Scattering at sidewall roughness in photonic crystal slabs
- 1 May 2003
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 28 (9) , 689-691
- https://doi.org/10.1364/ol.28.000689
Abstract
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 waveguides) than for structures with a high vertical index contrast (such as silicon-on-insulators and membranes).
Keywords
This publication has 9 references indexed in Scilit:
- Structural tuning of guiding modes of line-defect waveguides of silicon-on-insulator photonic crystal slabsIEEE Journal of Quantum Electronics, 2002
- Out-of-plane scattering in 1-D photonic crystal slabsOptical and Quantum Electronics, 2002
- Quantitative measurement of low propagation losses at 155 μm on planar photonic crystal waveguidesOptics Letters, 2001
- Out-of-plane scattering in photonic crystal slabsIEEE Photonics Technology Letters, 2001
- Optical modelling of photonic crystals and VCSELs using eigenmode expansion and perfectly matched layersOptical and Quantum Electronics, 2001
- Three-dimensional control of light in a two-dimensional photonic crystal slabNature, 2000
- Radiation losses of waveguide-based two-dimensional photonic crystals: Positive role of the substrateApplied Physics Letters, 2000
- Angular dependence and polarization of out-of-plane optical scattering from particulate contamination, subsurface defects, and surface microroughnessApplied Optics, 1997
- Two-dimensional photonic-bandgap structures operating at near-infrared wavelengthsNature, 1996