We investigate spatial localization in a quadratic nonlinear medium in the presence of randomness. By means of numerical simulations and theoretical analyses we show that, in the down conversion regime, the transverse random modulation of the nonlinear susceptibility generates localizations of the fundamental wave that grow exponentially in propagation. The localization length is optically controlled by the pump intensity that determines the amplification rate. The results also apply to cubic nonlinearities. (C) 2013 Optical Society of America
Purely nonlinear disorder-induced localizations and their parametric amplification / Viola, Folli; Katia, Gallo; Conti, Claudio. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 38:24(2013), pp. 5276-5279. [10.1364/ol.38.005276]
Purely nonlinear disorder-induced localizations and their parametric amplification
CONTI, CLAUDIO
2013
Abstract
We investigate spatial localization in a quadratic nonlinear medium in the presence of randomness. By means of numerical simulations and theoretical analyses we show that, in the down conversion regime, the transverse random modulation of the nonlinear susceptibility generates localizations of the fundamental wave that grow exponentially in propagation. The localization length is optically controlled by the pump intensity that determines the amplification rate. The results also apply to cubic nonlinearities. (C) 2013 Optical Society of AmericaI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.