论文信息 - Scattering at sidewall roughness in photonic crystal slabs.

Scattering at sidewall roughness in photonic crystal slabs.

We have simulated the effect of sidewall roughness in photonic-crystallike structures with different vertical refractive-index contrast. We treated the scattering off a sidewall irregularity as a radiating dipole excited by the incident waveguide mode. We show that the loss that is due to this scattering is significantly larger for structures with a low refractive-index contrast (such as GaAs/AlGaAs waveguides) than for structures with a high vertical index contrast (such as silicon-on-insulators and membranes).

[1] Henri Benisty,et al. Radiation losses of waveguide-based two-dimensional photonic crystals: Positive role of the substrate , 2000 .

[2] Roel Baets,et al. Optical modelling of photonic crystals and VCSELs using eigenmode expansion and perfectly matched layers , 2001 .

[3] M. Notomi,et al. Structural tuning of guiding modes of line-defect waveguides of silicon-on-insulator photonic crystal slabs , 2002 .

[4] Wim Bogaerts,et al. Out-of-plane scattering in 1-D photonic crystal slabs , 2001, IEEE Photonics Technology Letters.

[5] J. R. Wendt,et al. Three-dimensional control of light in a two-dimensional photonic crystal slab , 2022 .

[6] T. Germer,et al. Angular dependence and polarization of out-of-plane optical scattering from particulate contamination, subsurface defects, and surface microroughness. , 1997, Applied optics.

[7] A. Talneau,et al. Quantitative measurement of low propagation losses at 1.55 mum on planar photonic crystal waveguides. , 2001, Optics letters.

[8] Thomas F. Krauss,et al. Two-dimensional photonic-bandgap structures operating at near-infrared wavelengths , 1996, Nature.