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  • Title: Low-loss strip-loaded slot waveguides in silicon-on-insulator.
    Author: Ding R, Baehr-Jones T, Kim WJ, Xiong X, Bojko R, Fedeli JM, Fournier M, Hochberg M.
    Journal: Opt Express; 2010 Nov 22; 18(24):25061-7. PubMed ID: 21164851.
    Abstract:
    Electro-optic polymer-clad silicon slot waveguides have recently been used to build a new class of modulators, that exhibit very high bandwidths and extremely low drive voltages. A key step towards making these devices practical will be lowering optical insertion losses. We report on the first measurements of low-loss waveguides that are geometrically suitable for high bandwidth slot waveguide modulators: a strip-loaded slot waveguide. Waveguide loss for undoped waveguides of 6.5 ± 0.2 dB/cm was achieved with 40 nm thick strip-loading, with the full silicon thickness around 220 nm and a slot size of 200 nm, for wavelengths near 1550 nm.
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