Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.033901
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Funding
- CINECA-ISCRA
- Humboldt foundation
- European Research Council under the European Community [201766]
- Italian Ministry of Research (MIUR) through the Futuro in Ricerca FIRB [PHOCOS-RBFR08E7VA]
- SMARTCONFOCAL of the Regione Lazio
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The instabilities arising in a one-dimensional beam sustained by the diffusive photorefractive nonlinearity in out-of-equilibrium ferroelectrics are theoretically and numerically investigated. In the scale-free model, in striking contrast with the well-known spatial modulational instability, two different beam instabilities dominate: a defocusing and a fragmenting process. Both are independent of the beam power and are not associated with any specific periodic pattern.
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