@article{8668, author = {{Reuter, Dirk and Kailuweit, P. and Roescu, R. and Wieck, A. D. and Wibbelhoff, O. S. and Lorke, A. and Zeitler, U. and Maan, J. C.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, pages = {{3942--3945}}, title = {{{Hole and electron wave functions in self-assembled InAs quantum dots: a comparison}}}, doi = {{10.1002/pssb.200671520}}, year = {{2006}}, } @article{8669, author = {{Oulton, R. and Verbin, S. Yu. and Auer, T. and Cherbunin, R. V. and Greilich, A. and Yakovlev, D. R. and Bayer, M. and Reuter, Dirk and Wieck, A.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, pages = {{3922--3927}}, title = {{{Sub-second electron spin lifetimes in quantum dots at zero applied magnetic field due to alignment of QD nuclei}}}, doi = {{10.1002/pssb.200671529}}, year = {{2006}}, } @article{8670, author = {{Mallet, F. and Ericsson, J. and Mailly, D. and Ünlübayir, S. and Reuter, Dirk and Melnikov, A. and Wieck, A. D. and Micklitz, T. and Rosch, A. and Costi, T. A. and Saminadayar, L. and Bäuerle, C.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, title = {{{Scaling of the Low-Temperature Dephasing Rate in Kondo Systems}}}, doi = {{10.1103/physrevlett.97.226804}}, year = {{2006}}, } @article{8671, author = {{Hohage, P. E. and Bacher, G. and Reuter, Dirk and Wieck, A. D.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, title = {{{Coherent spin oscillations in bulk GaAs at room temperature}}}, doi = {{10.1063/1.2398909}}, year = {{2006}}, } @article{8672, author = {{Bominaar-Silkens, I M A and Schaapman, M R and Zeitler, U and Christianen, P C M and Maan, J C and Reuter, Dirk and Wieck, A D and Schuh, D and Bichler, M}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, pages = {{315--315}}, title = {{{Magnetization of bilayer two-dimensional electron systems}}}, doi = {{10.1088/1367-2630/8/12/315}}, year = {{2006}}, } @article{8673, author = {{Greilich, A. and Oulton, R. and Zhukov, E. A. and Yugova, I. A. and Yakovlev, D. R. and Bayer, M. and Shabaev, A. and Efros, Al. L. and Merkulov, I. A. and Stavarache, V. and Reuter, Dirk and Wieck, A.}}, issn = {{1610-1634}}, journal = {{physica status solidi (c)}}, pages = {{3740--3743}}, title = {{{Electron spin coherence in singly charged (In,Ga)As/GaAs quantum dots}}}, doi = {{10.1002/pssc.200671524}}, year = {{2006}}, } @article{48999, abstract = {{The fast dephasing of electron spins in an ensemble of quantum dots is detrimental for applications in quantum information processing. We show here that dephasing can be overcome by using a periodic train of light pulses to synchronize the phases of the precessing spins, and we demonstrate this effect in an ensemble of singly charged (In,Ga)As/GaAs quantum dots. This mode locking leads to constructive interference of contributions to Faraday rotation and presents potential applications based on robust quantum coherence within an ensemble of dots.}}, author = {{Greilich, A. and Yakovlev, D. R. and Shabaev, A. and Efros, Al. L. and Yugova, I. A. and Oulton, R. and Stavarache, V. and Reuter, Dirk and Wieck, A. and Bayer, M.}}, issn = {{0036-8075}}, journal = {{Science}}, keywords = {{Multidisciplinary}}, number = {{5785}}, pages = {{341--345}}, publisher = {{American Association for the Advancement of Science (AAAS)}}, title = {{{Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots}}}, doi = {{10.1126/science.1128215}}, volume = {{313}}, year = {{2006}}, } @article{29685, author = {{Höink, V. and Sacher, Marc and Schmalhorst, J. and Reiss, G. and Engel, D. and Weis, T. and Ehresmann, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}}, number = {{22}}, publisher = {{American Physical Society (APS)}}, title = {{{Thermal stability of magnetic nanostructures in ion-bombardment-modified exchange-bias systems}}}, doi = {{10.1103/physrevb.73.224428}}, volume = {{73}}, year = {{2006}}, } @article{29684, author = {{Thomas, Andy and Meyners, Dirk and Ebke, Daniel and Liu, Ning-Ning and Sacher, Marc and Schmalhorst, Jan and Reiss, Günter and Ebert, Hubert and Hütten, Andreas}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{1}}, publisher = {{AIP Publishing}}, title = {{{Inverted spin polarization of Heusler alloys for spintronic devices}}}, doi = {{10.1063/1.2219333}}, volume = {{89}}, year = {{2006}}, } @article{29686, author = {{Ehresmann, A. and Engel, D. and Weis, T. and Schindler, A. and Junk, D. and Schmalhorst, J. and Höink, V. and Sacher, Marc and Reiss, G.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}}, number = {{1}}, pages = {{29--36}}, publisher = {{Wiley}}, title = {{{Fundamentals for magnetic patterning by ion bombardment of exchange bias layer systems}}}, doi = {{10.1002/pssb.200562442}}, volume = {{243}}, year = {{2006}}, } @article{29681, author = {{Schmalhorst, J. and Sacher, Marc and Höink, V. and Reiss, G. and Hütten, A. and Engel, D. and Ehresmann, A.}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, keywords = {{General Physics and Astronomy}}, number = {{11}}, publisher = {{AIP Publishing}}, title = {{{Magnetic and chemical properties of Co[sub 2]MnSi thin films compared to the Co[sub 2]MnSi∕Al-O interface}}}, doi = {{10.1063/1.2384806}}, volume = {{100}}, year = {{2006}}, } @article{29683, author = {{Höink, V. and Sacher, Marc and Schmalhorst, J. and Reiss, G. and Engel, D. and Weis, T. and Ehresmann, A.}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, keywords = {{General Physics and Astronomy}}, number = {{6}}, publisher = {{AIP Publishing}}, title = {{{Switchable resonant x-ray Bragg scattering on a magnetic grating patterned by ion bombardment}}}, doi = {{10.1063/1.2349568}}, volume = {{100}}, year = {{2006}}, } @article{29682, author = {{Hütten, A. and Schmalhorst, J. and Thomas, A. and Kämmerer, S. and Sacher, Marc and Ebke, D. and Liu, N.-N. and Kou, X. and Reiss, G.}}, issn = {{0925-8388}}, journal = {{Journal of Alloys and Compounds}}, keywords = {{Materials Chemistry, Metals and Alloys, Mechanical Engineering, Mechanics of Materials}}, number = {{1-2}}, pages = {{148--152}}, publisher = {{Elsevier BV}}, title = {{{Spin-electronic devices with half-metallic Heusler alloys}}}, doi = {{10.1016/j.jallcom.2005.12.106}}, volume = {{423}}, year = {{2006}}, } @inbook{43269, abstract = {{The derivation of a microscopic many-body theory for the nonlinear optical response of semiconductors is reviewed. At the Hartree–Fock level, the semiconductor Bloch equations include many-body effects via band gap and field renormalization. These equations are sufficient to describe excitonic resonances as they appear already in the linear absorption spectra. An adequate description of nonlinear optical effects in semiconductors beyond the Hartree–Fock level includes Coulomb interaction induced carrier correlations. Different schemes have been developed to treat such correlation effects. As two examples, the second-order Born approximation and the dynamics-controlled truncation scheme are introduced and analyzed. In addition to the derivation of the equations of motion, a few examples are presented which highlight important signatures of many-body correlations in the optical response of semiconductors.}}, author = {{Meier, Torsten and Koch, S.W.}}, booktitle = {{Quantum Coherence: From Quarks to Solids}}, isbn = {{978-3-540-30085-4}}, pages = {{115--152}}, publisher = {{Springer, Berlin, Heidelberg}}, title = {{{Microscopic Theory of Coherent Semiconductor Optics}}}, doi = {{10.1007/11398448_4}}, volume = {{689}}, year = {{2006}}, } @article{23493, abstract = {{A microscopic analysis is presented for the extreme nonlinear optical response of semiconductor quantum wells and wires after intense excitation with femtosecond laser pulses. In this regime, the light–matter interaction is the dominant eneregy scale, leading to a number of interesting effects such as carrier-wave Rabi flopping, Mollow splitting, and the creation of higher harmonics. The results presented here were obtained by evaluating the semiconductor Bloch equations without the rotating wave approximation. The electronic dispersion of semiconductor nanostructures is shown to have a characteristic influence on the extreme nonlinear optical response, whereas the relative importance of the carrier Coulomb interaction decreases with increasing excitation intensities.}}, author = {{Golde, Daniel and Meier, Torsten and Koch, Stephan W.}}, issn = {{0740-3224}}, journal = {{Journal of the Optical Society of America B}}, number = {{12}}, pages = {{2559--2565}}, title = {{{Microscopic analysis of extreme nonlinear optics in semiconductor nanostructures}}}, doi = {{10.1364/josab.23.002559}}, volume = {{23}}, year = {{2006}}, } @article{23495, abstract = {{The method of angular photonic correlations of spontaneous emission is introduced as an experimental, purely optical scheme to characterize disorder in semiconductor nanostructures. The theoretical expression for the angular correlations is derived and numerically evaluated for a model system. The results demonstrate how the proposed experimental method yields direct information about the spatial distribution of the relevant states and thus on the disorder present in the system.}}, author = {{Bozsoki, P. and Thomas, P. and Kira, M. and Hoyer, W. and Meier, Torsten and Koch, S. W. and Maschke, K. and Varga, I. and Stolz, H.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{22}}, title = {{{Characterization of Disorder in Semiconductors via Single-Photon Interferometry}}}, doi = {{10.1103/physrevlett.97.227402}}, volume = {{97}}, year = {{2006}}, } @inproceedings{43265, abstract = {{The dynamics of charge and spin currents generated by two-color femtosecond laser pulses is investigated. Non-Markovian memory effects lead to oscillations in the coherent transients. Consequences arising from the heavy-hole light-hole coupling are predicted.}}, author = {{Meier, Torsten and Vu, Q.T. and Duc, H.T. and Pasenow, B. and Haug, H. and Koch, S.W.}}, booktitle = {{International Conference on Ultrafast Phenomena XV}}, isbn = {{1-55752-810-1}}, location = {{Pacific Grove, California United States}}, publisher = {{Optical Society of America}}, title = {{{Microscopic Many-Body Analysis of Ultrafast Photocurrents in Semiconductor Nanostructures}}}, doi = {{10.1364/UP.2006.TuD8}}, volume = {{88}}, year = {{2006}}, } @article{23491, abstract = {{A brief overview of a consistent microscopic approach to model the optical and electronic properties of semiconductor nanostructures is presented. Coupled semiconductor Bloch and Maxwell equations are used to investigate the performance of semiconductor microcavity structures, photonic band gap systems, and lasers. The predictive potential of the microscopic theory is demonstrated for several examples of practical importance. Optical gain and output characteristics are computed for modern vertical external cavity surface emitting laser structures. It is shown how design flexibilities can be used to optimize the device performance. Nanostructures are proposed where semiconductor quantum wells are embedded in one-dimensional photonic crystals. For field modes spectrally below the photonic band edge it is shown that the optical gain and absorption can be enhanced by more than one order of magnitude over the value of the homogeneous medium. The increased gain can be used for laser action by placing quantum wells and a suitably designed photonic crystal structure inside a microcavity.}}, author = {{Thränhardt, A. and Meier, Torsten and Reichelt, Matthias and Schlichenmaier, C. and Pasenow, B. and Kuznetsova, I. and Becker, S. and Stroucken, T. and Hader, J. and Zakharian, A.R. and Moloney, J.V. and Chow, W.W. and Koch, S.W.}}, issn = {{0022-3093}}, journal = {{Journal of Non-Crystalline Solids}}, number = {{23-25}}, pages = {{2480--2483}}, title = {{{Microscopic modeling of the optical properties of semiconductor nanostructures}}}, doi = {{10.1016/j.jnoncrysol.2006.02.064}}, volume = {{352}}, year = {{2006}}, } @article{23492, abstract = {{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.}}, author = {{Duc, H. T. and Vu, Q. T. and Meier, Torsten and Haug, H. and Koch, S. W.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{16}}, title = {{{Temporal decay of coherently optically injected charge and spin currents due to carrier–LO-phonon and carrier-carrier scattering}}}, doi = {{10.1103/physrevb.74.165328}}, volume = {{74}}, year = {{2006}}, } @inbook{44120, author = {{Meier, Torsten and Koch, S.W.}}, booktitle = {{Photonic Crystals: Advances in Design, Fabrication, and Characterization}}, editor = {{Busch, Kurt and Lölkes, Stefan and Wehrspohn, Ralf B. and Föll, Helmut}}, pages = {{43--62}}, publisher = {{John Wiley & Sons}}, title = {{{Semiconductor Optics in Photonic Crystal Structures}}}, year = {{2006}}, }