2026-04-17T06:56:09Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1057892026-02-09T05:53:36Zcom_2072_1033col_2072_452950

Stabilization of multibeam necklace solitons in circular arrays with spatially modulated nonlinearity Kartashov, Yaroslav Malomed, B A Vysloukh, Victor A. Torner Sabata, Lluís Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica Photonics Optical communications Fotònica Comunicacions òptiques We consider necklace solitons supported by circular waveguide arrays with out-of-phase modulation of nonlinearity and linear refractive index. Such two-dimensional necklace solitons appear as rings of multiple out-of-phase bright spots. We show that necklace solitons are stable if their peak intensity is low or moderate and that the domain of stability shrinks with increasing nonlinearity modulation depth. However, we find that the stability domains expand with increasing number of necklace spots. Peer Reviewed Postprint (published version) 2009-11 Article https://journals.aps.org/pra/abstract/10.1103/PhysRevA.80.053816 Restricted access - publisher's policy