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HL: Fachverband Halbleiterphysik

HL 30: Poster: Quantum dots and wires: Preparation, characterization, optical properties and transport

HL 30.25: Poster

Montag, 31. März 2014, 17:00–20:00, P2

Intense intra-3d luminescence and waveguide properties of single Co doped ZnO nanowires — Sebastian Geburt¹, •Markus Schwiderke¹, Robert Röder¹, Uwe Kaiser², Wolfram Heimbrodt², and Carsten Ronning¹ — ¹Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena — ²Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg

The transition metal Co is well-known as optically active luminescence center in semiconductors. Cobalt doped nanowires would therefore take advantage of their morphology in providing photonic waveguiding for new optoelectronic nano-devices such as nanowire LEDs or nanolasers. Homogeneous doping of ZnO nanowires (NW) with transition metal Co is achieved by ion implantation and subsequent annealing procedures provide excellent optical activation of the luminescence centers. Excitation of the Co ions was observed by either resonant absorption or by energy transfer from the ZnO host with lifetimes of ~ 8 ns. The waveguide properties of single doped NWs were characterized using spatially resolved microPL-measurements [Geburt et al, Phys. status solidi (RRL), 10/2013, 886].