title: Photonic bandgap with an index step of one percent.
abstract: Early work suggested that very large refractive index contrasts would be needed to create photonic bandgaps in two or three dimensionally periodic photonic crystals. It was then shown that in two-dimensionally periodic structures (such as photonic crystal fibres) a non-zero wavevector component in the axial direction permits photonic bandgaps for much smaller index contrasts. Here we experimentally demonstrate a photonic bandgap fibre made from two glasses with a relative index step of only 1%.
authors.forename: A
authors.initials: A
authors.lastname: Argyros
authors.forename: T
authors.initials: T
authors.lastname: Birks
authors.forename: S
authors.initials: S
authors.lastname: Leon-Saval
authors.forename: C M
authors.initials: CM
authors.lastname: Cordeiro
authors.forename: F
authors.initials: F
authors.lastname: Luan
authors.forename: P St J
authors.initials: PS
authors.lastname: Russell