Sökning: "coherent harmonic generation"

Visar resultat 16 - 20 av 22 avhandlingar innehållade orden coherent harmonic generation.

  1. 16. Studies on high brightness electron beams for short pulses and free electron laser

    Författare :Sara Thorin; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bunch compression; sub-ps pulses; X-rays; High brightness electron beam; free electron laser; electron accelerator; collective effects.;

    Sammanfattning : Accelerator based lightsources are one of the most powerful tools today for producing high intensity radiation at very short wavelengths. While synchrotron storage rings provide a high average brilliance in a wide wavelength range, the next generation of lightsources aim towards producing ultra-short pulses in the X-ray regime. LÄS MER

  3. 17. Development of Nonlinear Microscopy for Studies of Metabolism and Tissue Engineering

    Författare :Madeleine Åkeson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; imaging; bacterial cellulose; nonlinear microscopy; Saccharomyces cerevisiae; yeast; C. elegans; Microscopy; lipid storage;

    Sammanfattning : Nonlinear microscopy techniques provide abilities for noninvasive and selective imaging of structural and chemical properties of biological systems. These techniques include coherent anti-Stokes Raman scattering (CARS) microscopy with the ability to selectively image molecular vibrations, second harmonic generation (SHG) microscopy which selectively images fiber structures, and third harmonic generation (THG) microscopy which is sensitive to interfaces between materials with different optical properties. LÄS MER

  4. 18. Characterisation and Applications of Ultrashort Extreme Ultraviolet Pulses

    Författare :Johan Norin; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ultrashort pulses; pulse characterisation; sidebands; interferometry; Atom- och molekylärfysik; acetylene; Atomic and molecular physics; High-order harmonics; XUV; Fysicumarkivet A:2002:Norin;

    Sammanfattning : When a strong laser field interacts with free atoms, harmonics up to very high orders are created. This extreme ultraviolet (XUV) radiation has interesting properties, such as spatial and temporal coherence, short pulse duration and high brightness. This thesis concentrates on the temporal aspects of this radiation. LÄS MER

  5. 19. Waveguide structures for efficient nonlinear optical conversion and distributed-feedback laser resonators

    Författare :Cristine C. Kores; Fredrik Laurell; Azzedine Boudrioua; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optics and Photonics; Optik och fotonik;

    Sammanfattning : Integrated optical devices enable the development of miniaturized componentswith increased functionality, mechanical stability, robustness and reducedcost. Integrated devices that generate, manipulate and detect light enable opticalsystems that could not be implemented otherwise, at the vanguard ofboth technology and fundamental research. LÄS MER

  7. 20. Cosmoparticle Physics and String Theory

    Författare :Stefan Sjörs; Marcus Berg; Joseph Conlon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supersymmetry; dark matter; cosmology; inflation; modifications of gravity; string theory; flux compactifications; perturbative string theory; teoretisk fysik; Theoretical Physics;

    Sammanfattning : This thesis deals with phenomenological and theoretical aspects of cosmoparticle physics and string theory. There are many open questions in these topics. In connection with cosmology we would like to understand the detailed properties of dark matter, dark energy, generation of primordial perturbations, etc. LÄS MER