title: Optically induced photovoltaic self-defocusing-to-self-focusing transition.
abstract: We show theoretically and experimentally that the photovoltaic nonlinearity that gives rise to spatial solitons can be switched from self-defocusing to self-focusing (or vice versa) by use of background illumination. This raises the possibility of bright photovoltaic solitons in LiNbO(3) .
authors: C
authors: C
authors: Anastassiou
authors: M F
authors: MF
authors: Shih
authors: M
authors: M
authors: Mitchell
authors: Z
authors: Z
authors: Chen
authors: M
authors: M
authors: Segev