Interplay of X(2) and X(3) effects for microcomb generation
Year: 2025
Authors: Talenti FR., Lovisolo L., Gerini A., Peng HF., Parra-Rivas P., Hansson T., Sun YF., Alonso-Ramos C., Morassi M., Lemaotre A., Harouri A., Koos C., Wabnitz S., Vivien L., Leo G.
Autors Affiliation: Univ Paris Saclay, Ctr Nanosci & Nanotechnol, CNRS, F-91120 Palaiseau, France; Univ Paris Cite, Lab Mat & Phenomenes Quant, F-75013 Paris, France; Karlsruhe Inst Technol, Inst Photon & Quantum Elect, D-76131 Karlsruhe, Germany; Univ Almeria, Dept Chem & Phys, Almeria 04120, Spain; Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden; Univ Libre Bruxelles, Serv OPERA Photon, B-1050 Brussels, Belgium; Sapienza Univ Rome, Dipartimento Ingn Elettron & Telecomunicaz, I-00184 Rome, Italy; CNR, INO, I-80078 Pozzuoli, Italy.
Abstract: While frequency comb generation in passive nonlinear optical cavities has been demonstrated in purely quadratic and Kerr platforms, the interplay between chi(2) and chi(3) effects is yet to be fully understood. In this work, we propose a doubly resonant AlGaAs microring design for second-harmonic Kerr-comb generation. We compute the full dispersion profile of the guided modes to describe the resulting dynamics. The doubly resonant condition implies the use of a double envelope mean-field model, and the confined field owns spectral components around both the pump and second harmonic wavelengths. The fabrication of such devices is discussed, and preliminary experimental results are presented. Due to its record nonlinear performance, we address AlGaAs as a promising platform for the generation of such novel microcomb sources.
Journal/Review: JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
Volume: 21 (1) Pages from: 23-1 to: 23-12
More Information: The authors acknowledge Hamza Dely and Victor Turpaud (C2N, CNRS) for the fruitful discussions.KeyWords: Optical frequency combs; Second harmonic generation; Nonlinear optics; AlGaAsDOI: 10.1051/jeos/2025018
