title: Counterpropagating spatial Kerr soliton in reflection gratings.
abstract: We analytically predict the existence of both spatial bright and dark counterpropagating solitons in a reflection grating in the presence of the Kerr nonlinearity. The basic trapping mechanism consists of a twofold balance where diffraction is compensated by self-focusing and reflection is altered by the nonlinear-induced interferometric grating. We find that, whenever the spectral soliton profile lies within the grating stop band, bright and dark solitons exist only if the mutual phase of the counterpropagating solitons is pi or 0, respectively.
authors.affiliation: Consiglio Nazionale delle Ricerche, CASTI Regional Laboratory, Dipartamento di Fisica, Universitá dell'Aquila, L'Aquila, Italy. alessandro.ciattoni@aquila.infn.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Ciattoni
authors.forename: Carlo
authors.initials: C
authors.lastname: Rizza
authors.forename: Eugenio
authors.initials: E
authors.lastname: DelRe
authors.forename: Elia
authors.initials: E
authors.lastname: Palange