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Authors: J. Ctyroky, S. Helfert, R. Pregla, P. Bienstman, R. Baets, R. De Ridder, R. Stoffer, G. Klaasse, J. Petracek, P. Lalanne, J.-P. Hugonin, R.M. De La Rue
Title: Bragg waveguide grating as a 1D photonic band gap structure: COST 268 modelling task
Format: International Journal
Publication date: 6/2002
Journal/Conference/Book: Optical and Quantum Electronics
Editor/Publisher: Kluwer Academic Publishers, 
Volume(Issue): 34(5/6) p.455-470
Internal Reference: [N-151]
Download: Download this Publication (944KB) (944KB)

Abstract

Modal reflection, transmission and loss of deeply etched Bragg waveguide gratings were modelled by six European laboratories using independently developed two-dimensional (2D) numerical codes based on four different methods, with very good mutual agreement. It was found that (rather weak) material dispersion of the SiO2/Si3N4 system does not significantly affect the results. The existence of lossless Floquet-Bloch modes in deeply etched gratings was confirmed. Based on reliable numerical results, the physical origin of out-of-plane losses of 1D or 2D photonic band gap structures in slab waveguides is briefly discussed.

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