Article
Dispersion Control in Two-Dimensional Superlattice Photonic Crystal Slab Waveguides by Atomic Layer Deposition
Applied Physics Letters
Document Type
Article
Publication Date
10-29-2007
Disciplines
Abstract
The frequency and dispersion of photonic bands in two-dimensional triangular-based superlattice photonic crystal Si slab waveguides were manipulated using atomic layer deposition. The samples were conformally coated with increasing thicknesses of TiO2 and characterized by polarized angular-dependent reflectance measurements, which revealed shifts in the photonic band frequencies of 16% as well as continuous changes in band dispersion. The ability to tune toward zero group velocity by tuning band repulsion between same-polarization bands is demonstrated. Finite-difference time-domain calculations, combined with a dielectric weighting model, were used to assess the observed band and dispersion tuning.
Citation Information
D. P. Gaillot, Elton Graugnard, J. Blair and C. J. Summers. "Dispersion Control in Two-Dimensional Superlattice Photonic Crystal Slab Waveguides by Atomic Layer Deposition" Applied Physics Letters (2007) Available at: http://works.bepress.com/elton_graugnard/50/