In this paper we develop a method for synthetic-aperture radar (SAR) imaging through a dispersive medium. We consider the case when the sensor and scatterers are embedded in a known homogeneous dispersive material, the scene to be imaged lies on a known surface and the radar antenna flight path is an arbitrary but known smooth curve. The scattering is modeled using a linearized (Born) scalar mo...

The relativistic theory of the time- and position-dependent energy momentum densities light in glasses other low-loss dispersive media, where different wavelengths propagate at phase velocities, has remained a largely unsolved challenge until now. This is astonishing view excellent theoretical understanding Maxwell's equations abundant experimental measurements optical phenomena media. related ...

The propagation of a Laguerre-Gaussian (LG) beam through dispersive medium is investigated. effect the doughnut-like intensity profile probe LG on group velocity studied. We find an analytical expression for out optical axis and compare with its projection onto axis. It turned that vector along at waist Rayleigh range. numerically analytically investigate helical phase front coupling field in f...

We show that a collection of two-level atoms in an optical cavity beyond the rotating wave approximation and in the dispersive-adiabatic and non-dispersive adiabatic regime constitutes a nonlinear medium and is capable of generating squeezed state of light. It is found that squeezing produced in the non-dispersive adiabatic regime is significantly high compared to that produced in the dispersiv...

This paper is concerned with the approximation of the time domain Maxwell equations in a dispersive propagation medium by a Discontinuous Galerkin Time Domain (DGTD) method. The Debye model is used to describe the dispersive behaviour of the medium. We adapt the locally implicit time integration method from [1] and derive a convergence analysis to prove that the locally implicit DGTD method for...

We study two-dimensional wave propagation in materials whose properties vary periodically in one direction only. High order homogenization is carried out to derive a dispersive effective medium approximation. One-dimensional materials with constant impedance exhibit no effective dispersion. We show that a new kind of effective dispersion may arise in two dimensions, even in materials with const...