Optical soliton in a dielectric medium due to rotational torque on the dipoles of the medium

摘要

We study the propagation of electromagnetic waves (EMW) in a dielectric fiber by considering a different type of nonlinearity in the material other than the usual Kerr effect. The nonlinearity is the torque produced due to the rotation of the dipoles in the material by means of an external electric field. We find that the electric field component of the propagating EMW satisfies the derivative Nonlinear Schroedinger equation (DNLS) and hence it propagates in the form of solitons. Also, the dipole dynamics is also in the form of solitons.