Tunable Q-factor silicon microring resonators for ultra-low power parametric processes Article Swipe

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Resonator Materials science Coupling coefficient of resonators Q factor Optoelectronics Optics Silicon Fabrication Coupling (piping) Four-wave mixing Optical ring resonators Silicon photonics Nonlinear optics Laser Physics Metallurgy Medicine Pathology Alternative medicine

Michael J. Strain , Cosimo Lacava , Laura Meriggi , Ilaria Cristiani , Marc Sorel ·

YOU? · · 2015 · Open Access · · DOI: https://doi.org/10.1364/ol.40.001274 · OA: W2105824949

A compact silicon ring resonator is demonstrated that allows simple electrical tuning of the ring coupling coefficient and Q-factor and therefore the resonant enhancement of on-chip nonlinear optical processes. Fabrication-induced variation in designed coupling fraction, crucial in the resonator performance, can be overcome using this post-fabrication trimming technique. Tuning of the microring resonator across the critical coupling point is demonstrated, exhibiting a Q-factor tunable between 9000 and 96,000. Consequently, resonantly enhanced four-wave mixing shows tunable efficiency between -40 and -16.3 dB at an ultra-low on-chip pump power of 0.7 mW.