TY - JOUR AU - Blankenburg, S. AU - Rauls, E. AU - Schmidt, Wolf Gero ID - 13577 IS - 2 JF - physica status solidi (c) SN - 1862-6351 TI - The physics of highly ordered molecular rows VL - 7 ER - TY - JOUR AU - Sanna, Simone AU - Gavrilenko, Alexander V. AU - Schmidt, Wolf Gero ID - 13578 JF - physica status solidi (c) SN - 1862-6351 TI - Ab initioinvestigation of the LiNbO3(0001) surface ER - TY - JOUR AU - Sanna, Simone AU - Gavrilenko, Alexander V. AU - Schmidt, Wolf Gero ID - 13579 IS - 2 JF - physica status solidi (c) SN - 1862-6351 TI - Ab initioinvestigation of the LiNbO3(0001) surface VL - 7 ER - TY - JOUR AU - Wippermann, S. AU - Schmidt, Wolf Gero AU - Thissen, P. AU - Grundmeier, Guido ID - 13580 IS - 2 JF - physica status solidi (c) SN - 1862-6351 TI - Dissociative and molecular adsorption of water onα-Al2O3(0001) VL - 7 ER - TY - JOUR AB - We report a systematic study of the photoluminescence properties of ZnO nanostructures. In particular, mesoporous ZnO powders of varying surface-to-mass ratio are investigated and compared to a bulk reference. At low temperatures the emission from higher-energy states is very pronounced and even dominant for samples with high surface-to-mass ratio. AU - Schwalm, Michael AU - Horst, Swantje AU - Chernikov, Alexej AU - Rühle, Wolfgang W. AU - Lautenschläger, Stephan AU - Klar, Peter J. AU - Meyer, Bruno K. AU - Waitz, Thomas AU - Tiemann, Michael AU - Chatterjee, Sangam ID - 25977 JF - physica status solidi (c) SN - 1610-1634 TI - Time-resolved photoluminescence study of mesoporous ZnO nanostructures ER - TY - JOUR AB - The recently developed two-dimensional Fourier-Transform-Spectroscopy (2DFTS) in the optical regime has been established as an elegant experiment, which has manifold of applications in the investigation of semiconductor nanostructures. Here we focus on the real and imaginary part 2DFT spectra. As predicted recently, using rephasing and non-rephasing modes, we are able to determine the homogeneous and inhomogeneous broadenings of coupled excitonic resonances even for weak disorder where photon-echo data are not useful. Computed real and imaginary parts of the 2DFTS for rephasing and non-rephasing modes are compared with experimental data of a GaAs quantum well. It is demonstrated, that phase sensitive data for the rephasing and non-rephasing modes are able to accurately provide the disorder induced broadening in a complex coupled system for each transition separately. AU - Kuznetsova, Irina AU - Thomas, Peter AU - Meier, Torsten AU - Zhang, Tianhao AU - Cundiff, Steven T. ID - 24983 IS - 2 JF - physica status solidi (c) SN - 1610-1634 TI - Determination of homogeneous and inhomogeneous broadenings of quantum-well excitons by 2DFTS: An experiment-theory comparison VL - 6 ER - TY - JOUR AB - A microscopic analysis of the emitted radiation of a semiconductor nanostructure after excitation with an extremely intense ultrashort laser pulse is presented. It is shown that the extreme nonlinear optical response is not sufficiently described by pure interband transitions but one has to include intraband effects as well. Numerical solutions of extended Bloch equations that include the coupled inter- and intraband dynamics are presented. For large excitation intensities, the intraband effects strongly modify the polarization dynamics and lead to a strong enhancement of high-harmonic generation compared to pure interband dynamics. AU - Golde, Daniel AU - Meier, Torsten AU - Koch, Stephan W. ID - 24982 IS - 2 JF - physica status solidi (c) SN - 1610-1634 TI - Microscopic analysis of high-harmonic generation in semiconductor nanostructures VL - 6 ER - TY - JOUR AB - Phonon-assisted singlet-singlet relaxation in semiconductor quantum dot molecules is studied theoretically. Laterally coupled quantum dot structures doped with two electrons are considered. We take into account interaction with acoustic phonon modes via deformation potential and piezoelectric coupling. We show that piezoelectric mechanism for the considered system is of great importance and for some ranges of quantum dot molecule parameters is the dominant contribution to relaxation. It is shown that the phonon-assisted tunneling is much faster (down to ∼ 6 ps even at zero temperature) in comparison with other decoherence processes. The influence of Coulomb interaction is discussed and its consequences are indicated. We calculate the relaxation rates for GaAs quantum dot molecules and study the dependence on quantum dot size, distance and offset between the constituent quantum dots. In addition the temperature dependence of the tunneling rates is analyzed. AU - Grodecka, Anna AU - Machnikowski, Paweł AU - Förstner, Jens ID - 4317 IS - 2 JF - physica status solidi (c) KW - tet_topic_qd SN - 1610-1634 TI - Theoretical study of phononassisted singlet-singlet relaxation in two-electron semiconductor quantum dot molecules VL - 6 ER - TY - JOUR AU - Richter, M. AU - Hugues, M. AU - Damilano, B. AU - Massies, J. AU - Duboz, J.-Y. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8666 JF - physica status solidi (c) SN - 1610-1634 TI - 1.5 µm luminescence from InAs/GaxIn1–xNyAs1–y quantum dots grown on GaAs substrate ER - TY - JOUR AU - Greilich, A. AU - Oulton, R. AU - Zhukov, E. A. AU - Yugova, I. A. AU - Yakovlev, D. R. AU - Bayer, M. AU - Shabaev, A. AU - Efros, Al. L. AU - Merkulov, I. A. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. ID - 8673 JF - physica status solidi (c) SN - 1610-1634 TI - Electron spin coherence in singly charged (In,Ga)As/GaAs quantum dots ER -