Our group explores new regimes of frequency comb physics — laser sources that generate thousands of evenly spaced spectral lines, acting as ultra-precise rulers for measuring light. Unlike conventional combs that require large and complex setups, we aim to realize them directly on chip, using liquid-like light and schemes of lattices in synthetic frequency dimensions to achieve unprecedented stability and control. Such compact combs have wide-ranging applications in optical communications, precision spectroscopy, and LIDAR.

This project investigates the fundamental physics of coherence in coupled frequency comb lasers. A major open challenge is how to combine multiple comb sources into a single coherent system, overcoming fabrication-induced detuning of the repetition rate and carrier-envelope offset.

• Exploring the physics of mutual coherence between two fast-gain ring lasers, creating the first platform for coupled comb ladders
• Applying topological coupling concepts to connect detuned frequency ladders and induce phase locking across devices
• Studying the interplay of nonlinear dynamics, symmetry, and disorder in coupled comb arrays

The first milestone is to demonstrate phase-coherent coupling between two controllable mid-infrared comb lasers — a breakthrough that would open the door to arrays of mutually coherent combs.

• Strong background in physics (optics, condensed matter, or quantum electronics)
• Interest in nonlinear and topological photonics, laser dynamics, or frequency metrology
• Previous experience with lasers or nanofabrication is helpful, but not required

• A research environment at the intersection of fundamental physics and advanced photonics.
• State-of-the-art cleanroom and laser laboratories at ETH Zürich.
• The opportunity to uncover new regimes of coherence and coupling in chip-scale frequency combs.

In line with our values, ETH Zurich encourages an inclusive culture. We promote equality of opportunity, value diversity and nurture a working and learning environment in which the rights and dignity of all our staff and students are respected. Visit our Equal Opportunities and Diversity website to find out how we ensure a fair and open environment that allows everyone to grow and flourish.

We look forward to receiving your online application with the following documents in a single merged PDF document, titled with your last name and initials as well as the application date (for example, 20251010_DoeJane_application) in the following order:

• Cover letter detailing your research motivation, interests, and experience
• Curriculum Vitae (CV)
• Academic transcripts of all degrees in English (Bachelor’s and Master’s)
• Three professional reference contacts, including an email and a direct phone number to reach them
• A publication or thesis work sampling your academic reasoning and writing

Please note that we exclusively accept applications submitted through our online application portal. Applications via email or postal services will not be considered.

Further information about the Physics departement can be found on our website. Questions regarding the position should be directed to Mr Alexander Dikopoltsev, [email protected] (no applications).

We would like to point out that the pre-selection is carried out by the responsible recruiters and not by artificial intelligence.

ETH Zurich is one of the world’s leading universities specialising in
science and technology. We are renowned for our excellent education,
cutting-edge fundamental research and direct transfer of new knowledge
into society. Over 30,000 people from more than 120 countries find our
university to be a place that promotes independent thinking and an
environment that inspires excellence. Located in the heart of Europe,
yet forging connections all over the world, we work together to
develop solutions for the global challenges of today and tomorrow.