Search for dissertations about: "negative index material"

Showing result 1 - 5 of 24 swedish dissertations containing the words negative index material.

  2. 1. Dispersion Engineering : Negative Refraction and Designed Surface Plasmons in Periodic Structures

    Author : Zhichao Ruan; Min Qiu; Henri Benisty; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photonic crystal; dispersion property; negative refraction; surface plasmon polariton; designed surface plasmon; negative index material; layer-KKR method; finite-difference time-domain method; plane wave method; subwavelength imaging; open cavity; enhanced transmission; slowing light; Photonics; Fotonik;

    Abstract : 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. READ MORE

  4. 2. Wave propagation in graded material composites with extraordinary properties

    Author : Brage B. Svendsen; Mariana Dalarsson; Martin Norgren; Astrid Aksnes; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; gradient-index; waveguides; gold nanoparticles; cancer treatment; left-handed media; negative index materials; metamaterials; Electrical Engineering; Elektro- och systemteknik;

    Abstract : 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. READ MORE

  5. 3. InP-based photonic crystals : Processing, Material properties and Dispersion effects

    Author : Audrey Berrier; Srinivasan Anand; Alfred Forchel; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photonic crystals; indium phosphide; photonic bandgap; Bloch modes; slow light; dispersion; coupled cavity waveguides; chemically assisted ion beam etching; lag effect; cavities; optical losses; carrier transport; carrier lifetimes; negative refraction; photonic bandstructure; Physics; Fysik;

    Abstract : 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. READ MORE

  6. 4. Comparative Study of Chemical Additives Effects on Dry Grinding Performance

    Author : Vitalis Chipakwe; Saeed Chehreh Chelgani; Jan Rosenkranz; Tommy Karlkvist; Kirsten Claire Corin; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Energy; Grinding aid; Flowability; Dry grinding; FT4 Powder Rheometer; Surface properties; Mineral Processing; Mineralteknik;

    Abstract : 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. READ MORE

  7. 5. Influence of the properties of bio-coal as a substitute for fossil coal in carbon composite agglomerates and in coke

    Author : Asmaa El-Tawil; Lena Sundqvist Ökvist; Bo Björkman; Timo Fabritius; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bio-coal; devolatilization; bio-agglomerates; bio-coke; Centrumbildning - Centrum för avancerad gruvteknik och metallurgi CAMM ; Centre - Centre for Advanced Mining Metallurgy CAMM ; Process Metallurgy; Processmetallurgi;

    Abstract : 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. READ MORE