Berlin 2005 – scientific programme

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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)