biostudies-literatureKim DGSamsung5933https://www.ebi.ac.uk/biostudies/studies/S-EPMC7683556biostudies-literatureUnknown11(1)By providing an effective way to leverage nonlinear phenomena in integrated devices, high-Q optical resonators have led to recent advances in on-chip photonics. However, developing fabrication processes to shape any new material into a resonator with extremely smooth surfaces on a chip has been an exceptionally challenging task. Here, we describe a universal method to implement ultra-high-Q resonators with any new material having desirable properties that can be deposited by physical vapor deposition. Using this method light-guiding cores with surface roughness on the molecular-scale are created automatically on pre-patterned substrates. Its efficacy has been verified using As₂S₃, a chalcogenide glass that has high-nonlinearity. The Q-factor of the As₂S₃ resonator so-developed approached the propagation loss record achieved in chalcogenide fibers which were limited by material losses. Owing to the boosted Q-factor, lasing by stimulated Brillouin scattering has been demonstrated with 100 times lower threshold power than the previous record.Nature communicationsUniversal light-guiding geometry for on-chip resonators having extremely high Q-factor.PMC7683556SRFC-IT1801-03Kim DGChoi DYLim JHDo IHJeong DLee HHan SLee YHHwang JChoi MfalseUniversal light-guiding geometry for on-chip resonators having extremely high Q-factor.By providing an effective way to leverage nonlinear phenomena in integrated devices, high-Q optical resonators have led to recent advances in on-chip photonics. However, developing fabrication processes to shape any new material into a resonator with extremely smooth surfaces on a chip has been an exceptionally challenging task. Here, we describe a universal method to implement ultra-high-Q resonators with any new material having desirable properties that can be deposited by physical vapor deposition. Using this method light-guiding cores with surface roughness on the molecular-scale are created automatically on pre-patterned substrates. Its efficacy has been verified using As₂S₃, a chalcogenide glass that has high-nonlinearity. The Q-factor of the As₂S₃ resonator so-developed approached the propagation loss record achieved in chalcogenide fibers which were limited by material losses. Owing to the boosted Q-factor, lasing by stimulated Brillouin scattering has been demonstrated with 100 times lower threshold power than the previous record.2020-01-01T00:00:00Z2020 Nov2024-11-14T17:07:35.702Z2021-02-21T04:32:47ZS-EPMC76835563323020710.1038/s41467-020-19799-2