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  • Title: Wideband slow light in chirped slot photonic-crystal coupled waveguides.
    Author: Hou J, Wu H, Citrin DS, Mo W, Gao D, Zhou Z.
    Journal: Opt Express; 2010 May 10; 18(10):10567-80. PubMed ID: 20588909.
    Abstract:
    Wideband dispersion-free slow light in chirped-slot photonic-crystal coupled waveguides is proposed and theoretically investigated in detail. By systematically analyzing the dependence of band shape on various structure parameters, unique inflection points in the key photonic band with approximate zero group velocity can be obtained in an optimized slot photonic-crystal coupled waveguide. By simply chirping the widths of the photonic-crystal waveguides in the optimized structure, wideband (up to 20 nm) slow-light with optical confinement in the low dielectric slot is demonstrated numerically with relative temporal pulse-width spreading well below 8% as obtained from two-dimensional finite-difference time-domain simulations. The wideband slow-light operation of the proposed structures would offer significant potential for novel compact high-speed optical-signal-processing devices in silicon-based systems.
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