Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 31: Poster I: Devices, Quantum Dots and Quantum Wires
HL 31.46: Poster
Dienstag, 23. März 2010, 18:30–20:30, Poster D1
Optical spectroscopy of ZnO nanowires — •Nils Neubauer1, Martin Lange2, Marius Grundmann2, and Frank Cichos1 — 1Molecular Nanophotonics Group, University of Leipzig, Linnéstraße 5, 04103 Leipzig — 2Semiconductor Physics Group, University of Leipzig, Linnéstraße 5, 04103 Leipzig
Semiconductor nanowires are promising building blocks for nanoscale light emitting devices. Especially, ZnO has gained much attention due to its large exciton binding energy and energy bandgap, offering the possibility for room temperature nanoscale light emitters in the blue and UV spectral region as well as in the visible region caused by deep level defect emission. Among different synthesis methods, PLD enables defined nanowire shapes and allows the growth of nanoheterostructures, which is important for device applications, defining optical and electronic properties. We have investigated low area-density, homogeneous core/shell ZnO/ZnMgO quantum well structured nanowires grown by a two step PLD process. Optical studies were carried out in a confocal photoluminescence setup, enabling one and two photon excitation. Spectroscopic studies as well as the study of the emission characteristics were done to investigate the optical properties of these nanowires.