title: Cutoff solitons in axially uniform systems.
abstract: The optical response of axially uniform nonlinear photonic bandgap fibers is studied theoretically. We observe gap-soliton-like generation and associated bistability, similar to what is typically found in periodically modulated nonlinear structures. This response stems from the nature of the guided-mode dispersion relations, which involve a frequency cutoff at zero wave vector. In such systems, solutions with zero group velocities and minimal coupling to radiation modes come in naturally. We term such solitons "cutoff solitons"; they provide an interesting alternative to gap solitons in periodically index-modulated fibers for in-fiber all-optical signal processing.
authors.affiliation: Center for Materials Science and Engineering, Massachusetts Institute for Technology, Cambridge, Massachusetts 02139, USA. lidoriki@mit.edu
authors.forename: Elefterios
authors.initials: E
authors.lastname: Lidorikis
authors.forename: Marin
authors.initials: M
authors.lastname: Soljacić
authors.forename: Mihai
authors.initials: M
authors.lastname: Ibanescu
authors.forename: Yoel
authors.initials: Y
authors.lastname: Fink
authors.forename: J D
authors.initials: JD
authors.lastname: Joannopoulos