Sökning: "periodic structures iii"

Hittade 4 uppsatser innehållade orden periodic structures iii.

  1. 1. Feasibility Study of X-ray Free Electron Lasers in Fourth Generation Storage Rings

    Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen; Lunds universitet/MAX IV-laboratoriet

    Författare :Jordis Hansen; [2023]
    Nyckelord :XFEL; Storage Ring; Synchrotron Radiation; Physics and Astronomy;

    Sammanfattning : This thesis studies the feasibility of a cavity based X-ray free electron laser in a fourth generation storage ring. The cavity design allows for modulation of the electron beam over several passes through the undulator. Simulations based on the PETRA IV facility are done to create the photon flux spectrum of a light pulse produced by an undulator. LÄS MER

  3. 2. Doping Layers in Quantum Cascade Lasers: A study in doping density, position and migration effects

    Master-uppsats, Lunds universitet/Matematisk fysik

    Författare :Josefin Reftlér; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Quantum Cascade Lasers (QCLs) consist of several semiconductor materi- als sandwiched together. The QCL achieves stimulated emission in the mid-IR (m-IR) to the THz region of the electromagnetic spectrum by inter-subband transitions. These parts of the electromagnetic spectrum are hard to lase in with conventional means. LÄS MER

  4. 3. Mode Matching Analysis of One-Dimensional Periodic Structures

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Martin Lindberg; [2018]
    Nyckelord :waveguide; wave propagation; electromagnetic fields; dispersion relation; mode matching; glide symmetry; periodic structures iii; V°agledare; V°agutbredning; elektromagnetiska f¨alt; dispersionsrelation; mod matchning; glid symmetri; periodiska strukturer;

    Sammanfattning : In this thesis, we analyze the electromagnetic wave propagation in waveguidestructuresexhibiting periodical geometry, including glide symmetry. The analysisis performed using a mode matching technique which correlates the different modecoefficients from separate but, connected regions in the structure. LÄS MER

  5. 4. Understanding Sn-seeded InSb nanowire growth

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

    Författare :Hengfang Zhang; [2017]
    Nyckelord :Science General;

    Sammanfattning : III-Sb semiconductor nanowires have drawn a lot of attention because of their many promising applications, such as thermoelectric generation, low power high efficient electronics and quantum transport. Gold as a catalyst seed particle has been dominating for many years assisting nanowires growth. LÄS MER