Sökning: "Pyramids"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet Pyramids.

  1. 1. Controlled growth of hexagonal GaN pyramids and InGaN QDs

    Författare :Anders Lundskog; Erik Janzén; Urban Forsberg; Per-Olof Holtz; Lars-Erik Wernersson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Gallium-nitride (GaN) and its related alloys are direct band gap semiconductors, with a wide variety of applications. The white light emitting diode (LED) is of particular importance as it is expected to replace energy inefficient light bulb and hazardous incandescent lamps used today. LÄS MER

  3. 2. Preattentive gaze control for robot vision

    Författare :Carl-Johan Westelius; Linköpings universitet; []
    Nyckelord :Robot vision; Resolution pyramids; Phase-based disparity estimation; Focus of attention; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : A framework for a hierarchical approach to gaze control of a robot vision system is presented, and a implementation on a simulated robot is described. The robot is equipped with a heterogeneous sampled imaging system, a fovea, resembling the varying resolution in a human retina. LÄS MER

  4. 3. InGaN Quantum Dots Grown on GaN Pyramid Arrays

    Författare :Chih-Wei Hsu; Per Olof Holtz; Robert A. Taylor; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Selective-area growth (SAG) of InGaN on GaN pyramids, which allows the formation of additional hybrid quantum structures, including quantum wires and quantum dots (QDs) in a site-controlled fashion, is attractive for both fundamental research and device application. The site-controlled growth of QDs showing sharp emission lines is seen as the first step toward the frontier quantum information application (QIA). LÄS MER

  5. 4. Time Correlated Single Photon Spectroscopy on Pyramidal Quantum Dots

    Författare :Tomas Jemsson; Fredrik Karlsson; Per-Olof Holtz; Sytjugov Ilya; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Generation of non-classical light is both of fundamental interest and a common condition for quantum information applications (QIA). One feasible type of single photon emitter for QIA is based on semiconductor quantum dots (QDs), due to their atomic-like energy structure and their possibility to be integrated with other semiconductor devices on the same chip. LÄS MER

  7. 5. Growth and Characterization of AlN : From Nano Structures to Bulk Material

    Författare :Gholamreza Yazdi; Rositza Yakimova; Mikael Syväjärvi; Zlatko Sitar; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Sammanfattning : Aluminum nitride (AlN) exhibits a large direct band gap, 6.2 eV, and is thus suitable forsolid state white-light-emitting devices. It is capable in spintronics because of its high Curietemperature if doped with transition metals. LÄS MER