title: Tight-binding description of the coupled defect modes in three-dimensional photonic crystals
abstract: We have experimentally observed the eigenmode splitting due to coupling of the evanescent defect modes in three-dimensional photonic crystals. The splitting was well explained with a theory based on the classical wave analog of the tight-binding (TB) formalism in solid state physics. The experimental results were used to extract the TB parameters. A new type of waveguiding in a photonic crystal was demonstrated experimentally. A complete transmission was achieved throughout the entire waveguiding band. We have also obtained the dispersion relation for the waveguiding band of the coupled periodic defects from the transmission-phase measurements and from the TB calculations.
authors.affiliation: Department of Physics, Bilkent University, Bilkent, 06533 Ankara, Turkey.
authors.initials: M
authors.lastname: Bayindir
authors.initials: B
authors.lastname: Temelkuran
authors.initials: E
authors.lastname: Ozbay