Optical properties of single semiconductor nanowires and nanowire ensembles [Elektronische Ressource] : probing surface physics by photoluminescence spectroscopy / Carsten Pfüller. Gutachter: Henning Richert ; W. Ted Masselink ; Pierre Lefebvre

Optical properties of single semiconductor nanowires and nanowire ensembles Probing surface physics by photoluminescence spectroscopy DISSERTATION zur Erlangung des akademischen Grades Dr. rer. nat. im Fach Physik eingereicht an der Mathematisch-Wissenschaftlichen Fakultät I Humboldt-Universität zu Berlin von Dipl.-Phys. Carsten Pfüller 10.11.1980, Berlin Präsident der Humboldt-Universität zu Berlin: Prof. Dr. Jan-Hendrik Olbertz Dekan der mathematisch-Wissenschaftlichen Fakultät I: Prof. Dr. Andreas Herrmann Gutachter: (I.) Prof. Dr. Henning Richert (II.) . W. Ted Masselink (iii) Dr. Pierre Lefebvre Datum der Promotion: 27. 06. 2011 AbstractThis thesis presents a detailed investigation of the optical properties of semiconduc-tor nanowires (NWs) in general and single GaN NWs and GaN NW ensembles inparticular by photoluminescence (PL) spectroscopy.NWs are often considered as potential building blocks for future nanometer-scaleddevices. This vision is based on several attractive features that are generally ascribedto NWs. For instance, they are expected to grow virtually free of strain and de-fects even on substrates with a large structural mismatch. In the first part of thethesis, some of these expectations are examined using semiconductor NWs of dif-ferent materials.