title: Cross-phase-modulation nonlinearities and holographic solitons in periodically poled photovoltaic photorefractives.
abstract: We show that the nonlinearity in periodically poled photovoltaic photorefractives can be solely of the cross-phase-modulation type. The effects of self-phase modulation and asymmetric energy exchange, which exist in homogeneously poled photovoltaic photorefractives, can be considerably suppressed by the periodic poling. Finally, we demonstrate numerically that periodically poled photovoltaic photorefractives can support Thirring-type ("holographic") solitons, which to our knowledge have never been observed.
authors.affiliation: JILA and Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440, USA. coheno@colorado.edu
authors.forename: Oren
authors.initials: O
authors.lastname: Cohen
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Murnane
authors.forename: Henry C
authors.initials: HC
authors.lastname: Kapteyn
authors.forename: Mordechai
authors.initials: M
authors.lastname: Segev