title: Electro-optical tunable time delay and advance in a silicon feedback-microring resonator.
abstract: We report the demonstration of electro-optical tunable time delay and advance using a silicon feedback-microring resonator integrated with p-i-n diodes. By controlling the feedback and round-trip phase shifts through the carrier-injection-based free-carrier dispersion effect, we obtain a large dynamic time tuning range (-88 ps to 110 ps) upon dc bias voltage change in the range of few tens of millivolts at a given resonance wavelength. We also demonstrate tunable time delay and advance at different resonance wavelengths within 0.76 nm wavelength range.
authors.affiliation: Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China.
authors.forename: Shaoqi
authors.initials: S
authors.lastname: Feng
authors.forename: Xianshu
authors.initials: X
authors.lastname: Luo
authors.forename: Shengwang
authors.initials: S
authors.lastname: Du
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Poon