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Universal light-guiding geometry for on-chip resonators having extremely high Q-factor

Title
Universal light-guiding geometry for on-chip resonators having extremely high Q-factor
Author(s)
Kim, Dae-GonHan, SangyoonHwang, JoonhyukDo, In HwanJeong, DonginLim, Ji-HunLee, Yong-HoonChoi, MuhanLee, Yong-HeeChoi, Duk-YongLee, Hansuek
DGIST Authors
Kim, Dae-GonHan, SangyoonHwang, JoonhyukDo, In HwanJeong, DonginLim, Ji-HunLee, Yong-HoonChoi, MuhanLee, Yong-HeeChoi, Duk-YongLee, Hansuek
Issued Date
2020-11
Type
Article
Article Type
Article
Keywords
WAVE-GUIDESCHALCOGENIDE
ISSN
2041-1723
Abstract
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, The Author(s).
URI
http://hdl.handle.net/20.500.11750/12513
DOI
10.1038/s41467-020-19799-2
Publisher
Nature Research
Related Researcher
  • 한상윤 Han, Sangyoon
  • Research Interests Nanophotonic devices; photonic integrated circuits; optical neural networks; optical MEMS
Files in This Item:
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2-s2.0-85096440257.pdf

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Appears in Collections:
Department of Robotics and Mechatronics Engineering Intelligent Nanophotonics Lab 1. Journal Articles

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