title: Role of internal and continuum modes in modulational instability of quadratic solitons.
abstract: The role of internal and continuum modes in the modulational instability of spatial quadratic solitons is examined by asymptotic and numerical analyses. It is shown that these modes generate novel spatially symmetric and asymmetric modulation instability branches, which underline soliton dynamics throughout a wide region of the wave-vector mismatch.
authors.affiliation: Department of Physics and Applied Physics, University of Strathclyde, Glasgow G4 0NG, Scotland.
authors.forename: D V
authors.initials: DV
authors.lastname: Skryabin