TY - JOUR AU - Sanna, Simone AU - Schmidt, Wolf Gero AU - Frauenheim, Th. AU - Gerstmann, Uwe ID - 13657 IS - 10 JF - Physical Review B SN - 1098-0121 TI - Rare-earth defect pairs in GaN: LDA+U calculations VL - 80 ER - TY - JOUR AU - Passmann, Regina AU - Favero, Priscila AU - Schmidt, Wolf Gero AU - Miotto, Ronei AU - Braun, Walter AU - Richter, Wolfgang AU - Kneissl, Michael AU - Esser, Norbert AU - Vogt, Patrick ID - 13658 IS - 12 JF - Physical Review B SN - 1098-0121 TI - Adsorption structure of cyclopentene on InP(001)(2×4) VL - 80 ER - TY - JOUR AU - Landmann, M. AU - Rauls, E. AU - Schmidt, Wolf Gero ID - 13665 IS - 4 JF - Physical Review B SN - 1098-0121 TI - First-principles calculations of clean Au(110) surfaces and chemisorption of atomic oxygen VL - 79 ER - TY - JOUR AU - Rockstuhl, Carsten AU - Paul, Thomas AU - Lederer, Falk AU - Pertsch, Thomas AU - Zentgraf, Thomas AU - Meyrath, Todd P. AU - Giessen, Harald ID - 1743 IS - 3 JF - Physical Review B SN - 1098-0121 TI - Transition from thin-film to bulk properties of metamaterials VL - 77 ER - TY - JOUR AU - Grbić, B. AU - Leturcq, R. AU - Ihn, T. AU - Ensslin, K. AU - Blatter, G. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8606 JF - Physical Review B SN - 1098-0121 TI - Hysteretic magnetotransport inp-typeAlxGa1−xAsheterostructures with In/Zn/Au Ohmic contacts ER - TY - JOUR AU - Hugger, S. AU - Xu, Hengyi AU - Tarasov, A. AU - Cerchez, M. AU - Heinzel, T. AU - Zozoulenko, I. V. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8611 JF - Physical Review B SN - 1098-0121 TI - Magnetic-barrier-induced conductance fluctuations in quantum wires ER - TY - JOUR AU - Hernandez, F. G. G. AU - Greilich, A. AU - Brito, F. AU - Wiemann, M. AU - Yakovlev, D. R. AU - Reuter, Dirk AU - Wieck, A. D. AU - Bayer, M. ID - 8617 JF - Physical Review B SN - 1098-0121 TI - Temperature-induced spin-coherence dissipation in quantum dots ER - TY - JOUR AB - We study phonon-assisted electron tunneling in semiconductor quantum dot molecules. In particular, singletsinglet relaxation in a two-electron-doped structure is considered. The influence of Coulomb interaction is discussed via comparison with a single-electron system. We find that the relaxation rate reaches similar values in the two cases but the Coulomb interaction shifts the maximum rates toward larger separations between the dots. The difference in electron-phonon interaction between deformation potential and piezoelectric coupling is investigated. We show that the phonon-induced tunneling between two-electron singlet states is a fast process, taking place on the time scales of the order of a few tens of picoseconds. AU - Grodecka, A. AU - Machnikowski, P. AU - Förstner, Jens ID - 4187 IS - 8 JF - Physical Review B KW - tet_topic_qd SN - 1098-0121 TI - Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules VL - 78 ER - TY - JOUR AU - Wippermann, S. AU - Schmidt, Wolf Gero ID - 13666 IS - 23 JF - Physical Review B SN - 1098-0121 TI - Water adsorption on clean Ni(111) and p(2×2)-Ni(111)-O surfaces calculated from first principles VL - 78 ER - TY - JOUR AU - Blankenburg, S. AU - Schmidt, Wolf Gero ID - 13667 JF - Physical Review B SN - 1098-0121 TI - Spatial modulation of molecular adsorption energies due to indirect interaction VL - 78 ER - TY - JOUR AU - Rauls, E. AU - Dijkstra, S. J. AU - Schmidt, Wolf Gero ID - 13669 IS - 11 JF - Physical Review B SN - 1098-0121 TI - Atomic structure and energetics of thec-GaN(001) surface VL - 78 ER - TY - JOUR AU - Rakel, Munise AU - Cobet, Christoph AU - Esser, Norbert AU - Fuchs, Frank AU - Bechstedt, Friedhelm AU - Goldhahn, Rüdiger AU - Schmidt, Wolf Gero AU - Schaff, William ID - 13673 IS - 11 JF - Physical Review B SN - 1098-0121 TI - GaN and InN conduction-band states studied by ellipsometry VL - 77 ER - TY - JOUR AU - Schmidt, Wolf Gero AU - Albrecht, M. AU - Wippermann, S. AU - Blankenburg, S. AU - Rauls, E. AU - Fuchs, F. AU - Rödl, C. AU - Furthmüller, J. AU - Hermann, A. ID - 13676 JF - Physical Review B SN - 1098-0121 TI - LiNbO3ground- and excited-state properties from first-principles calculations VL - 77 ER - TY - JOUR AB - The emitted radiation from semiconductor nanostructures due to the excitation with intense ultrashort optical laser pulses is analyzed. Semiconductor Bloch equations that consistently describe the coupled light-field-induced interband and intraband dynamics are solved numerically. It is demonstrated that the intraband dynamics considerably influences the light emission in the regime of extreme nonlinear optics. In particular, the intraband acceleration significantly modifies the dynamics of the interband polarization which results in a strong enhancement of high-harmonic generation. AU - Golde, D. AU - Meier, Torsten AU - Koch, S. W. ID - 23483 IS - 7 JF - Physical Review B SN - 1098-0121 TI - High harmonics generated in semiconductor nanostructures by the coupled dynamics of optical inter- and intraband excitations VL - 77 ER - TY - JOUR AU - Golde, D. AU - Meier, T. AU - Koch, S. W. ID - 23484 IS - 7 JF - Physical Review B SN - 1098-0121 TI - High harmonics generated in semiconductor nanostructures by the coupled dynamics of optical inter- and intraband excitations VL - 77 ER - TY - JOUR AU - Meyrath, T. P. AU - Zentgraf, Thomas AU - Giessen, H. ID - 1756 IS - 20 JF - Physical Review B SN - 1098-0121 TI - Lorentz model for metamaterials: Optical frequency resonance circuits VL - 75 ER - TY - JOUR AU - Zentgraf, Thomas AU - Meyrath, T. P. AU - Seidel, A. AU - Kaiser, S. AU - Giessen, H. AU - Rockstuhl, C. AU - Lederer, F. ID - 1759 IS - 3 JF - Physical Review B SN - 1098-0121 TI - Babinet’s principle for optical frequency metamaterials and nanoantennas VL - 76 ER - TY - JOUR AU - Utikal, Tobias AU - Zentgraf, Thomas AU - Kuhl, Jürgen AU - Giessen, Harald ID - 1763 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Dynamics and dephasing of plasmon polaritons in metallic photonic crystal superlattices: Time- and frequency-resolved nonlinear autocorrelation measurements and simulations VL - 76 ER - TY - JOUR AU - Bryja, Leszek AU - Wójs, Arkadiusz AU - Misiewicz, Jan AU - Potemski, Marek AU - Reuter, Dirk AU - Wieck, Andreas ID - 8622 JF - Physical Review B SN - 1098-0121 TI - Magneto-optical probing of weak disorder in a two-dimensional hole gas ER - TY - JOUR AU - Scheibner, R. AU - Novik, E. G. AU - Borzenko, T. AU - König, M. AU - Reuter, Dirk AU - Wieck, A. D. AU - Buhmann, H. AU - Molenkamp, L. W. ID - 8625 JF - Physical Review B SN - 1098-0121 TI - Sequential and cotunneling behavior in the temperature-dependent thermopower of few-electron quantum dots ER - TY - JOUR AU - Yugova, I. A. AU - Greilich, A. AU - Zhukov, E. A. AU - Yakovlev, D. R. AU - Bayer, M. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8626 JF - Physical Review B SN - 1098-0121 TI - Exciton fine structure inInGaAs∕GaAsquantum dots revisited by pump-probe Faraday rotation ER - TY - JOUR AU - Greilich, A. AU - Wiemann, M. AU - Hernandez, F. G. G. AU - Yakovlev, D. R. AU - Yugova, I. A. AU - Bayer, M. AU - Shabaev, A. AU - Efros, Al. L. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8627 JF - Physical Review B SN - 1098-0121 TI - Robust manipulation of electron spin coherence in an ensemble of singly charged quantum dots ER - TY - JOUR AU - Yugova, I. A. AU - Greilich, A. AU - Yakovlev, D. R. AU - Kiselev, A. A. AU - Bayer, M. AU - Petrov, V. V. AU - Dolgikh, Yu. K. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8628 JF - Physical Review B SN - 1098-0121 TI - Universal behavior of the electrongfactor inGaAs∕AlxGa1−xAsquantum wells ER - TY - JOUR AU - Bester, G. AU - Reuter, Dirk AU - He, Lixin AU - Zunger, A. AU - Kailuweit, P. AU - Wieck, A. D. AU - Zeitler, U. AU - Maan, J. C. AU - Wibbelhoff, O. AU - Lorke, A. ID - 8631 JF - Physical Review B SN - 1098-0121 TI - Experimental imaging and atomistic modeling of electron and hole quasiparticle wave functions inInAs∕GaAsquantum dots ER - TY - JOUR AU - Schulze-Wischeler, F. AU - Zeitler, U. AU - v. Zobeltitz, C. AU - Hohls, F. AU - Reuter, Dirk AU - Wieck, A. D. AU - Frahm, H. AU - Haug, R. J. ID - 8635 JF - Physical Review B SN - 1098-0121 TI - Measurement of the specific heat of a fractional quantum Hall system ER - TY - JOUR AU - Berstermann, T. AU - Auer, T. AU - Kurtze, H. AU - Schwab, M. AU - Yakovlev, D. R. AU - Bayer, M. AU - Wiersig, J. AU - Gies, C. AU - Jahnke, F. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8636 JF - Physical Review B SN - 1098-0121 TI - Systematic study of carrier correlations in the electron-hole recombination dynamics of quantum dots ER - TY - JOUR AU - Blokland, J. H. AU - Wijnen, F. J. P. AU - Christianen, P. C. M. AU - Zeitler, U. AU - Maan, J. C. AU - Kailuweit, P. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8645 JF - Physical Review B SN - 1098-0121 TI - Hole levels in InAs self-assembled quantum dots ER - TY - JOUR AU - Thierfelder, C. AU - Schmidt, Wolf Gero ID - 13677 IS - 19 JF - Physical Review B SN - 1098-0121 TI - Ethanol adsorbed on ice: A first-principles study VL - 76 ER - TY - JOUR AU - Schmalhorst, J. AU - Thomas, A. AU - Kämmerer, S. AU - Schebaum, O. AU - Ebke, D. AU - Sacher, Marc AU - Reiss, G. AU - Hütten, A. AU - Turchanin, A. AU - Gölzhäuser, A. AU - Arenholz, E. ID - 29680 IS - 1 JF - Physical Review B KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 1098-0121 TI - Transport properties of magnetic tunnel junctions withCo2MnSielectrodes: The influence of temperature-dependent interface magnetization and electronic band structure VL - 75 ER - TY - JOUR AU - Zentgraf, Thomas AU - Christ, A. AU - Kuhl, J. AU - Gippius, N. A. AU - Tikhodeev, S. G. AU - Nau, D. AU - Giessen, H. ID - 1750 IS - 11 JF - Physical Review B SN - 1098-0121 TI - Metallodielectric photonic crystal superlattices: Influence of periodic defects on transmission properties VL - 73 ER - TY - JOUR AU - Christ, A. AU - Zentgraf, Thomas AU - Tikhodeev, S. G. AU - Gippius, N. A. AU - Kuhl, J. AU - Giessen, H. ID - 1754 IS - 15 JF - Physical Review B SN - 1098-0121 TI - Controlling the interaction between localized and delocalized surface plasmon modes: Experiment and numerical calculations VL - 74 ER - TY - JOUR AU - Ruß, M. AU - Meier, C. AU - Lorke, A. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8649 JF - Physical Review B SN - 1098-0121 TI - Role of quantum capacitance in coupled low-dimensional electron systems ER - TY - JOUR AU - Wilde, M. A. AU - Schwarz, M. P. AU - Heyn, Ch. AU - Heitmann, D. AU - Grundler, D. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8650 JF - Physical Review B SN - 1098-0121 TI - Experimental evidence of the ideal de Haas–van Alphen effect in a two-dimensional system ER - TY - JOUR AU - Greilich, A. AU - Schwab, M. AU - Berstermann, T. AU - Auer, T. AU - Oulton, R. AU - Yakovlev, D. R. AU - Bayer, M. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. ID - 8656 JF - Physical Review B SN - 1098-0121 TI - Tailored quantum dots for entangled photon pair creation ER - TY - JOUR AB - We investigate the optical properties of a Coulomb-coupled double-quantum dot system excited by coherent light pulses. Basic effects of Coulomb coupling regarding linear and nonlinear optical processes are discussed. By numerically solving the Heisenberg equation of motion we are able to present the temporal evolution of the system’s density matrix for a wide range of coupling parameters. The two main coupling effects in dipole approximation, biexcitonic shift and Förster energy transfer, are investigated and their qualitative and quantitative influence on absorption spectra, Rabi oscillations, and single- and two-pulse excitation is discussed. We present simulated differential transmission spectra to allow for comparison with recent experimental studies. AU - Danckwerts, J. AU - Ahn, K. J. AU - Förstner, Jens AU - Knorr, A. ID - 4243 IS - 16 JF - Physical Review B KW - tet_topic_qd SN - 1098-0121 TI - Theory of ultrafast nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi oscillations and pump-probe spectra VL - 73 ER - TY - JOUR AU - Schulz, S. AU - Schumacher, Stefan AU - Czycholl, G. ID - 15848 JF - Physical Review B SN - 1098-0121 TI - Tight-binding model for semiconductor quantum dots with a wurtzite crystal structure: From one-particle properties to Coulomb correlations and optical spectra ER - TY - JOUR AU - Letzig, T. AU - Willig, F. AU - Hahn, P. H. AU - Schmidt, Wolf Gero ID - 13684 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Experimental and theoretical evidence for a hydrogen stabilizedc(2×2)reconstruction of the P-rich InP(001) surface VL - 74 ER - TY - JOUR AU - Preuss, M. AU - Bechstedt, F. AU - Schmidt, Wolf Gero AU - Sochos, J. AU - Schröter, B. AU - Richter, W. ID - 13685 IS - 23 JF - Physical Review B SN - 1098-0121 TI - Clean and pyrrole-functionalized Si- and C-terminated SiC surfaces: First-principles calculations of geometry and energetics compared with LEED and XPS VL - 74 ER - TY - JOUR AU - Blankenburg, S. AU - Schmidt, Wolf Gero ID - 13688 IS - 15 JF - Physical Review B SN - 1098-0121 TI - Adsorption of phenylglycine on copper: Density functional calculations VL - 74 ER - TY - JOUR AU - Preuss, M. AU - Miotto, R. AU - Bechstedt, F. AU - Rada, T. AU - Richardson, N. V. AU - Schmidt, Wolf Gero ID - 13689 IS - 11 JF - Physical Review B SN - 1098-0121 TI - Structure, energetics, and vibrational spectra of perylene adsorbed on Si(001): First-principles calculations compared with STM and HREELS VL - 74 ER - TY - JOUR AU - Thierfelder, C. AU - Hermann, A. AU - Schwerdtfeger, P. AU - Schmidt, Wolf Gero ID - 13690 IS - 4 JF - Physical Review B SN - 1098-0121 TI - Strongly bonded water monomers on the ice Ih basal plane: Density-functional calculations VL - 74 ER - TY - JOUR AU - Biering, S. AU - Hermann, A. AU - Schmidt, Wolf Gero ID - 13691 IS - 23 JF - Physical Review B SN - 1098-0121 TI - Adsorption of water on chlorine-terminated Si(111) from first principles: Substrate-induced ordering versus intermolecular interactions VL - 73 ER - TY - JOUR AU - Seino, K. AU - Schmidt, Wolf Gero AU - Ohtake, A. ID - 13694 IS - 3 JF - Physical Review B SN - 1098-0121 TI - Ga-richGaAs(001)surface fromab initiocalculations: Atomic structure of the(4×6)and(6×6)reconstructions VL - 73 ER - TY - JOUR AU - Hahn, P. H. AU - Schmidt, Wolf Gero AU - Bechstedt, F. ID - 13695 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Molecular electronic excitations calculated from a solid-state approach: Methodology and numerics VL - 72 ER - TY - JOUR AU - Ortmann, F. AU - Bechstedt, F. AU - Schmidt, Wolf Gero ID - 13845 IS - 20 JF - Physical Review B SN - 1098-0121 TI - Semiempirical van der Waals correction to the density functional description of solids and molecular structures VL - 73 ER - TY - JOUR AU - Höink, V. AU - Sacher, Marc AU - Schmalhorst, J. AU - Reiss, G. AU - Engel, D. AU - Weis, T. AU - Ehresmann, A. ID - 29685 IS - 22 JF - Physical Review B KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 1098-0121 TI - Thermal stability of magnetic nanostructures in ion-bombardment-modified exchange-bias systems VL - 73 ER - TY - JOUR AB - The coherent ultrafast optical injection and the temporal evolution of charge and spin currents in semiconductors is analyzed using a microscopic many-body theory. The approach is based on the semiconductor Bloch equations and includes light-field-induced intraband and interband excitations, excitonic effects, and carrier–LO-phonon and carrier-carrier scattering processes. The relaxation effects are treated both in the second Born-Markov approximation and on the level of quantum kinetic theory including memory effects. The dynamics of the charge and spin currents is evaluated numerically for a one-dimensional model system. The dependence of the currents and their decay on the temperature, the excitation intensities, and the frequencies of the incident light fields is discussed. Whereas the overall decay dynamics is described well within the Markov approximation, the quantum kinetic theory predicts additional oscillatory signatures in the current transients. AU - Duc, H. T. AU - Vu, Q. T. AU - Meier, Torsten AU - Haug, H. AU - Koch, S. W. ID - 23492 IS - 16 JF - Physical Review B SN - 1098-0121 TI - Temporal decay of coherently optically injected charge and spin currents due to carrier–LO-phonon and carrier-carrier scattering VL - 74 ER - TY - JOUR AU - Borri, P. AU - Langbein, W. AU - Woggon, U. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8681 JF - Physical Review B SN - 1098-0121 TI - Exciton dephasing via phonon interactions in InAs quantum dots: Dependence on quantum confinement ER - TY - JOUR AU - Pfalz, S. AU - Winkler, R. AU - Nowitzki, T. AU - Reuter, Dirk AU - Wieck, A. D. AU - Hägele, D. AU - Oestreich, M. ID - 8682 JF - Physical Review B SN - 1098-0121 TI - Optical orientation of electron spins in GaAs quantum wells ER - TY - JOUR AB - The interaction of electrons with LO phonons provides an important mechanism of optical dephasing and carrier scattering for the two-dimensional electron gas in semiconductor quantum wells. In this paper, the corresponding ultrafast nonlinearities for off-resonant and resonant intersubband excitations are investigated. Quantum kinetic effects of the electron-phonon interaction and the corresponding violation of the microscopic energy conservation yield a qualitative different picture compared to the standard Markovian theory, if the phonon energy is larger than the intersubband-gap energy. AU - Butscher, Stefan AU - Förstner, Jens AU - Waldmüller, Inès AU - Knorr, Andreas ID - 4249 IS - 4 JF - Physical Review B KW - tet_topic_qw SN - 1098-0121 TI - Ultrafast electron-phonon interaction of intersubband transitions: Quantum kinetics from adiabatic following to Rabi-oscillations VL - 72 ER - TY - JOUR AB - A microscopic description based on the density matrix formalism is developed to describe the dynamics of photoemission of hot electrons at semiconductor surfaces, including the interaction of bulk and surface states. The equations of motion for the electronic occupations and transitions include the interaction with arbitrary optical fields as well as the electron-phonon coupling. Model wave functions are used to qualitatively describe the bulk-surface dynamics and the subsequent time resolved two-photon photoemission s2PPEd spectra. Our results suggest that it is possible to extract energetic and temporal information of the underlying dynamical occupations of the intermediate states from the 2PPE spectra. AU - Zeiser, A. AU - Bücking, N. AU - Förstner, Jens AU - Knorr, A. ID - 4254 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Microscopic theory of electron dynamics and time-resolved two-color two-photon photoemission at semiconductor surfaces VL - 71 ER - TY - JOUR AB - Using a fully quantized description of strongly confined electrons interacting with acoustic phonons and the photon field, the nonstationary resonance-fluorescence spectra of a semiconductor quantum dot are investigated. For excitation pulses with durations approaching typical electron-phonon scattering times, the virtual quantum processes yield an observable electron-phonon sideband broadening. AU - Ahn, K. J. AU - Förstner, Jens AU - Knorr, A. ID - 4260 IS - 15 JF - Physical Review B KW - tet_topic_qd SN - 1098-0121 TI - Resonance fluorescence of semiconductor quantum dots: Signatures of the electron-phonon interaction VL - 71 ER - TY - JOUR AU - Schumacher, Stefan AU - Czycholl, G. AU - Jahnke, F. AU - Kudyk, I. AU - Rückmann, H. I. AU - Gutowski, J. AU - Gust, A. AU - Alexe, G. AU - Hommel, D. ID - 15849 JF - Physical Review B SN - 1098-0121 TI - Polariton propagation in shallow-confinement heterostructures: Microscopic theory and experiment showing the breakdown of the dead-layer concept ER - TY - JOUR AU - Schumacher, Stefan AU - Czycholl, G. AU - Jahnke, F. AU - Kudyk, I. AU - Wischmeier, L. AU - Rückmann, I. AU - Voss, T. AU - Gutowski, J. AU - Gust, A. AU - Hommel, D. ID - 15850 JF - Physical Review B SN - 1098-0121 TI - Coherent propagation of polaritons in semiconductor heterostructures: Nonlinear pulse transmission in theory and experiment ER - TY - JOUR AU - Bechstedt, F. AU - Seino, K. AU - Hahn, P. H. AU - Schmidt, Wolf Gero ID - 13696 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Quasiparticle bands and optical spectra of highly ionic crystals: AlN and NaCl VL - 72 ER - TY - JOUR AU - Fuchs, F. AU - Schmidt, Wolf Gero AU - Bechstedt, F. ID - 13702 IS - 7 JF - Physical Review B SN - 1098-0121 TI - Understanding the optical anisotropy of oxidized Si(001) surfaces VL - 72 ER - TY - JOUR AU - Leitsmann, R. AU - Schmidt, Wolf Gero AU - Hahn, P. H. AU - Bechstedt, F. ID - 13705 JF - Physical Review B SN - 1098-0121 TI - Second-harmonic polarizability including electron-hole attraction from band-structure theory VL - 71 ER - TY - JOUR AU - Hermann, A. AU - Schmidt, Wolf Gero AU - Bechstedt, F. ID - 13706 JF - Physical Review B SN - 1098-0121 TI - Optical response ofπ-conjugated molecular monolayer adsorbed on the semiconductor Si(001) surface: A first-principles study VL - 71 ER - TY - JOUR AU - Hahn, P. H. AU - Schmidt, Wolf Gero AU - Bechstedt, F. ID - 13846 IS - 24 JF - Physical Review B SN - 1098-0121 TI - Molecular electronic excitations calculated from a solid-state approach: Methodology and numerics VL - 72 ER - TY - JOUR AB - Significant aspects of the light–matter interaction can be strongly modified in suitably designed systems consisting of semiconductor nanostructures and dielectric photonic crystals. To analyze such effects, a microscopic theory is presented, which is capable of describing the optoelectronic properties of such hybrid systems via a self-consistent solution of the dynamics of the optical field and the photoexcitations of the material. The theory is applied to investigate the local excitonic resonances, which arise as a consequence of the modified Coulomb interaction in the vicinity of a structured dielectric medium. The excitation of a coherent superposition of the spatially inhomogeneous optical transitions induces an intricate wave packet dynamics. In the presence of dephasing and relaxation processes, the coherent oscillations are damped and the photoexcited carriers relax into spatially inhomogeneous quasi-equilibrium distributions. AU - Pasenow, B. AU - Reichelt, Matthias AU - Stroucken, T. AU - Meier, Torsten AU - Koch, S. W. ID - 23502 IS - 19 JF - Physical Review B SN - 1098-0121 TI - Excitonic wave packet dynamics in semiconductor photonic-crystal structures VL - 71 ER - TY - JOUR AU - Oszwałdowski, R. AU - Reichelt, Matthias AU - Meier, Torsten AU - Koch, S. W. AU - Rohlfing, Michael ID - 23503 IS - 23 JF - Physical Review B SN - 1098-0121 TI - Nonlinear optical response of the Si ( 111 ) − ( 2 × 1 ) surface exciton: Influence of biexciton many-body correlations VL - 71 ER - TY - JOUR AB - A set of (Ga0.77In0.23)As/Ga(NxAs1−x) heterostructures is studied by time-resolved photoluminescence. Four samples with nitrogen concentrations from x=0.48% up to x=2.2% are investigated at different temperatures and with different excitation densities. The experiments suggest that the heterostructure band offset is type I for x=0.48% and type II for x=2.2%. The situation is more complex for x=0.72% and x=1.25%, since these samples are close to the transition from type I to type II. The experimental findings are analyzed using a detailed microscopic theory. Numerical calculations describe the measured data well. In particular, the interpretation of the experimental results concerning the band alignment is confirmed by the theoretical analysis. AU - Hantke, K. AU - Heber, J. D. AU - Schlichenmaier, C. AU - Thränhardt, A. AU - Meier, Torsten AU - Kunert, B. AU - Volz, K. AU - Stolz, W. AU - Koch, S. W. AU - Rühle, W. W. ID - 23501 IS - 16 JF - Physical Review B SN - 1098-0121 TI - Time-resolved photoluminescence of type-I and type-II (GaIn) As/Ga (NAs) heterostructures VL - 71 ER - TY - JOUR AB - The optical and electronic properties of semiconductor heterostructures in the vicinity of photonic crystals are discussed. The theoretical approach provides a self-consistent solution of the dynamics of the electromagnetic field and the material excitations. Due to the influence of the structured dielectric environment on the Coulomb interaction, the exciton resonances and the quasiequilibrium carrier densities in the spatially homogeneous semiconductor become space dependent. It is demonstrated that these inhomogeneities lead to distinct modifications of the optical absorption and gain spectra. As an application, numerically calculated density-dependent optical spectra are analyzed for an array of semiconductor quantum wires which are close to a two-dimensional photonic crystal. The spatial inhomogeneities result in novel excitonic absorption features and modification of the optical gain in these structures. AU - Reichelt, Matthias AU - Pasenow, B. AU - Meier, Torsten AU - Stroucken, T. AU - Koch, S. W. ID - 23496 IS - 3 JF - Physical Review B SN - 1098-0121 TI - Spatially inhomogeneous optical gain in semiconductor photonic-crystal structures VL - 71 ER - TY - JOUR AU - Christ, A. AU - Zentgraf, Thomas AU - Kuhl, J. AU - Tikhodeev, S. G. AU - Gippius, N. A. AU - Giessen, H. ID - 1746 IS - 12 JF - Physical Review B SN - 1098-0121 TI - Optical properties of planar metallic photonic crystal structures: Experiment and theory VL - 70 ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8704 JF - Physical Review B SN - 1098-0121 TI - Control of fine-structure splitting and biexciton binding inInxGa1−xAsquantum dots by annealing ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. ID - 8709 JF - Physical Review B SN - 1098-0121 TI - Radiatively limited dephasing in InAs quantum dots ER - TY - JOUR AU - Deviatov, E. V. AU - Würtz, A. AU - Lorke, A. AU - Yu. Melnikov, M. AU - Dolgopolov, V. T. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8710 JF - Physical Review B SN - 1098-0121 TI - Two relaxation mechanisms observed in transport between spin-split edge states at high imbalance ER - TY - JOUR AB - The adiabatic driving of the resonant electron dynamics in a one-dimensional resonant photonic band gap is proposed as an optical mechanism for nonlinear ultrafast switching. Pulsed excitation inside the photonic gap results in an ultrafast suppression and recovery of the gap. This behavior results from the adiabatic carrier dynamics due to rapid radiative damping inside the band gap. AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Prineas, John P. AU - Nielsen, Nils C. AU - Kuhl, Jürgen AU - Khitrova, Galina AU - Gibbs, Hyatt M. AU - Giessen, Harald AU - Koch, Stephan W. ID - 4270 IS - 23 JF - Physical Review B KW - tet_topic_qw SN - 1098-0121 TI - Adiabatically driven electron dynamics in a resonant photonic band gap: Optical switching of a Bragg periodic semiconductor VL - 70 ER - TY - JOUR AB - We investigate the temporal and spectral properties of subpicosecond pulses transmitted on the heavy-hole exciton transition through a multiple-quantum-well Bragg structure, exhibiting a one-dimensional photonic band gap. At low light intensities, a temporal propagation beating is observed. This beating is strongly dependent on the optical dephasing time T2 which is dominated by the radiative interwell coupling. In an intermediate intensity regime, the Pauli-blocking nonlinearity leads to gradual suppression of the photonic band gap and vanishing of the linear propagation beating. For highly nonlinear excitation, we find signatures of selfinduced transmission due to Rabi flopping and adiabatic following of the carrier density. Numerical simulations using the semiconductor Maxwell-Bloch equations are in excellent agreement with the experimental data up to intensities for which higher many-particle correlations become more important and self-phase modulation occurs in the sample substrate. AU - Nielsen, N. C. AU - Kuhl, J. AU - Schaarschmidt, M. AU - Förstner, Jens AU - Knorr, A. AU - Koch, S. W. AU - Khitrova, G. AU - Gibbs, H. M. AU - Giessen, H. ID - 4277 IS - 7 JF - Physical Review B KW - tet_topic_qw SN - 1098-0121 TI - Linear and nonlinear pulse propagation in a multiple-quantum-well photonic crystal VL - 70 ER - TY - JOUR AU - Waldmüller, I. AU - Förstner, Jens AU - Lee, S.-C. AU - Knorr, A. AU - Woerner, M. AU - Reimann, K. AU - Kaindl, R. A. AU - Elsaesser, T. AU - Hey, R. AU - Ploog, K. H. ID - 673 IS - 20 JF - Physical Review B SN - 1098-0121 TI - Optical dephasing of coherent intersubband transitions in a quasi-two-dimensional electron gas VL - 69 ER - TY - JOUR AU - Seino, K. AU - Schmidt, Wolf Gero AU - Bechstedt, F. ID - 13719 JF - Physical Review B SN - 1098-0121 TI - Organic modification of surface electronic properties: A first-principles study of uracil on Si(001) VL - 69 ER - TY - JOUR AU - Schmalhorst, J. AU - Sacher, Marc AU - Höink, V. AU - Reiss, G. AU - Engel, D. AU - Ehresmann, A. ID - 29693 IS - 18 JF - Physical Review B KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 1098-0121 TI - X-ray absorption and magnetic circular dichroism studies of ion-bombarded ferromagnet-antiferromagnet bilayers VL - 70 ER - TY - JOUR AU - Schmalhorst, J. AU - Kämmerer, S. AU - Sacher, Marc AU - Reiss, G. AU - Hütten, A. AU - Scholl, A. ID - 29695 IS - 2 JF - Physical Review B KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 1098-0121 TI - Interface structure and magnetism of magnetic tunnel junctions with aCo2MnSielectrode VL - 70 ER -