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Authors: W. Bogaerts, P. Bienstman, R. Baets
Title: Scattering at sidewall roughness in photonic crystal slabs
Format: International Journal
Publication date: 4/2003
Journal/Conference/Book: Optics Letters
Editor/Publisher: OSA, 
Volume(Issue): 28(9) p.689-691
DOI: 10.1364/OL.28.000689
Citations: 60 ( - last update: 16/6/2024)
38 (OpenCitations - last update: 3/5/2024)
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We have simulated the effect of sidewall roughness in photonic-crystal-like structures for varying vertical refractive index contrast. We treat the scattering off a sidewall irregularity as a radiating dipole excited by the incident waveguide mode. We show that the loss due to this scattering is significantly larger for structures with a low refractive index contrast (like GaAs/AlGaAs waveguides) compared to structures with a high vertical index contrast (like Silicon-on-insulator or membranes).

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