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  1. No Access

    Article

    Light Guiding in Low Index Materials using High-Index-Contrast Waveguides

    We propose a novel high-index-contrast waveguide structure capable of light strong confinement and guiding in low-refractive-index materials. The principle of operation of this structure relies on the electric...

    Vilson R. Almeida, Qianfan Xu, Roberto R. Panepucci… in MRS Online Proceedings Library (2003)

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    Article

    Raman Gain in Silicon Using Highly Confined Waveguide Structure

    We show ultra-fast Raman gain dynamics in submicron-size silicon-on-insulator strip waveguide. Using high confinement structures and pico-second pump pulses, we show 6-dB net nonlinear gain with 20.7-W peak pu...

    Qianfan Xu, Vilson R. Almeida, Michal Lipson in MRS Online Proceedings Library (2004)

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    Article

    Changing the colour of light in a silicon resonator

    As the demand for high bandwidths in microelectronic systems increases, optical interconnect architectures are now being considered that involve schemes commonly used in telecommunications, such as wavelength-...

    Stefan F. Preble, Qianfan Xu, Michal Lipson in Nature Photonics (2007)