Sökning: "beam emission spectroscopy"

Visar resultat 16 - 20 av 40 avhandlingar innehållade orden beam emission spectroscopy.

  1. 16. OH and Soot Optical Diagnostics for Combustion Applications for Combustion Applications

    Författare :Zheming Li; Förbränningsfysik; []
    Nyckelord :laser-induced fluorescence spectroscopy; Soot emission; combustion diagnostics; Fysicumarkivet A:2016:Li;

    Sammanfattning : Optical diagnostics are remote non-intrusive sensing techniques. The thesis work concerns the use of OH and soot optical diagnostics for combustion research.Internal combustion (IC) engines are widely used for the generation of power and for transportation purposes. LÄS MER

  3. 17. Growth of ZnO/GaN distributed Bragg reflectors by plasma-assisted molecular beam epitaxy

    Författare :David Adolph; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Oxides; GaN; distributed Bragg reflector; MBE; molecular beam epitaxy; ZnO; Nitrides; DBR;

    Sammanfattning : This thesis describes epitaxial growth of ZnO/GaN distributed Bragg reflectors by hybrid plasma-assisted molecular beam epitaxy on GaN(0001). The unique hybrid approach employed the same growth chamber for continuous growth of both ZnO and GaN without exposing the layers to the ambient conditions. LÄS MER

  4. 18. Fluorescence correlation spectroscopy, photophysical aspects and applications

    Författare :Jerker Widengren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Fluorescence correlation spectroscopy (FCS) is a technique where dynamic processes on the molecular level are studied by the use of fluorescence. The molecules are excited within a focused stationary laser beam and the resulting fluorescence fluctuations are analyzed in the form of an autocorrelation function. LÄS MER

  5. 19. Growth and Characterization of Strain-engineered Si/SiGe Heterostructures Prepared by Molecular Beam Epitaxy

    Författare :Ming Zhao; Wei-Xin Ni; Göran Hansson; Kang L. Wang; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Si SiGe; Strain engineering; Molecular beam epitaxy; THz; Quantum cascade; Strain relaxation; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The strain introduced by lattice mismatch is a built-in characteristic in Si/SiGe heterostructures, which has significant influences on various material properties. Proper design and precise control of strain within Si/SiGe heterostructures, i.e. LÄS MER

  7. 20. Polarization-resolved photoluminescence spectroscopy of III-nitride quantum dots

    Författare :Supaluck Amloy; Fredrik Karlsson; Per-Olof Holtz; Jørn M. Hvam; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : In this thesis, results from studies on (In)GaN quantum dots (QDs) are presented, including investigations of the structural, optical and electronic properties. The experimental studies were performed on GaN and InGaN QDs grown by molecular beam epitaxy, taking advantage of the Stranki-Krastanov growth mode for the GaN QD samples and the composition segregation for the InGaN QD samples. LÄS MER