We investigate the propagation of a dark beam in a defocusing medium in the strong nonlinear regime. We observe for the first time a shock fan filled with noninteracting one-dimensional gray solitons that emanates from a gradient catastrophe developing around a null of the optical intensity. This scenario turns out to be very robust, persisting also when the material nonlocal response averages the nonlinearity over dimensions much larger than the emerging soliton filaments. © 2009 The American Physical Society.
Observation of a gradient catastrophe generating solitons / Conti, Claudio; Andrea, Fratalocchi; Marco, Peccianti; Ruocco, Giancarlo; Stefano, Trillo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 102:8(2009), p. 083902. [10.1103/physrevlett.102.083902]
Observation of a gradient catastrophe generating solitons
CONTI, CLAUDIO;RUOCCO, Giancarlo;
2009
Abstract
We investigate the propagation of a dark beam in a defocusing medium in the strong nonlinear regime. We observe for the first time a shock fan filled with noninteracting one-dimensional gray solitons that emanates from a gradient catastrophe developing around a null of the optical intensity. This scenario turns out to be very robust, persisting also when the material nonlocal response averages the nonlinearity over dimensions much larger than the emerging soliton filaments. © 2009 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
