Search results for "Spatial dispersion"

showing 2 items of 2 documents

Effects of spatial dispersion and damping on exciton absorption

1986

Exciton absorption is studied in the spatially dispersive case. The energy-propagation properties of the medium are used to define the absorption coefficient. The interplay of dispersion and damping in determining the absorption coefficient is discussed and a critical value of the damping above which the dispersion effects disappear is derived analytically. Furthermore, the dependence of the spectral and of the integrated absorption coefficient on the auxiliary boundary condition is discussed.

OpticsMaterials scienceCondensed matter physicsbusiness.industryExcitonAttenuation coefficientSpatial dispersionDispersion (optics)Absorption cross sectionBoundary value problembusinessAbsorption (electromagnetic radiation)Critical valuePhysical Review B
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Spatial dispersion intensity measure of phase concentration distributions and its applications to quantitative characterization, distinguishing and c…

2008

A method of evaluation of spatial dispersion of structures is presented. A quantitative parameter measuring spatial dispersion is introduced. It is shown that this parameter indeed measures spatial dispersion. A classification of bubble flow structures based on values of this parameter is proposed. An example of application of the method to real flow structures is presented.

business.industryProcess Chemistry and TechnologyGeneral Chemical EngineeringBubblePhase (waves)Energy Engineering and Power TechnologyGeneral ChemistryMeasure (mathematics)Industrial and Manufacturing EngineeringCharacterization (materials science)Physics::Fluid DynamicsOpticsFlow (mathematics)Spatial dispersionBubble flowStatistical physicsbusinessIntensity (heat transfer)MathematicsChemical Engineering and Processing: Process Intensification
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