TY - JOUR AU - Marquardt, Bastian AU - Geller, Martin AU - Lorke, Axel AU - Reuter, Dirk AU - Wieck, Andreas D. ID - 7987 IS - 10 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - A two-dimensional electron gas as a sensitive detector to observe the charge carrier dynamics of self-assembled QDs VL - 42 ER - TY - JOUR AB - An intentional positioning of optically active quantum dots using site-selective growth by a combination of molecular beam epitaxy (MBE) and focused ion beam (FIB) implantation in an all-ultra-high-vacuum (UHV) setup has been successfully demonstrated. A square array of periodic holes on GaAs substrate was fabricated with FIB of 30 keV ions followed by an in situ annealing step. Subsequently, the patterned holes were overgrown with an optimized amount of InAs in order to achieve site-selective growth of the QDs on the patterned holes. Under well-optimized conditions, a selectivity of single quantum dot growth in the patterned holes of 52% was achieved. Thereafter, carrier injection and subsequent radiative recombination from the positioned InAs/GaAs self-assembled QDs was investigated by embedding the QDs in the intrinsic part of a GaAs-based p–i–n junction device. Electroluminescence spectra taken at 77 K show interband transitions up to the fifth excited state from the QDs. AU - Mehta, Minisha AU - Reuter, Dirk AU - Melnikov, Alexander AU - Wieck, Andreas D. AU - Michaelis de Vasconcellos, Steffen AU - Baumgarten, Tim AU - Zrenner, Artur AU - Meier, Cedrik ID - 4551 IS - 10 JF - Physica E: Low-dimensional Systems and Nanostructures KW - Molecular beam epitaxy KW - Focused ion beam KW - Self-assembled quantum dot KW - Electroluminescence SN - 1386-9477 TI - Intentionally positioned self-assembled InAs quantum dots in an electroluminescent p–i–n junction diode VL - 42 ER - TY - JOUR AB - Here we report on investigations on CdSe quantum dots incorporated in ZnSe based Schottky photodiodes with near-field shadow masks. Photoluminescence and photocurrent of individual quantum dots were studied as a function of the applied bias voltage. The exciton energy of the quantum dot ground state transition was shifted to the excitation energy by using the Stark effect tuning via an external bias voltage. Under the condition of resonance with the laser excitation energy we observed a resonant photocurrent signal due to the tunnelling of carriers out of the quantum dots at electric fields above 500 kV/cm. AU - Panfilova, M. AU - Michaelis de Vasconcellos, S. AU - Pawlis, A. AU - Lischka, K. AU - Zrenner, Artur ID - 4552 IS - 10 JF - Physica E: Low-dimensional Systems and Nanostructures KW - CdSe/ZnSe quantum dots KW - Photodiode KW - Quantum confined Stark Effect KW - Photocurrent KW - II–VI Semiconductors SN - 1386-9477 TI - Resonant photocurrent-spectroscopy of individual CdSe quantum dots VL - 42 ER - TY - JOUR AU - Piegdon, Karoline A. AU - Offer, Matthias AU - Lorke, Axel AU - Urbanski, Martin AU - Hoischen, Andreas AU - Kitzerow, Heinz-Siegfried AU - Declair, Stefan AU - Förstner, Jens AU - Meier, Torsten AU - Reuter, Dirk AU - Wieck, Andreas D. AU - Meier, Cedrik ID - 7993 IS - 10 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator VL - 42 ER - TY - JOUR AB - GaAs-based semiconductor microdisks with high quality whispering gallery modes (Q44000) have been fabricated.A layer of self-organized InAs quantumdots (QDs) served as a light source to feed the optical modes at room temperature. In order to achieve frequency tuning of the optical modes, the microdisk devices have been immersed in 4 – cyano – 4´-pentylbiphenyl (5CB), a liquid crystal(LC) with a nematic phase below the clearing temperature of TC≈34°C .We have studied the device performance in the temperature rangeof T=20-50°C, in order to investigate the influence of the nematic–isotropic phase transition on the optical modes. Moreover,we havea pplied an AC electric field to the device,which leads in the nematic phase to a reorientation of the anisotropic dielectric tensor of the liquid crystal.This electrical anisotropy can be used to achieve electrical tunability of the optical modes.Using the finite-difference time domain (FDTD) technique with an anisotropic material model, we are able to describe the influence of the liquid crystal qualitatively. AU - Piegdon, Karoline A. AU - Offer, Matthias AU - Lorke, Axel AU - Urbanski, Martin AU - Hoischen, Andreas AU - Kitzerow, Heinz-Siegfried AU - Declair, Stefan AU - Förstner, Jens AU - Meier, Torsten AU - Reuter, Dirk AU - Wieck, Andreas D. AU - Meier, Cedrik ID - 4123 IS - 10 JF - Physica E: Low-dimensional Systems and Nanostructures KW - tet_topic_qd KW - tet_topic_microdisk SN - 1386-9477 TI - Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator VL - 42 ER - TY - JOUR AB - Very clean single photon emission from a single InGaAs/GaAs quantum dot is demonstrated by the use of a coherent optical state preparation. We present a concept for single photon emission, which uses p-shell Rabi-flopping followed by a sequence of relaxation and recombination. The proof of the (clean) single photon emission is performed by photon correlation measurements. AU - Ester, P. AU - Lackmann, L. AU - Hübner, M.C. AU - Michaelis de Vasconcellos, S. AU - Zrenner, Artur AU - Bichler, M. ID - 4556 IS - 6 JF - Physica E: Low-dimensional Systems and Nanostructures KW - Antibunching KW - Single photon emission KW - Rabi oscillation KW - Coherent manipulation SN - 1386-9477 TI - p-Shell Rabi-flopping and single photon emission in an InGaAs/GaAs quantum dot VL - 40 ER - TY - JOUR AU - Marquardt, Bastian AU - Russ, Marco AU - Lorke, Axel AU - Meier, Cedrik AU - Reuter, Dirk AU - Wieck, Andreas D. ID - 7641 IS - 6 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Quantum dots as tunable scatterers for 2D- and 1D-electron systems VL - 40 ER - TY - JOUR AU - Grbić, B. AU - Leturcq, R. AU - Ihn, T. AU - Ensslin, K. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8594 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Strong spin–orbit interactions in carbon doped p-type GaAs heterostructures ER - TY - JOUR AU - Grbić, Boris AU - Leturcq, Renaud AU - Ihn, Thomas AU - Ensslin, Klaus AU - Reuter, Dirk AU - Wieck, Andreas D. ID - 8597 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Aharonov–Bohm oscillations in p-type GaAs quantum rings ER - TY - JOUR AU - Notthoff, C. AU - Lorke, A. AU - Reuter, Dirk ID - 8598 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - High sensitivity far-infrared detection by resonant inter-Landau-level scattering ER - TY - JOUR AU - Giesbers, A.J.M. AU - Zeitler, U. AU - Reuter, Dirk AU - Wieck, A.D. AU - Biasiol, G. AU - Sorba, L. AU - Maan, J.C. ID - 8599 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Aharonov–Bohm effect of quantum Hall edge channels ER - TY - JOUR AU - Lei, W. AU - Wibbelhoff, O. AU - Notthoff, C. AU - Marquardt, B. AU - Reuter, Dirk AU - Wieck, A.D. AU - Lorke, A. ID - 8600 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magnetic-field-induced modification of the wave-functions in InAs quantum dots ER - TY - JOUR AU - Richter, Mirja AU - Reuter, Dirk AU - Duboz, Jean-Yves AU - Wieck, Andreas D. ID - 8601 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Influence of In0.15Ga0.85As capping layers on the electron and hole energy levels of InAs quantum dots ER - TY - JOUR AU - Reuter, Dirk AU - Roescu, Razvan AU - Mehta, Minisha AU - Richter, Mirja AU - Wieck, A.D. ID - 8602 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Capacitance–voltage spectroscopy of post-growth annealed InAs quantum dots ER - TY - JOUR AU - Mehta, M. AU - Reuter, Dirk AU - Melnikov, A. AU - Wieck, A.D. AU - Remhof, A. ID - 8604 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Site-selective growth of self-assembled InAs quantum dots on focused ion beam patterned GaAs ER - TY - JOUR AU - Marquardt, Bastian AU - Russ, Marco AU - Lorke, Axel AU - Meier, Cedrik AU - Reuter, Dirk AU - Wieck, Andreas D. ID - 8605 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Quantum dots as tunable scatterers for 2D- and 1D-electron systems ER - TY - JOUR AU - Hadzibrahimovic, Adriana AU - Dethlefsen, Annelene F. AU - Reuter, Dirk AU - Wieck, Andreas D. AU - Tranitz, Hans-Peter AU - Wegscheider, Werner AU - Haug, Rolf J. ID - 8619 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - A comparison: 2D electron- and hole systems in the fractional quantum Hall regime ER - TY - JOUR AU - Wiemann, M. AU - Cetinkaya, A. AU - Wieser, U. AU - Kunze, U. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8620 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Hot-electron bend resistance in a ballistic GaAs/AlGaAs cross junction ER - TY - JOUR AU - Wieser, U. AU - Knop, M. AU - Kunze, U. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8621 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magneto-ballistic effects in non-centrosymmetric GaAs/AlGaAs cross junctions ER - TY - JOUR AU - Meier, Cedrik AU - Lüttjohann, Stephan AU - Kravets, Vasyl G. AU - Nienhaus, Hermann AU - Lorke, Axel AU - Wiggers, Hartmut ID - 7650 IS - 1-2 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Raman properties of silicon nanoparticles VL - 32 ER - TY - JOUR AU - Kailuweit, P. AU - Reuter, Dirk AU - Wieck, A.D. AU - Wibbelhoff, O. AU - Lorke, A. AU - Zeitler, U. AU - Maan, J.C. ID - 8595 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Mapping of the hole wave functions of self-assembled InAs-quantum dots by magneto-capacitance–voltage spectroscopy ER - TY - JOUR AU - Reuter, Dirk AU - Stavarache, V. AU - Wieck, A.D. AU - Schwab, M. AU - Oulton, R. AU - Bayer, M. ID - 8652 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Influence of a lateral electric field on the optical properties of InAs quantum dots ER - TY - JOUR AU - Werner, C. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8653 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Optical beam-induced current in planar two-dimensional n–p–n devices ER - TY - JOUR AU - van Tilburg, J.W.W. AU - Zeitler, U. AU - Maan, J.C. AU - Reuter, Dirk AU - Wieck, A.D. AU - Biasiol, G. AU - Sorba, L. ID - 8659 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Correlated electron states at level crossings of bilayer two-dimensional electron systems in tilted magnetic fields ER - TY - JOUR AU - Bominaar-Silkens, I.M.A. AU - Zeitler, U. AU - Christianen, P.C.M. AU - Reuter, Dirk AU - Wieck, A.D. AU - Maan, J.C. ID - 8660 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Interaction effects observed in the magnetization of a bilayer two-dimensional electron system ER - TY - JOUR AU - Sukhodub, G. AU - Hohls, F. AU - Haug, R.J. AU - Maude, D.K. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8661 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Dynamics of nuclear spins appearing in transport measurements of an inter-edge spin diode in tilted magnetic fields ER - TY - JOUR AU - Fricke, C. AU - Regul, J. AU - Hohls, F. AU - Reuter, Dirk AU - Wieck, A.D. AU - Haug, R.J. ID - 8662 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Transport spectroscopy of a quantum point contact created by an atomic force microscope ER - TY - JOUR AU - Deborde, Jean-Laurent AU - Fischer, Saskia F. AU - Kunze, Ulrich AU - Reuter, Dirk AU - Wieck, Andreas D. ID - 8663 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - In-plane tunnelling between one- and two-dimensional electron systems ER - TY - JOUR AU - Wibbelhoff, O AU - Meier, Cedrik AU - Lorke, A AU - Schafmeister, P AU - Wieck, A.D ID - 7680 IS - 2-4 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Wave function mapping of self-assembled quantum dots by capacitance spectroscopy VL - 21 ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Schwab, M. AU - Bayer, M. AU - Fafard, S. AU - Wasilewski, Z. AU - Hawrylak, P. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8676 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Coherent dynamics in InGaAs quantum dots and quantum dot molecules ER - TY - JOUR AU - Reuter, Dirk AU - Kailuweit, P. AU - Wieck, A.D. AU - Zeitler, U. AU - Maan, J.C. ID - 8680 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magnetic field dependence of hole levels in InAs quantum dots ER - TY - JOUR AU - Schmidt, R. AU - Vitzethum, M. AU - Fix, R. AU - Scholz, U. AU - Malzer, S. AU - Metzner, C. AU - Kailuweit, P. AU - Reuter, Dirk AU - Wieck, A. AU - Hübner, M.C. AU - Stufler, S. AU - Zrenner, A. AU - Döhler, G.H. ID - 8688 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Electroluminescence of single-dot nano-LEDs—optical spectroscopy of an electrically tunable few-electron/hole system ER - TY - JOUR AU - Kähler, Dirk AU - Kunze, Ulrich AU - Reuter, Dirk AU - D. Wieck, Andreas ID - 8695 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Ultrasmall nanoscale devices fabricated from compensating-layer GaAs/AlGaAs heterostructures ER - TY - JOUR AU - Riedesel, C AU - Reuter, Dirk AU - Wieck, A.D ID - 8697 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Laterally patterned high mobility two-dimensional electron gases obtained by overgrowth of focused ion beam implanted Al1−xGaxAs ER - TY - JOUR AU - Reuter, Dirk AU - Schafmeister, P. AU - Kailuweit, P. AU - Wieck, A.D. ID - 8698 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Frequency-dependent C(V) spectroscopy of the hole system in InAs quantum dots ER - TY - JOUR AU - Reuter, Dirk AU - Seekamp, A AU - Wieck, A.D ID - 8699 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of two-dimensional n- and p-type in-plane gate transistors from the same p-doped GaAs/In0.1Ga0.9As/Al0.33Ga0.67As heterostructure ER - TY - JOUR AU - Regul, J. AU - Hohls, F. AU - Reuter, Dirk AU - Wieck, A.D. AU - Haug, R.J. ID - 8700 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - High frequency conductance of a quantum point contact ER - TY - JOUR AU - Reuter, Dirk AU - Werner, C. AU - Riedesel, C. AU - Wieck, A.D. AU - Schuster, D. AU - Hansen, W. ID - 8701 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of two-dimensional p–n junctions formed by compensation doping of p-modulation doped GaAs/InyGa1−yAs/AlxGa1−x As heterostructures ER - TY - JOUR AU - Russ, M AU - Lorke, A AU - Reuter, Dirk AU - Schafmeister, P ID - 8702 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Self-assembled quantum dots as probes for Landau-level spectroscopy ER - TY - JOUR AU - Würtz, A. AU - Deviatov, E.V. AU - Lorke, A. AU - Dolgopolov, V.T. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8703 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Separately contacted edge states in the fractional quantum Hall regime ER - TY - JOUR AU - Schaapman, M.R. AU - Zeitler, U. AU - Christianen, P.C.M. AU - Maan, J.C. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8705 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magnetization of multi-component two-dimensional quantum-Hall systems ER - TY - JOUR AU - Riedesel, C AU - Meier, Cedrik AU - Schafmeister, P AU - Reuter, D AU - Wieck, A.D ID - 7682 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of high quality two-dimensional electron gases by overgrowth of focused ion beam implantation doped AlxGa1−xAs VL - 17 ER - TY - JOUR AU - Naud, C. AU - Faini, G. AU - Mailly, D. AU - Vidal, J. AU - Douçot, B. AU - Montambaux, G. AU - Wieck, A. AU - Reuter, Dirk ID - 8734 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Aharonov–Bohm cages in the GaAlAs/GaAs system ER - TY - JOUR AU - Reuter, Dirk AU - Meier, Cedrik AU - Seekamp, A AU - Wieck, A.D ID - 8737 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of two-dimensional in-plane gate transistors by focused ion beam doping VL - 13 ER - TY - JOUR AU - Schulze-Wischeler, F. AU - Zeitler, U. AU - Hohls, F. AU - Haug, R.J. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8742 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Phonon excitation of a two-dimensional electron system around ν=1 ER - TY - JOUR AU - Vitzethum, M. AU - Schmidt, R. AU - Kiesel, P. AU - Schafmeister, P. AU - Reuter, Dirk AU - Wieck, A.D. AU - Döhler, G.H. ID - 8743 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Quantum dot micro-LEDs for the study of few-dot electroluminescence, fabricated by focussed ion beam ER - TY - JOUR AU - Vitzethum, M. AU - Schmidt, R. AU - Kiesel, P. AU - Schafmeister, P. AU - Koch, J. AU - Reuter, Dirk AU - Wieck, A.D. AU - Döhler, G.H. ID - 8744 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - A novel photoconductive detector for single photon detection ER - TY - JOUR AU - Schmidt, K.H AU - Versen, M AU - Bock, C AU - Kunze, U AU - Reuter, Dirk AU - Wieck, A.D ID - 8774 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - In-plane and perpendicular tunneling through InAs quantum dots ER -