH Zürich online application portal by April 15, 2026. Applications via email or postal services will not be considered. For questions, contact Dr. Clark Baker at [email protected]. Further information is available on the group website and the ETH Physics Department and Institute for Particle Physics and Astrophysics websites.

ETH Zürich is renowned for its excellent education, cutting-edge research, and commitment to sustainability and diversity. Over 30,000 people from more than 120 countries contribute to a vibrant academic community dedicated to solving global challenges.