TY - JOUR
T1 - Modulational instability in a biexciton molecular chain with saturable nonlinearity effects
AU - Sali, Issa
AU - Tabi, C. B.
AU - Ekobena, H. P.
AU - Kofané, T. C.
PY - 2016/1/10
Y1 - 2016/1/10
N2 - 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.
AB - 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.
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U2 - 10.1142/S0217979215502446
DO - 10.1142/S0217979215502446
M3 - Article
AN - SCOPUS:84954396969
SN - 0217-9792
VL - 30
JO - International Journal of Modern Physics B
JF - International Journal of Modern Physics B
IS - 1
M1 - 1550244
ER -