Sökning: "Ari Friberg"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Ari Friberg.

  1. 1. Optical Properties of Nanoparticles in Composite Materials

    Författare :Lin Dong; Sergei Popov; Ari Friberg; Toralf Scharf; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Nanoparticles are synthetic structures with dimension from 1 to 100 nanometers and are various in types. Some favorable properties peculiar to the nanoparticles (generally owing to size effects) make them prevailing and beneficial for applications in different scientific and engineering fields. LÄS MER

  3. 2. Effects of surface plasmons in subwavelength metallic structures

    Författare :Srinivasan Iyer; Ari T. Friberg; N. Asger Mortensen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; suface plasmons; extraordinary transmission; metamaterials; shnets; split-ring resonators; plasmon-induced EIT; optical antennas; plasmonics;

    Sammanfattning : The study of optical phenomena related to the strong electromagnetic response of noble metals (silver (Ag) and gold (Au) being most popular) over the last couple of decades has led to the emergence of a fast growing research area called plasmonics named after 'surface plasmons' which are electron density waves that propagate along the interface of a metal and a dielectric medium. Surface plasmons are formed by the coupling of light to the electrons on the metal surface subject to the fulfillment of certain physical conditions and they are bound to the metal surface. LÄS MER

  4. 3. On ferromagnetic thin films and two-dimensional magneto-optic photonic crystals

    Författare :Amir A. Jalali Roudsar; Ari Friberg; Ilkka Tittonen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; photonic crystals; physics; Fysik; Physics; Fysik;

    Sammanfattning : This thesis presents results in two different neighboring areas of research: the magnetic properties of thin ferrite films and the application of the films in two-dimensional photonic crystals.In the first part, we investigate the accuracy of the customary method for determining the magnetic anisotropy constants of ferrite films by ferromagnetic resonance (FMR) experiment. LÄS MER

  5. 4. Structural Information Content of the Optical Field

    Författare :Per Martinsson; Ari Friberg; Karl-Heinz Brenner; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonics; Fotonik;

    Sammanfattning :  The communication modes are a mathematical technique for the description of structural information in optical fields. These modes are orthogonal, optimally  connected functions characteristic of the optical system. Mathematically they are obtained by the singular value decomposition (SVD) of the operator that represents the field propagation. LÄS MER

  7. 5. Fibre Bragg Gratings : Characterization, Realization and Simulation

    Författare :Ingemar Petermann; Ari Friberg; Sten Helmfrid; Morten Ibsen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bragg gratings; optical fibres; optical fibre components; Physics; Fysik;

    Sammanfattning : The main topic of this thesis is realization and characterization of fibre Bragg gratings. A novel versatile grating fabrication technique is developed and a number of gratings are realized, showing the potential of the system. LÄS MER