title: Amorphous photonic lattices: band gaps, effective mass, and suppressed transport.
abstract: We study, experimentally and numerically, amorphous photonic lattices and the existence of band gaps therein. Our amorphous system comprises 2D waveguides distributed randomly according to a liquidlike model responsible for the absence of Bragg peaks, as opposed to ordered lattices with disorder which always exhibit Bragg peaks. In amorphous lattices the bands comprise localized states, but we find that defect states residing in the gap are more localized than the localization length of states within the band. Finally, we show how the concept of effective mass carries over to amorphous photonic lattices.
authors.affiliation: Physics Department and Solid State Institute, Technion, 32000 Haifa, Israel.
authors.forename: Mikael
authors.initials: M
authors.lastname: Rechtsman
authors.forename: Alexander
authors.initials: A
authors.lastname: Szameit
authors.forename: Felix
authors.initials: F
authors.lastname: Dreisow
authors.forename: Matthias
authors.initials: M
authors.lastname: Heinrich
authors.forename: Robert
authors.initials: R
authors.lastname: Keil
authors.forename: Stefan
authors.initials: S
authors.lastname: Nolte
authors.forename: Mordechai
authors.initials: M
authors.lastname: Segev