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An ultracompact transverse magnetic (TM)-pass polarizer based on silicon nanophotonic waveguides is proposed, which contains two tapered waveguides sandwiching a narrow waveguide section only supporting TM-mode propagation. A full-vectorial eigenmode solver is employed to determine the appropriate cross section of the silicon nanophotonic waveguide. The device is first designed in a 2-D approximate...
Modal characterization of silicon nanophotonic waveguide and its coupling to an optical fiber are investigated, which include: 1) a full-vectorial modal analysis of silicon nanophotonic waveguide and a TM-pass nanophotonic polarizer based on a simple taper structure; 2) a superlens based coupling structure between nanophotonic waveguide and singlemode fiber with a designed coupling loss ~0.64 dB and...
Modal analysis of silicon photonic wire is presented based on the full-vectorial eigenmode solution. Numerical results indicate that for different height and width of silicon photonic wire, there are five regions corresponding to different modal characteristics, namely, multimode region, singlemode region, single TE polarization region, single TM polarization region and cutoff region. Simple expressions...
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