TY - CONF AU - Riedl, Thomas AU - Lindner, Jörg ID - 4029 TI - Stability of heteroepitaxial coherent growth modes on nanowire radial surfaces ER - TY - CONF AU - Riedl, Thomas AU - Lindner, Jörg ID - 4030 TI - A molecular statics study of strain fields and defect stability in axial-heteroepitaxial nanopillars ER - TY - CONF AU - Lindner, Jörg ID - 4031 TI - Making things small – for fun and for serious applications ER - TY - CONF AU - Lindner, Jörg ID - 4032 TI - Bundling of light to very small spaces with plasmons ER - TY - JOUR AB - We analyse an InAs/GaAs-based electric field tunable single quantum dot diode with a thin tunnelling barrier between a buried n þ -back contact and a quantum dot layer. In voltage- dependent photoluminescence measurements, we observe rich signatures from spatially direct and indirect transitions from the wetting layer and from a single quantum dot. By analysing the Stark effect, we show that the indirect transitions result from a recombination between confined holes in the wetting or quantum dot layer with electrons from the edge of the Fermi sea in the back contact. Using a 17 nm tunnel barrier which provides comparably weak tunnel coupling allowed us to observe clear signatures of direct and corresponding indirect lines for a series of neutral and positively charged quantum dot states. AU - Rai, Ashish K. AU - Gordon, Simon AU - Ludwig, Arne AU - Wieck, Andreas D. AU - Zrenner, Artur AU - Reuter, Dirk ID - 4276 IS - 3 JF - physica status solidi (b) KW - excitons KW - GaAs KW - InAs KW - quantum dots KW - spatially indirect transitions KW - Stark shift SN - 0370-1972 TI - Spatially indirect transitions in electric field tunable quantum dot diodes VL - 253 ER - TY - JOUR AB - Sources of single photons are key elements for applications in quantum information science. Among the different sources available, semiconductor quantum dots excel with their integrability in semiconductor on-chip solutions and the potential that photon emission can be triggered on demand. Usually, the photon is emitted from a single-exciton ground state. Polarization of the photon and time of emission are either probabilistic or pre-determined by electronic properties of the system. Here, we study the direct two-photon emission from the biexciton. The two-photon emission is enabled by a laser pulse driving the system into a virtual state inside the band gap. From this intermediate state, the single photon of interest is then spontaneously emitted. We show that emission through this higher-order transition provides a versatile approach to generate a single photon. Through the driving laser pulse, polarization state, frequency and emission time of the photon can be controlled on-the-fly. AU - Heinze, Dirk AU - Breddermann, Dominik AU - Zrenner, Artur AU - Schumacher, Stefan ID - 4330 IS - 1 JF - Nature Communications SN - 2041-1723 TI - A quantum dot single-photon source with on-the-fly all-optical polarization control and timed emission VL - 6 ER - TY - JOUR AB - We report about the fabrication and analysis of high Q photonic crystal cavities with metallic Schottky-contacts. The structures are based on GaAs n-i membranes with an InGaAs quantum well in the i-region and nanostructured low ohmic metal top-gates. They are designed for photocurrent readout within the cavity and fast electric manipulations. The cavity structures are characterized by photoluminescence and photocurrent spectroscopy under resonant excitation. We find strong cavity resonances in the photocurrent spectra and surprisingly high Q-factors up to 6500. Temperature dependent photocurrent measurements in the region between 4.5K and 310K show an exponential enhancement of the photocurrent signal and an external quantum efficiency up to 0.26. AU - Quiring, W. AU - Al-Hmoud, M. AU - Rai, A. AU - Reuter, Dirk AU - Wieck, A. D. AU - Zrenner, Artur ID - 4331 IS - 4 JF - Applied Physics Letters SN - 0003-6951 TI - Photonic crystal cavities with metallic Schottky contacts VL - 107 ER - TY - GEN AU - Alberternst, Stephan AU - Schwar, Torben ID - 5025 TI - Relevanz der Zinsschranke – eine empirische Untersuchung der betroffenen Unternehmen von 2008 bis 2012 VL - 200 ER - TY - THES AU - Rickermann, Anja ID - 5026 TI - Die Besteuerung von Personengesellschaften unter besonderer Berücksichtigung der Verlustnutzungskonzeptionen und Gewinnverwendungsoptionen - Eine Analyse der Wechselwirkungen zwischen § 10d, § 15a, § 32a und § 34a EStG ER - TY - JOUR AU - Sureth, Caren ID - 5047 IS - 5 JF - WiSt - Wirtschaftswissenschaftliches Studium SN - 0340-1650 TI - Mehr Theorie wagen: Eine neue Ausbildung für die Praxis? VL - 42 ER - TY - BOOK AU - Beverungen, Daniel AU - Fabry , Christian AU - Ganz , Walter AU - Matzner , Martin AU - Satzger , Gerhard ID - 5068 SN - 978-3-8396-0843-2 TI - Dienstleistungsinnovationen für Elektromobilität: Märkte, Geschäftsmodelle, Kooperationen ER - TY - GEN AU - Streck, Thomas ID - 5090 TI - Praktikabilität des Adjusted Winner Verfahrens bei variablem Status Quo- Punkt und exogenen Einflüssen ER - TY - CHAP AU - Fahr, Rene AU - Foit, Dörte ED - Becker, W. ED - Ulrich, P. ID - 5106 T2 - BWL im Mittelstand - Grundlagen-Besonderheiten-Entwicklungen" TI - Kleine Unternehmen - kleine Verantwortung? Theorie und Praxis unternehmerischer Verantwortung im Mittelstand ER - TY - JOUR AU - Gilroy, Bernard Michael AU - Seiler, Volker ID - 5109 IS - 8 JF - WiSt-Wirtschaftswissenschaftliches Studium TI - Event-Studien in der wirtschaftswissenschaftlichen Forschung: Das Beispiel der Übernahme von Scania durch Volkswagen VL - 44 ER - TY - JOUR AU - Thommes, Kirsten AU - Oertel, Simon ID - 5153 JF - Scandinavian Management Journal TI - History as a Source of Competitive Advantages VL - 31 ER - TY - CONF AU - Li, Li AU - Bartel, Alexandre AU - Bissyande, Tegawende F. AU - Klein, Jacques AU - Le Traon, Yves AU - Arzt, Steven AU - Rasthofer, Siegfried AU - Bodden, Eric AU - Octeau, Damien AU - McDaniel, Patrick ID - 5207 KW - CROSSING KW - ATTRACT KW - ITSECWEBSITE SN - 978-1-4799-1934-5 T2 - 2015 International Conference on Software Engineering (ICSE) TI - IccTA: Detecting Inter-Component Privacy Leaks in Android Apps ER - TY - JOUR AU - Schmitz, Hendrik ID - 5239 JF - Patient Gesundheitswesen – Mission 2030 Unsere gemeinsame Verantwortung die Zukunft zu gestalten TI - Rationalisierung vs. Rationierung Ist die Rationierung unvermeidbar? ER - TY - GEN AU - Funke, Lukas ID - 5413 TI - An LLVM Based Toolchain for Transparent Acceleration of Digital Image Processing Applications using FPGA Overlay Architectures ER - TY - GEN AU - Löcke, Thomas ID - 5416 TI - Instance-Specific Computing in Hard- and Software for Faster Solving of Complex Problems ER - TY - GEN AU - Wallaschek, Felix ID - 5419 TI - Accelerating Programmable Logic Controllers with the use of FPGAs ER -