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Platicon dynamics in photonic molecules
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology. Chalmers University of Technology, Sweden.ORCID iD: 0000-0001-8269-1033
Universidad Politécnica de Madrid, Spain.
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
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2023 (English)In: Communications Physics, E-ISSN 2399-3650, Vol. 6, no 1, article id 303Article in journal (Refereed) Published
Abstract [en]

Coherent dissipative structures known as platicons can be reliably generated in photonic molecules, resulting in deterministic and reproducible microcombs derived from a continuous-wave pump. However, the supermode spectrum of standard photonic molecules displays numerous avoided mode crossings, distorting the spectral envelope of platicon microcombs. Here, we obtain a platicon microcomb using a photonic molecule configuration based on two coupled microcavities, whose size differs by an order of magnitude. This results in an engineered microcomb spectrum that closely resembles the one generated in an ideal single microresonator with just one frequency mode shift. We observe the coupling between the repetition rate of the platicon microcomb with the frequency of the pump laser, an effect originating from the dispersive-wave recoil induced by mode crossings. Using two identical platicon microcombs, we make use of such coupling to realize dual-comb interferometry. These results contribute to understanding dissipative structures in normal-dispersion microresonators and offer an alternative to applications such as spectroscopy and metrology. 

Place, publisher, year, edition, pages
Nature Research , 2023. Vol. 6, no 1, article id 303
Keywords [en]
Dispersion (waves); Molecules; Pumping (laser); Continuous wave pump; Deterministics; Dissipative structure; Micro resonators; Microcombs; Molecule configurations; Photonic molecules; Spectra’s; Spectral envelopes; Supermodes; Microresonators
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:ri:diva-67662DOI: 10.1038/s42005-023-01424-5Scopus ID: 2-s2.0-85174435356OAI: oai:DiVA.org:ri-67662DiVA, id: diva2:1815488
Note

This work was supported by the European Research Council (GA 771410 DarkComb); Vetenskapsrådet (VR-2020-00453); Stiftelsen för Strategisk Forskning (FID16-0011). C.Q.G. acknowledges support from “Programa Propio UPM” of Universidad Politécnica de Madrid and from grants TED2021-131957B-100 and PID2021-1234590B-C21 funded by MCIN/AEI/10.13039/ 501100011033 and by the European Union NextGeneration EU/PRTR and ERDF “A way of making Europe”. The SiN devices were fabricated at Myfab Chalmers. 3 4

Available from: 2023-11-29 Created: 2023-11-29 Last updated: 2023-11-29Bibliographically approved

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Rebolledo-Salgado, IsraelZelan, Martin

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