Stability of dark screening solitons in photorefractive media

• Type: Article in International Scientific Journal
• Date: 2009

Authors

M. Facão (Author) Other; M. I. Carvalho (Author) FEUP

Journal

Title: Theoretical and Mathematical Physics

Vol. 160 No. 1

Pages: 917-924

ISSN: 0040-5779

Publisher: Pleiades Publishing

Indexing

ISI Web of Knowledge - 5 Citations

INSPEC

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-003-J3C

Abstract (EN): Biased photorefractive media are known to admit bright and dark solitons. The bright solitons in these media are always stable, but their dark counterparts are unstable above a certain background intensity and below a critical velocity. We use the stability criterion and the Vakhitov-Kolokolov function to precisely determine the unstable-parameter region. We also predict the strength of the instability by determining the unstable eigenvalues and eigenmodes using the Evans function method. Numerical simulation of the full evolution equation confirms the results.

Language: English

Type (Professor's evaluation): Scientific