title: Nonparaxial dark solitons in optical Kerr media.
abstract: We show that the nonlinear equation that describes nonparaxial Kerr propagation, together with the already reported bright-soliton solutions, admits of (1 + 1)D dark-soliton solutions. Unlike their paraxial counterparts, dark solitons can be excited only if their asymptotic normalized intensity u2infinity is below 3/7; their width becomes constant when u2infinity approaches this value.
authors.affiliation: Istituto Nazionale per la Fisica della Materia, Unità di Ricerca Universitá dell'Aquila, 67010 L'Aquila, Italy, and Dipartimento di Fisica, Università dell'Aquila, 67010 L'Aquila, Italy. alessandro.ciattoni@aquila.infn.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Ciattoni
authors.forename: Bruno
authors.initials: B
authors.lastname: Crosignani
authors.forename: Shayan
authors.initials: S
authors.lastname: Mookherjea
authors.forename: Amnon
authors.initials: A
authors.lastname: Yariv