Regensburg 2013 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 27: Joint Poster Session: Functionalized semiconductor nanowires (DS, jointly with HL); Resistive switching (DS, jointly with DF, KR, HL)

HL 27.2: Poster

Monday, March 11, 2013, 17:00–20:00, Poster B1

Tailoring CdS nanowire lasing resonators — •Robert Röder¹, Sebastian Geburt¹, Andreas Johannes¹, Markus Glaser², Alois Lugstein², and Carsten Ronning¹ — ¹Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena — ²Institut für Festkörperelektronik, TU Wien, Floragasse 7, A-1040 Wien

The nanophotonics research for the development of on-chip optical components has to be intensified due to the forthcoming limits of conventional electronic integrated circuits. Semiconductor nanowires mark the physical size limit of a multimode photonic laser system. Thus, they are promising for circumventing these limits via optical data transmission and processing. The green spectral range around 2.4 eV is made accessible by high quality VLS synthesized cadmium sulfide nanowires (CdS NW) acting as Fabry-Pérot laser resonators with a remarkable low threshold of 10 kW/cm² at room temperature [Geburt et al, Nanotechnology 23, 365204 (2012)]. The resulting task for the processing of CdS nanolasers with reproducible properties remains in defining the resonator: The mode spacing can be adjusted by reducing the cavity length. The reflectivity of the guided modes can be enhanced as well by polishing the facet ends. Thus, preparation techniques for tailoring the resonator are demonstrated using focused ion beams (FIB) and a focused laser beam.