Max Planck Institute for the Science of Light, ErlangenVisit and contact
Del'Haye LabMicrophotonics Research Laboratory

We turn one colour of light into many, on a chip.

We study how light behaves when it circulates in microscopic ring resonators. Our chips are designed, fabricated and measured in our own cleanroom at the Max Planck Institute for the Science of Light in Erlangen.

See the researchTwo postdoc positions are open

News

All news
Postdoc positions availableMicrocomb SimulatorAbdullah wins poster award at Nonlinear Photonics Winter SchoolLaserhandling Course

What we work on

All research areas

Microcombs and solitons

How a single laser becomes many evenly spaced colours in a ring resonator, and what those combs are good for.

Quantum light on a chip

Photon pairs and nonclassical light from integrated microresonators.

Nonlinear and neuromorphic photonics

Optical switches, memories and logic gates from the Kerr effect in coupled and counter-propagating resonators.

Integrated platforms and fabrication

Low-loss silicon nitride and aluminium nitride chips, made in our own cleanroom.

Two postdoc positions are open

We are looking for experimentalists with a background in nonlinear or quantum optics. Send a CV and a short note about what you want to work on.

How to apply
  • Microcombs and optical clocks
  • Chip-based quantum light states
  • Neuromorphic computing with light
  • Nonlinear optics
  • Microfabrication in our cleanroom

Microcomb simulator

Change the dispersion, detuning and pump power, and watch the comb form in your browser. Built by the group and free to use.

Open the simulator
soliton steppulse train in the resonator
Group members in laser-tag vests posing together in a dark room
The group after a laser handling course, April 2026.

The group

We are physicists and engineers from many countries, working together on experiments, simulations and chip fabrication. PhD students, master's students and visitors join us through the Max Planck School of Photonics, FAU Erlangen-Nürnberg and international programmes.

Meet the group

Recent publications

Full list
  1. Simplified Aluminum Nitride Processing for Low-Loss Integrated Photonics and Nonlinear OpticsH. Yan, S. Zhang, A. Pal, A. Ghosh, A. Alabbadi, M. Kheyri, T. Bi, Y. Zhang, I. Harder, O. Lohse, F. Gannott, A. Gumann, E. Butzen, K. Ludwig, and P. Del’Hayenpj Nanophoton. 3, 13 (Mar 2026)arXiv:2506.22595 (June 2025)
  2. Fourth-harmonic UV light generation in integrated silicon nitride microresonatorsA. Ghosh, A. Pal, H. Yan, T. Bi, L. O. Trinchão, Q. Zhou, G. S. Wiederhecker, S. Zhang, and P. Del'HayearXiv:2603.03255 (Mar 2026)
  3. Symmetry-Broken Cavity Solitons and Collective Polarization Conformity in Fabry-Perot Kerr ResonatorsY. G. Sanvert, A. Alabbadi, L. Hill, Y. Xu, G. Xu, G. -L. Oppo, S. Coen, E. Lucas, P. Del'Haye, and J. FatomearXiv:2602.21946 (Feb 2026)
  4. Exceptional points preceding and enabling spontaneous symmetry breakingL. Hill, J. T. Gohsrich, A. Ghosh, J. Fauman, P. Del'Haye, and F. K. KunstCommun. Phys. 9, 58 (Jan 2026)arXiv:2505.02691