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HL: Halbleiterphysik
HL 17: Poster Ib
HL 17.15: Poster
Friday, March 4, 2005, 16:30–19:00, Poster TU F
Magneto-Photoluminescence and Raman study of zinc oxide nano-pillars — •Günther M. Prinz1, Anton Reiser1, Andre Langlois1, Xinmin Cao1, Andreas Ladenburger1, Marek Potemski2, Wolfgang Limmer1, Rolf Sauer1, and Klaus Thonke1 — 1Abt. Halbleiterphysik, Universität Ulm, D-89069 Ulm — 2Grenoble High Magnetic Field Laboratory, 25 Av. de Martys, BP166
For optical characterization of zinc oxide nano-pillars grown on a-plane sapphire we used low-temperature Magneto-Photoluminescence(PL) and Raman spectroscopy. The g-Factors for electrons and holes were calculated based on Magneto-PL data. We observe similar donors and splittings as in ZnO bulk material. From splitting patterns recorded in Faraday and Voigt configuration we estimate the alignment degree of the pillars perpendicular to the a-plane of the substrate. Using Raman measurements we were able to calculate the strain parallel to the c-axis of the nano-pillars [1]. These results are consistent with high resolution x-ray diffraction data measured for comparison.
[1] Th. Gruber et al, J. Appl. Phys. 96(1) 289 (2004)