title: Bloch function approach for parametric gap solitons.
abstract: Using a Bloch function approach, we predict the existence of parametric gap solitary waves in a grating structure with quadratic nonlinearity. These waves consist of mutually trapped envelopes at the fundamental frequency and at the second harmonic, which are not sustained by any equivalent cubic nonlinearity.
authors.forename: C
authors.initials: C
authors.lastname: Conti
authors.forename: S
authors.initials: S
authors.lastname: Trillo
authors.forename: G
authors.initials: G
authors.lastname: Assanto