Analytical approach to dielectric optical bent slab waveguides

A rigorous classical analytic frequency domain model of con?ned optical wave propagation along 2D bent slab waveguides and curved dielectric interfaces is investigated, based on a piecewise ansatz for bend mode profiles in terms of Bessel and Hankel functions. This approach provides a clear picture of the behaviour of bend modes, concerning their decay for large radial arguments or effects of varying bend radius. Fast and accurate routines are required to evaluate Bessel functions with large complex orders and large arguments. Our implementation enabled detailed studies of bent waveguide properties, including higher order bend modes and whispering gallery modes, their interference patterns, and issues related to bend mode normalization and orthogonality properties

Simulations of vertically-coupled microdisk-resonators by 3-D vectorial coupled mode theory

Fully vectorial 3D frequency-domain simulations of vertically coupled integrated-optical microdisk-resonators are described. The 'rigorous' coupled mode theory model combines numerically computed bend modes of the cavity disk and guided modes of the straight bus waveguides

Athletic stadium

Občanská dvoupodlažní budova sloužící jako zázemí pro sportovce s dalším využitím pro kanceláře, cafe-bar, fitness centrum a billiard klub. Objekt je projektován ve městě Jihlava v areálu fotbalových hřišť s atletickým oválem. Stavba je situována v blízkosti letního kina, dětského hřiště a Zoologické zahrady Jihlava. Zastavěná plocha pozemku je 2006 m2. Maximální kapacita objektu je 418 osob a kapacita tribun 430 osob. Objekt je vystavěn z keramických tvárnic Porotherm. Zastřešení je z dřevěných příhradových vazníků se sklonem tří stupňů. Návrh objektu klade důraz na dispoziční řešení, požární bezpečnost a energetickou úsporu.Civil two floors building serving as a base for athletes with further use for offices, cafe-bar, a fitness center and billiards club. The building is being designed in Jihlava in the area of football pitches with athletic oval. The building is situated near the cinema, children's playground and the Zoological Garden in Jihlava. Built-up land area is 2006 m2. The maximum capacity of the building is 418 persons and 430 capacity of grandstands. The building is constructed of ceramic bricks Porotherm. The roof construction is made of wooden trusses with a slope of three degrees. The draft of the object emphasizes the building layout, fire safety and energy savings.

Fluorescent polymer coated capillaries as optofluidic refractometric sensors

A capillary microresonator platform for refractometric sensing is demonstrated by coating the interior of thick-walled silica capillaries with a sub-wavelength layer of high refractive index, dye-doped polymer. No intermediate processing, such as etching or tapering, of the capillary is required. Side illumination and detection of the polymer layer reveals a fluorescence spectrum that is periodically modulated by whispering gallery mode resonances within the layer. Using a Fourier technique to calculate the spectral resonance shifts, the fabricated capillary resonators exhibited refractometric sensitivities up to approximately 30 nm/RIU upon flowing aqueous glucose through them. These sensors could be readily integrated with existing biological and chemical separation platforms such as capillary electrophoresis and gas chromatography where such thick walled capillaries are routinely used with polymer coatings. A review of the modelling required to calculate whispering gallery eigenmodes of such inverted cylindrical resonators is also presented.Kristopher J. Rowland, Alexandre François, Peter Hoffmann, and Tanya M. Monr

Possibilities of application of sustainable tourism in a chosen region

The diploma thesis deals with such terms as sustainable development and sustainable tourism. Theoretical part contains a brief description of basic terms and of sustainable development conferences. The practical part of the thesis is focused on Vysočina region, its description, possibilities of utilization of European subsidies. The end of the thesis is devoted to possibilities of application of sustainable tourism in the regio

Vývoj světové liberalizace obchodu zemědělskými výrobky

Práce podává stručný vývoj liberalizace světového obchodu zemědělskými výrobky od vzniku smlouvy GATT v roce 1947. Popsána jsou jednotlivá kola jednání a jejich výsledky. Důraz je kladen na poslední (Uruguayské) kolo jednání GATT, které završilo vývoj GATT, tato smlouva byla nahrazena Světovou obchodní organizací (WTO). Práce rozebírá závazky vzešlé z Urugayského kola a jejich naplňování. V rámci WTO bylo zahájeno v roce 2001 nové kolo jednání, kterému je věnována poslední část práce

SIMULATIONS OF VERTICALLY-COUPLED MICRODISK-RESONATORS BY 3-D VECTORIAL COUPLED MODE THEORY

Fully vectorial 3D frequency-domain simulations of vertically coupled integrated-optical microdisk-resonators are described. The “rigorous ” coupled mode theory model combines numerically computed bend modes of the cavity disk and guided modes of the straight bus waveguides

Cylindrical integrated optical microresonators: Modeling by 3-D vectorial coupled mode theory

A spatially three-dimensional (3-D), fully vectorial coupled mode theory model for the interaction between several straight or bent dielectric optical waveguides, each supporting multiple modes, is described. The frequency domain model is applied to the coupler regions of cylindrical microresonators, here considered for applications as integrated optical filters. For simple test cases, comparisons with results of beam propagation calculations and of a rigorous system mode analysis provide some validation of the approach. By combination of two coupler representations one obtains a complete 3-D vectorial microresonator description without any free parameters, that permits a convenient investigation of the influence of geometrical parameters on the spectral response. When applied to a microring resonator with pronouncedly hybrid cavity modes, the model reveals the manifold features that may appear in the spectra of these devices

Analytic Approach to Dielectric Optical Bent Slab Waveguides

A rigorous classical analytic frequency domain model of confined optical wave propagation along 2-D bent slab waveguides and curved dielectric interfaces is investigated, based on a piecewise ansatz for bend mode profiles in terms of Bessel and Hankel functions. This approach provides a clear picture of the behaviour of bend modes, concerning their decay for large radial arguments or effects of varying bend radius. Fast and accurate routines are required to evaluate Bessel functions with large complex orders and large arguments. Our implementation enabled detailed studies of bent waveguide properties, including higher order bend modes and whispering gallery modes, their interference patterns, and issues related to bend mode normalization and orthogonality properties