Modulational instability and solitary waves in one-dimensional lattices with intensity-resonant nonlinearity
Publication date
2008-10
Document type
Research article
Author
Organisational unit
Technische Universität Clausthal
Scopus ID
Series or journal
Physical review. A, Atomic, molecular, and optical physics The American Physical Society.
Periodical volume
78
Periodical issue
4
Part of the university bibliography
Nein
Abstract
We study theoretically light beam propagation in one-dimensional periodic media with intensity-resonant nonlinearity. The phenomenon of discrete modulational instability is investigated in detail as well as the conditions for the existence and stability of fundamental lattice and surface soliton modes. According to the linear stability analysis, only on-site solitons are stable. The mobility of lattice solitons is analyzed by both free energy and mapping concepts. Only broad solitons may freely traverse the lattice. © 2008 The American Physical Society.
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