Abstract

Fano resonance has important applications in high-sensitivity sensing, optical switching, and modulating. A tunable Fano resonance with a high extinction ratio (ER) and slope rate (SR) is in great demand. Here we demonstrate Fano resonance in a microring-resonator-coupled Mach–Zehnder interferometer that is fabricated in silicon-on-insulator. The SR and resonant wavelength of the Fano resonance can be electrically and independently tuned. In the experiment, the Fano resonance shows a maximal ER of 56.8 dB and a maximal SR of 3388.1 dB/nm. The SR and resonant wavelength also can be tuned from 870.06 to 3388.1 dB/nm, and 1558.73 to 1559.96 nm, respectively.

© 2019 Optical Society of America

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