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Mapping the optical properties of slab-type two-dimensional photonic crystal waveguides

Eric Dulkeith·Sharee J. McNab·Yurii A. Vlasov
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Abstract

We report on systematic experimental mapping of the transmission properties of two-dimensional silicon-on-insulator photonic crystal waveguides for a broad range of hole radii, slab thicknesses and waveguide lengths for both TE and TM polarizations. Detailed analysis of numerous spectral features allows a direct comparison of experimental data with 3D plane wave and finite-difference time-domain calculations. We find, counter-intuitively, that the bandwidth for low-loss propagation completely vanishes for structural parameters where the photonic band gap is maximized. Our results demonstrate that, in order to maximize the bandwidth of low-loss waveguiding, the hole radius must be significantly reduced. While the photonic band gap considerably narrows, the bandwidth of low-loss propagation in PhC waveguides is increased up to 125nm with losses as low as 8$\pm$2dB/cm.

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Eric Dulkeith, Sharee J. McNab, Yurii A. Vlasov. 2005-04-19. Mapping the optical properties of slab-type two-dimensional photonic crystal waveguides. https://doi.org/10.1103/physrevb.72.115102

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