a mathematical model is presented in the present study to control‎ ‎the light propagation in an inhomogeneous media‎. ‎the method is ‎based on the identification of the optimal materials distribution‎ ‎in the media such that the trajectories of light rays follow the‎ ‎desired path‎. ‎the problem is formulated as a distributed parameter ‎identification problem and it is solved by a numerical met...

We describe a unified numerical model which allows fast and accurate simulation of nonlinear light propagation in nanoparticle composites, including various effects such as group velocity dispersion, second- third-order nonlinearity, quasi-free-carrier formation plasma contributions, exciton dynamics, scattering, so on. A developed software package, Simulator Light Propagation Composites (solpi...

We solve the general problem of mixing of electromagnetic and scalar or pseudoscalar fields coupled by axion-type interactions Lint = gφφ ǫμναβF μνFαβ . The problem depends on several dimensionful scales, including the magnitude and direction of background magnetic field, the pseudoscalar mass, plasma frequency, propagation frequency, wave number, and finally the pseudoscalar coupling. We apply...

The paper deals with the propagation of a finite-amplitude circularly polarized electromagnetic plane wave through a fully ionized hot collisionless plasma, composed of Q ( > 1) types of ions and of electrons, as a strict solution of the non-relativistic self-consistent Vlasov equations within the scope of some given applicability criterions. A constant magnetic field and a constant total plasm...

High conversion efficiency ~0.1%! into second harmonic light generated in the interaction of a short-pulse intense laser with underdense plasma has been observed. In this experiment the plasma is created by optical field ionization of hydrogen or helium gas. Second harmonic spectra observed in the forward direction show Stokes and anti-Stokes satellites. This is due to the interaction of the se...

We have implemented a holographic system to study the propagation of femtosecond laser pulses with high temporal 150 fs and spatial resolutions 4 m . The phase information in the holograms allows us to reconstruct both positive and negative index changes due to the Kerr nonlinearity positive and plasma formation negative , and to reconstruct three-dimensional structure. Dramatic differences wer...

The generation of sub-2 fs light pulses in the UV is numerically demonstrated, using frequency conversion in filamentation regime. Few-cycle pulses emitted at 266 nm keep their temporal shape over several tens of centimeters. Self-compression results from the interplay between Kerr self-focusing and a low-density plasma, which continuously defocuses the pulse over extended propagation ranges.