In the work, there have been investigated the optical power limiting effects which occur in the nonlinear photonic crystals possessing saturable Kerr nonlinearity. The method is proposed which allows exact determination of the parameters of the structure as well as the radiation parameters which provide the limiting effect.

We generalize a construction of the Néron model for a family of intermediate Jacobians due to Green, Griffiths and Kerr by using the theory of mixed Hodge modules. It is a topological group defined over any partial compactification of the base space, and it ‘graphs’ admissible normal functions. Moreover, there is a stratification of the partial compactification such that the restriction over ea...

We consider a model in which accelerated particles experience line–elements with maximal acceleration corrections that are introduced by means of successive approximations. It is shown that approximations higher than the first need not be considered. The method is then applied to the Kerr metric. The effective field experienced by accelerated test particles contains corrections that vanish in t...

Electric-field-induced birefringence of a polymer-stabilized blue-phase liquid crystal BPLC is investigated. In the low field region, conventional Kerr effect holds. As the electric field increases, the induced birefringence gradually saturates and deviates from Kerr effect. An exponential convergence model, called extended Kerr effect, is proposed to fit the experimental data. Good agreement b...

In the context of the natural splitting, the standard relative dynamics can be expressed in terms of gravito-electromagnetic fields, which allow to formally introduce a gravito-magnetic Aharonov-Bohm effect. We showed elsewhere that this formal analogy can be used to derive the Sagnac effect in flat space-time as a gravito-magnetic AharonovBohm effect. Here, we generalize those results to study...

We have carried out a detailed study of the magnetic switching in square lattice cobalt antidot arrays with periods ranging from 2 m down to 200 nm antidot size=antidot separation . Magneto-optical Kerr effect measurements show first a small change in the magnetization due to a reversible rotation of the magnetic spins in the antidot rows, followed by a large change due to reversal of the antid...

We present measurement and analysis techniques that allow the complex magneto-conductivity tensor to be determined from measurements of the complex Faraday (θF) and Kerr (θK) angles. θF and θK are measured in a Ga1−xMnxAs and SrRuO3 films. Thick film transmission and reflection equations are used to convert the complex θF and θK into the complex longitudinal conductivity σxx and the complex tra...

We discuss the physical interpretation of stress-energy tensors that source static spherically symmetric Kerr-Schild metrics. We find that the sources of such metrics with no curvature singularities or horizons do not simultaneously satisfy the weak and strong energy conditions. Sensible stress-energy tensors usually satisfy both of them. Under most circumstances, these sources are not perfect ...

The equation of cosmic string loops in Kerr-de Sitter spacetimes is derived. Having solved the equation numerically, we find that the loops can expand and exist except for too small ones.