Description

Optical frequency combs are transformative light sources that have profoundly reshaped precision measurement science, as illustrated by the Nobel Prize in Physics awarded to Theodor W. Hänsch in 2005. Their applications span pollutant detection, distance measurement for autonomous vehicles, and the detection of exoplanets. Among the various platforms capable of generating frequency combs, high-quality-factor resonators offer decisive advantages for producing broadband and stable combs.

Despite extensive research efforts, the fundamental dynamics governing the formation of these combs remain only partially understood. A deeper understanding is essential to improve control over comb characteristics for the aforementioned applications. In particular, resonators capable of generating multiple frequency combs require specific investigation. These systems are of central interest for dual-comb spectroscopy, optical ranging, and neuromorphic computing, but their intrinsically multidimensional nonlinear dynamics introduce a level of complexity that remains unresolved.

Skills required

The ideal candidate should hold a Master’s degree or equivalent in physics, optics, engineering sciences, or applied mathematics, with strong knowledge in nonlinear optics and laser physics. A solid command of numerical and simulation methods is essential, in particular the solution of partial differential equations, spectral analysis, and scientific computing techniques. Proficiency in programming (MATLAB, Python, or equivalent) is required for developing and implementing numerical models. Experience in data analysis, scientific visualization, and signal processing will be considered an asset. The candidate should demonstrate autonomy, scientific rigor, and teamwork skills. Strong abilities in scientific writing in English and presentation of results are also expected to disseminate the work through publications and international conferences.

Bibliography

1. Y. Sun, J. Wu, M. Tan, X. Xu, Y. Li, R. Morandotti, A. Mitchell, and D. J. Moss, 'Applications of optical microcombs,' Adv. Opt. Photonics 15, 86 (2023).
2. J. Musgrave, S.-W. Huang, and M. Nie, 'Microcombs in fiber Fabry–Pérot cavities,' APL Photonics 8, (2023).

Keywords

frequency combs, resonators, solitons, modulation instability