PhD Position in Novel Frequency Combs and Coupled Cavity Physics ETH Zürich in Switzerland

This PhD position at ETH Zürich focuses on exploring novel regimes of frequency comb physics, specifically investigating the coherence in coupled frequency comb lasers. Frequency combs are laser sources that generate thousands of evenly spaced spectral lines, serving as ultra-precise rulers for measuring light. The group aims to realize these combs directly on chip, leveraging liquid-like light and synthetic frequency dimensions to achieve unprecedented stability and control.

The project has significant implications for optical communications, precision spectroscopy, and LIDAR, as compact combs can revolutionize these fields. The research will address the challenge of combining multiple comb sources into a single coherent system, overcoming fabrication-induced detuning of the repetition rate and carrier-envelope offset.

Key objectives include exploring mutual coherence between fast-gain ring lasers, creating platforms for coupled comb ladders, applying topological coupling concepts to connect detuned frequency ladders, and inducing phase locking across devices. The project will also study 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, potentially enabling arrays of mutually coherent combs.

The successful candidate will join a research environment at the intersection of fundamental physics and advanced photonics, with access to state-of-the-art cleanroom and laser laboratories at ETH Zürich. ETH Zürich is renowned for its commitment to diversity, sustainability, and excellence in science and technology. Applicants should have a strong background in physics (optics, condensed matter, or quantum electronics) and an interest in nonlinear and topological photonics, laser dynamics, or frequency metrology.

Previous experience with lasers or nanofabrication is helpful but not required. Applications must be submitted online, including a cover letter, CV, academic transcripts, three reference contacts, and a publication or thesis sample.

For questions about the position, contact Mr Alexander Dikopoltsev at [email protected].