Sökning: "Heterostructure"

Visar resultat 21 - 24 av 24 uppsatser innehållade ordet Heterostructure.

  1. 21. Analysis and optimasation of quantum cascade structures

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Författare :Martin Lindskog; [2012]
    Nyckelord :quantum cascade laser; QCL; quantum cascade detector; QCD; laser; Green s function theory; non-equilibrium; terahertz; solid state physics; optical gain; semiconductor; heterostructure; Physics and Astronomy;

    Sammanfattning : The quantum cascade laser (QCL) is a semiconductor heterostruc- ture using inter sub-band transitions to generate stimulated emission. The quantum cascade detector (QCD) is a similar to the QCL, but the heterostructure is tailored to absorb radiation and give a read-out current. LÄS MER

  3. 22. Spin-FET based on InGaAs/InP heterostructure

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

    Författare :Ricardo Moreira Salles De Andrade; [2011]
    Nyckelord :Spin; Spintronics; Field-effect transistor; Datta-Das transistor; Rashba effect; Low-temperature.; Physics and Astronomy;

    Sammanfattning : A new design based on the spinFET proposed by Datta-Das was fabricated, using a channel defined by etching on a 2DEG material and nanomagnets as top-gates. The magnetotransports properties were measured at low temperatures. LÄS MER

  4. 23. Light emitting diodes based on n-type ZnO nanorods and p-type organic semiconductors

    Uppsats för yrkesexamina på grundnivå, Institutionen för teknik och naturvetenskap

    Författare :Raja Sellappan; [2008]
    Nyckelord :ZnO; ACG; organic; Inorganic; Polymer; nanorods;

    Sammanfattning : The aim of this thesis work was to fabricate a hybrid LED using organic-inorganic ZnO materials. The goal of the project was to get an efficient white light emission from zinc oxide (ZnO) nanorods active layer. LÄS MER

  5. 24. Photonic Crystal Designs (PCD)

    Magister-uppsats, Högskolan i Halmstad

    Författare :Adnan daud Khan; Muhammad Noman; []
    Nyckelord :Finite Difference Time Domain Method FDTD ; Photonic Crystals; MIT Electromagnetic Eq; uation Propagation Software MEEP ;

    Sammanfattning : Photonic Crystal (PC) devices are the most exciting advancement in the field of photonics. The use of computational techniques has made considerable improvements in photonic crystals design. We present here an ultrahigh quality factor (Q) photonic crystal slab nanocavity formed by the local width modulation of a line defect. LÄS MER