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Ultra-high Q (>5 times 105) microdisk resonators are demonstrated in a SiNx platform at 650 nm with integrated in-plane coupling waveguides on a Si substrate. Critical coupling to first-order radial-mode is demonstrated using pedestal layer to control coupling.
We propose two-dimensional nonblocking low-power photonic switch nodes for networks-on-chip using multimode-interference-based waveguide crossing-coupled microring electro-optic switch array in silicon-on-insulator.
We demonstrate on-chip absorption spectroscopy using silicon microring resonators with integrated microfluidic channels. Using a 40 mum radius resonator with Q>15,000 we show absorption spectra of less than 90 nL volumes of water and methanol from 1460 nm-1560 nm.
We show cascaded silicon microring resonators with 1.5-mum radius critically coupled to a narrower waveguide. A coupled Q of 9,000 is achieved. Devices are fabricated with the widely-available SEM-based lithography system using a stitching-free design.
We demonstrate ultra fast tuning of the optical quality factor of a resonator on a silicon chip using electro-optic tuning. We tune the cavity quality factor from 20,000 to 6,000 in 100 ps.
We report the first observation of Anderson light localization in compact silicon nanophotonic slow-light waveguides consisting of long sequences of coupled resonators fabricated on a silicon-on-insulator (SOI) chip.
Device induced data timing skew in optical interconnects is investigated. Up to 28 ps timing skew is induced by ring-resonator cavity Q variation in 10 Gb/s NRZ on-chip scenario, which may lead to 6 dB signal eye opening penalty.
Silicon-on-insulator (SOI) finite-size CROWs with optimized flat-band spectrum, excellent group-delay response, and compact size are experimentally demonstrated using direct correspondence with ladder-type LC circuits. Sensitivity analysis attributes residual distortions to non-ideal fabrication rather than coupling-induced-frequency-shifts.
We propose and demonstrate a new type of electro-optic microresonators, where the shape of the transmission spectrum is controlled by losses and phase shifts induced at the asymmetric coupler between the cavity and the bus waveguide.
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