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Abstract
We report ring resonators on a silicon germanium on silicon platform operating in the mid-infrared wavelength range around 3.5–4.6 µm with quality factors reaching up to one million. Advances in fabrication technology enable us to demonstrate such high Q-factors, which put silicon germanium at the forefront of mid-infrared integrated photonic platforms. The achievement of high Q is attested by the observation of degeneracy lifting between clockwise (CW) and counter-clockwise (CCW) resonances, as well as optical bistability due to an efficient power buildup in the rings.
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Details
1 Ecole Centrale de Lyon, INSA Lyon, CNRS, Universite Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69130 Ecully, France; School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
2 Ecole Centrale de Lyon, INSA Lyon, CNRS, Universite Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69130 Ecully, France
3 Université Grenoble Alpes, CEA-Leti, 38054 Grenoble, France
4 School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
5 Institute for Photonics and Advanced Sensing & School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia