Greater than one billion Q factor for on-chip microresonators

High optical quality (Q) factors are critically important in optical microcavities, where performance in applications spanning nonlinear optics to cavity quantum electrodynamics is determined. Here, a record Q factor of over 1.1 billion is demonstrated for on-chip optical resonators. Using silica wh...

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Bibliographic Details
Published in:Optics letters 2020-09, Vol.45 (18), p.5129-5131
Main Authors: Wu, Lue, Wang, Heming, Yang, Qifan, Ji, Qing-xin, Shen, Boqiang, Bao, Chengying, Gao, Maodong, Vahala, Kerry
Format: Article
Language:English
Subjects:
Microcavities
Nonlinear optics
Optical resonators
Q factors
Quantum electrodynamics
Silicon dioxide
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Summary:High optical quality (Q) factors are critically important in optical microcavities, where performance in applications spanning nonlinear optics to cavity quantum electrodynamics is determined. Here, a record Q factor of over 1.1 billion is demonstrated for on-chip optical resonators. Using silica whispering-gallery resonators on silicon, Q-factor data is measured over wavelengths spanning the C/L bands (100 nm) and for a range of resonator sizes and mode families. A record low sub-milliwatt parametric oscillation threshold is also measured in 9 GHz free-spectral-range devices. The results show the potential for thermal silica on silicon as a resonator material.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.394940