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.
Project backgroundThis 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.
Job description - 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.
Profile - 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
We offer - 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.
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