Paper 14092-73
Paper 14092-73
Arbitrary dispersion-engineered integrated gallium phosphide photonic crystal cavities for coherent dissipative structures generation
On demand | Presented live 14 April 2026 
Abstract
We demonstrate dissipative Kerr soliton (DKS) generation and near-zero-dispersion solitons in gallium phosphide (GaP) photonic-crystal Fabry–Perot (PC-FP) resonators driven by subharmonic optical pulses from an electro-optic frequency comb. The high refractive index and χ(3) nonlinearity of GaP enable broadband dispersion engineering with compact, high-Q cavities. Our devices, operating at 20 and 55 GHz free spectral ranges, support large-scale integration with over 200 resonators per chip. In the 55 GHz device, we observe subharmonic Kelly sidebands originating from strong dispersion and periodic soliton perturbation, consistent with simulations of a pulse-driven Lugiato–Lefever equation. Further dispersion broadening produces oscillatory integrated-dispersion profiles, giving rise to unconventional coherent structures. In 20 GHz resonators, we observe high-order near-zero-dispersion solitons with temporal oscillations and dispersive-wave emission induced by dispersion oscillations rather than zero-dispersion crossings.
Presenter
Alisa Davydova
Swiss Federal Institute of Technology Lausanne (EPFL) (Switzerland)
Alisa Davydova is a PhD student at the Laboratory of Photonics and Quantum Measurements at EPFL, Switzerland. She received her BSc in Physics, at Lomonosov Moscow State University, and her M. Sc. in Photonics and Quantum Materials, at Skolkovo Institute of Science and Technology. Her current research focuses on integrated frequency combs, dispersion engineering, and ultrafast pulse generation in high-Q photonic devices. She has authored 4 peer-reviewed publications and regularly presents at international conferences including European Conference on Integrated Optics (ECIO) and CLEO.
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