Sökning: "negative index material"
Visar resultat 1 - 5 av 25 avhandlingar innehållade orden negative index material.
1. Dispersion Engineering : Negative Refraction and Designed Surface Plasmons in Periodic Structures
Sammanfattning : The dispersion property of periodic structures is a hot research topic in the last decade. By exploiting dispersion properties, one can manipulate the propagation of electromagnetic waves, and produce effects that do not exist in conventional materials. LÄS MER
2. Wave propagation in graded material composites with extraordinary properties
Sammanfattning : I denna avhandling studeras elektromagnetisk vågutbredning i graderade materialkompositer med extraordinära egenskaper. Två sådana materialkompositsystem studeras särskilt, med hjälp av både analytiska och beräkningstekniska elektromagnetiska metoder. LÄS MER
3. InP-based photonic crystals : Processing, Material properties and Dispersion effects
Sammanfattning : Photonic crystals (PhCs) are periodic dielectric structures that exhibit a photonic bandgap, i.e., a range of wavelength for which light propagation is forbidden. The special band structure related dispersion properties offer a realm of novel functionalities and interesting physical phenomena. LÄS MER
4. Comparative Study of Chemical Additives Effects on Dry Grinding Performance
Sammanfattning : The application of chemical additives, known as grinding aids (GA), dates back to 1930 in the cement industry. As opposed to the cement industry, where the use of GAs is on the final processing step, it could be one of the first process steps in ore beneficiation. LÄS MER
5. Influence of the properties of bio-coal as a substitute for fossil coal in carbon composite agglomerates and in coke
Sammanfattning : The iron-ore-based blast furnace (BF) process is still the most dominant method for producing metallic iron units for steelmaking, and the BF is also the main contributor to the 7-9% of global CO2 emissions which, according to World Steel Association, originate from the steel industry. The steel industry is aiming to reduce CO2 emissions by different means. LÄS MER