aInstitute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142190, Russia
bInstitut Fresnel, Faculté des Sciences et Techniques de Saint Jérome, Case 262, 13397 Marseille Cedex, 20, France
Abstract:
We study nonlinear dynamics of optical pulse propagation in the spectral region inside the polariton gap. It is shown that the Kerr nonlinearity can lead to formation of solitary waves in this region of frequencies.