Optimised nano-engineered 1-D magnetophotonic crystals for integrated-optical modulators

The optimization of multilayer ID megnetophotonic crystals with mulitple nano-engineered defects enables novel practical photonics applications. The properties of several optimized structures suitable for infrared intensity modulators are discussed. A novel approach to the design of integrated multi-channel WDM/DWDM transmission loss equalizers is proposed. We also show the effect of material absorption on the spectral properties of magnetic phtonic crystals, which is a factor of primary importance for the design of short-wavelenght infrared modulators

High-Performance Thin-Film Garnet Materials for Magneto-Optic and Nanophotonic Applications

Since the 1960\u27s, Magneto-optic (MO) garnet materials have been studied extensively. These materials can possess world-record MO performance characteristics in terms of Faraday rotation and optical quality. Among the rear-earth-doped garnets, the Bi-substituted iron garnet is the best candidate for use as a functional material in different integrated-optics, imaging/image processing applications and also in forward-looking applications e.g. the design of metamaterials with non-reciprocal properties. We have established a set of technologies for fabricating ferrimagnetic garnet films of type (BiDy)3(FeGa)5O12 and also garnet-oxide nanocomposite (BiDy)3(FeGa)5O12 : Bi2O3 layers possessing record-high MO quality across the visible spectral range using RF-magnetron sputtering and oven annealing. Our MO garnet films possess excellent optical and magnetic properties, which make them very attractive and promising for a large range of optoelectronic, photonics-related and MO imaging applications

ON POSSIBLE DIRECTIONS OF DEVELOPING MATHEMATICAL ECOLOGY

The problem of joint use of population and mass energy approaches in modeling ecosystems is discussed. On the example of three problems: modeling of vegetation dynamics under climate change; modeling of connection between species number and individual metabolism; modeling of population mobility, the problem of mathematical description of ecological objects is discussed. The central questions are whether typical variables – population size and nutrient concentrations – are sufficient to describe ecological systems, and whether they can be measured together simultaneously. The opinion is expressed that in the study of ecological systems it is necessary to borrow methodological developments of modern physics, but at the same time systematically and carefully coordinate the systems of concepts used for environmental studies with physical and mathematical systems of concepts