title: Introduction.
abstract: Photonic crystal materials attracted much attention during last years with the number of publications and patents increasing exponentially. Two-dimensional (2D) photonic crystal structures, like holey fibers and 2D slab-type photonic crystals, are probably the most advanced and fast developing areas owing to mature fabrication methods and envisioned broad applications. They are now at a critical phase of their development as they move fast from the realm of fundamental studies to photonic devices and commercialization. The idea behind this issue is to look at both fiber and 2D waveguide geometries and explore some of the most important and interesting issues related to implementation of these optical structures as photonic devices. This special issue is inspired by a recent LEOS Topical Meeting on this topic held in Vancouver in July 2003. The meeting was very stimulating and challenged many perceptions of the role of photonic crystal technologies in next generation photonic devices. We have invited a good mix of theoretical, experimental and optical device contributions, both from the photonic crystal community as well as the holey fiber community with the intention that this special issue will catalyze the rapid advance of our subject and bring together these different fields to foster research strength.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Eggleton
authors.forename: Yurii
authors.initials: Y
authors.lastname: Vlasov