Robust Geometries for Second-Harmonic-Generation in Microrings Exhibiting a 4-Bar Symmetry
Year: 2020
Authors: Guillemy P., Vecchi C., Castellan C., Signorini S., Ghulinyan M., Bernard M., Parisi M., Pavesi L.
Autors Affiliation: Univ Trento, Dept Phys, Nanosci Lab, Via Sommar 14, I-38123 Povo, Trento, Italy; Fdn Bruno Kessler, Ctr Mat & Microsyst, Via Sommar 18, I-38123 Povo, Trento, Italy; CNR, Ist Nazl Ott, INO, Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy.
Abstract: Microring resonators made of materials with a zinc-blend or diamond lattice allowexploiting their 4-bar symmetry to achieve quasi-phase matching condition for second-order opticalnonlinearities. However, fabrication tolerances impose severe limits on the quasi-phase matchingcondition, which in turn degrades the generation efficiency. Here, we present a method to mitigatethese limitations. As an example, we studied the geometry and the pump wavelength conditions toinduce the second-harmonic generation in silicon-based microrings with a second-order susceptibility χ(2) ≠ 0. We found the best compromises between performances and experimental requirements,and we unveil a strategy to minimize the impacts of fabrication defects. The method can be easilytransferred to other material systems.
Journal/Review: APPLIED SCIENCES-BASEL
Volume: 10 (24) Pages from: 9047-1 to: 9047-12
More Information: This work is supported by the NEMO project (PRIN 2015KEZNYM).KeyWords: microrings; second harmonic generation; optical frequency combsDOI: 10.3390/app10249047ImpactFactor: 2.679Citations: 21data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-13References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click here