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. © 2012 American Physical Society
Beam instabilities in the scale-free regime / V., Folli; DEL RE, Eugenio; Conti, Claudio. - In: PHYSICAL REVIEW LETTERS. - ISSN 1079-7114. - STAMPA. - 108:3(2012), p. 033901. [10.1103/physrevlett.108.033901]
Beam instabilities in the scale-free regime.
DEL RE, EUGENIO;CONTI, CLAUDIO
2012
Abstract
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. © 2012 American Physical SocietyI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
