Browsing 02 Physical Sciences by Author "Tan Hark"

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Browsing 02 Physical Sciences by Author "Tan Hark"

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  • Controlling the properties of InGaAs quantum dots by selective-area epitaxy 
    Mokkapati Sudha; Lever Penelope; Tan Hark; Jagadish Chennupati; Mcbean Katie; Phillips Matthew (American Institute of Physics, 2005)
    Selective growth of InGaAs quantum dots on GaAs is reported. It is demonstrated that selective-area epitaxy can be used for in-plane bandgap energy control of quantum dots. Atomic force microscopy and cathodoluminescence ...
  • Observation of blue shifts in ZnO/ZnMgO multiple quantum well structures by ion-implantation induced intermixing 
    Coleman V; Buda M; Tan Hark; Jagadish Chennupati; Phillips Matthew; Koike K; Sasa S; Inoue M; Yano M (Institute of Physics Publishing, 2006)
    Implantation with low-energy (80 keV) oxygen ions and subsequent rapid thermal annealing at 800 ◦C are used to induce intermixing in a stack of 19 ZnO/Zn0.7Mg0.3O multiple quantum wells grown on sapphire by molecular beam ...
  • Tuning the bandgap of InAs quantum dots by selective-area MOCVD 
    Mokkapati Sudha; Wong-Leung Jennifer; Tan Hark; Jagadish Chennupati; Mcbean Katie; Phillips Matthew (IOP Publishing Ltd, 2008)
    In-plane bandgap energy control of InAs quantum dots (QDs) grown on GaAs substrates is demonstrated using selective-area epitaxy. Transmission electron microscopy and cathodoluminescence are used for characterization of ...