We demonstrate electro-optical tunable time delay and advance in a silicon-microring-resonator-based notch filter integrated with a lateral p-i-n diode. We tune the time delay and advance by controlling the coupling regimes from over- to under-coupling through carrier-injection-based free-carrier dispersion effect. We measure maximum time delay and advance of approximately $-95$ and ~96 ps near critical coupling, with bandwidths of ~3.5 and ~3 GHz, upon dc power consumption in the range of $1\mathrm{mW}$ . We model the transmission spectra and time delay/advance using the transfer-matrix method and analyze the time-intensity and time-bandwidth products, which show good agreement with our measurements.

© 2010 Optical Society of America

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