The propagation of light in 5 × 5 and 7 × 7 cubic lattices of evanescently coupled waveguides is investigated for the first time, to the authors' knowledge. The results reveal ideal discrete diffraction and demonstrate the excellent quality of the waveguide arrays, which were manufactured in fused silica by femtosecond-laser-induced refractive-index modifications.
© 2004 Optical Society of America
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.4000) Optical devices : Microstructure fabrication
(230.7370) Optical devices : Waveguides
Thomas Pertsch, Ulf Peschel, Falk Lederer, Jonas Burghoff, Matthias Will, Stefan Nolte, and Andreas Tünnermann, "Discrete diffraction in two-dimensional arrays of coupled waveguides in silica," Opt. Lett. 29, 468-470 (2004)