Modulational instability in a biexciton molecular chain with saturable nonlinearity effects

Issa Sali, C. B. Tabi, H. P. Ekobena, T. C. Kofané

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, we study the modulational instability (MI) in a biexciton molecular chain taking into account the saturable nonlinearity effects (SNE). Under the adiabatic approximation, the biexciton system is reduced to two coupled nonlinear Schrödinger equations. We perform the linear stability analysis of continuous wave solutions of the coupled system. This analysis reveals that the MI gain is deeply influenced by the SNE. Indeed, the gain spectrum decreases when increasing the saturable nonlinearity parameters. The numerical simulations reveal that the system exhibits incoherent periodic array of patterns and we also observe train of pulses due to the SNE.

Original languageEnglish
Article number1550244
JournalInternational Journal of Modern Physics B
Volume30
Issue number1
DOIs
Publication statusPublished - Jan 10 2016

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molecular chains
nonlinearity
nonlinear equations
continuous radiation
pulses
approximation
simulation

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Cite this

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abstract = "In this paper, we study the modulational instability (MI) in a biexciton molecular chain taking into account the saturable nonlinearity effects (SNE). Under the adiabatic approximation, the biexciton system is reduced to two coupled nonlinear Schr{\"o}dinger equations. We perform the linear stability analysis of continuous wave solutions of the coupled system. This analysis reveals that the MI gain is deeply influenced by the SNE. Indeed, the gain spectrum decreases when increasing the saturable nonlinearity parameters. The numerical simulations reveal that the system exhibits incoherent periodic array of patterns and we also observe train of pulses due to the SNE.",
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Modulational instability in a biexciton molecular chain with saturable nonlinearity effects. / Sali, Issa; Tabi, C. B.; Ekobena, H. P.; Kofané, T. C.

In: International Journal of Modern Physics B, Vol. 30, No. 1, 1550244, 10.01.2016.

Research output: Contribution to journalArticle

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T1 - Modulational instability in a biexciton molecular chain with saturable nonlinearity effects

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AU - Kofané, T. C.

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