TY - JOUR AU - Rose, Hendrik AU - Vasil'ev, A. N. AU - Tikhonova, O. V. AU - Meier, Torsten AU - Sharapova, Polina ID - 37280 IS - 1 JF - Physical Review A SN - 2469-9926 TI - Quantum-optical excitations of semiconductor nanostructures in a microcavity using a two-band model and a single-mode quantum field VL - 107 ER - TY - CONF AB - The nonlinear optical response of quantum well excitons is investigated experimentally using polarization resolved four wave mixing, optical-pump optical-probe, and optical-pump Terahertz-probe spectroscopy. The four-wave mixing data reveal clear signatures of coherent biexcitons which concur with straight-forward polarization selection rules at the Γ point. The type-I samples show the well-established time-domain beating signatures in the transients as well as the corresponding spectral signatures clearly. The latter are also present in type-II samples; however, the smaller exciton and biexciton binding energies in these structures infer longer beating times which, in turn, are accompanied by faster dephasing of the type-II exciton coherences. Furthermore, the THz absorption following spectrally narrow, picosecond excitation at energies in the vicinity of the 1s exciton resonance are discussed. Here, the optical signatures yield the well-established redshifts and blueshifts for the appropriate polarization geometries in type-I quantum well samples also termed “AC Stark Effect”. The THz probe reveals intriguing spectral features which can be ascribed to coherent negative absorption following an excitation into a virtual state for an excitation below the 1s exciton resonance. Furthermore, the scattering and ionization of excitons is discussed for several excitation geometries yielding control rules for elastic and inelastic quasiparticle collisions. AU - Meier, Torsten AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Littmann, J. H. AU - Fey, M. AU - Trautmann, Alexander AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Fuchs, C. AU - Volz, K. AU - Chatterjee, S. ID - 43189 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields VL - 12419 ER - TY - CONF AB - Anomalous currents refer to electronic currents that flow perpendicularly to the direction of the accelerating electric field. Such anomalous currents can be generated when Terahertz fields are applied after an optical interband excitation of GaAs quantum wells. The underlying processes are investigated by numerical solutions of the semiconductor Bloch equations in the length gauge. Excitonic effects are included by treating the manybody Coulomb interaction in time-dependent Hartree-Fock approximation and additionally also carrier-phonon scattering processes are considered. The band structure and matrix elements are obtained from a 14-band k · p model within the envelope function approximation. The random phase factors of the matrix elements that appear due to the separate numerical diagonalization at each k-point are treated by applying a smooth gauge transformation. We present the macroscopic Berry curvature and anomalous current transients with and without excitonic effects. It is demonstrated that the resonant optical excitation of excitonic resonances can significantly enhance the Berry curvature and the anomalous currents. AU - Meier, Torsten AU - Ngo, C. AU - Priyadarshi, S. AU - Duc, H. T. AU - Bieler, M. ID - 43191 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells VL - 12419 ER - TY - CONF AB - The nonlinear optical response of quantum well excitons excited by optical fields is analyzed by numerical solutions of the semiconductor Bloch equations. Differential absorption spectra are computed for resonant pumping at the exciton resonance and the dependence of the absorption changes on the polarization directions of the pump and probe pulses is investigated. Coherent biexcitonic many-body correlations are included in our approach up to third-order in the optical fields. Results are presented for spatially-direct type-I and spatiallyindirect type-II quantum well systems. Due to the spatial inhomogeneity, in type-II structures a finite coupling between excitons of opposite spins exists already on the Hartree-Fock level and contributes to the absorption changes for the case of opposite circularly polarized pump and probe pulses. AU - Meier, Torsten AU - Trautmann, Alexander AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Chatterjee, S. ID - 43190 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations VL - 12419 ER - TY - JOUR AU - Meier, Torsten AU - Schäfer, F. AU - Stein, M. AU - Lorenz, J. AU - Dobener, F. AU - Ngo, C. AU - Steiner, J. T. AU - Fuchs, C. AU - Stolz, W. AU - Volz, K. AU - Hader, J. AU - Moloney, J.V. AU - Koch, S.W. AU - Chatterjee, S. ID - 43139 IS - 8 JF - Applied Physics Letters TI - Gain recovery dynamics in active type-II semiconductor heterostructures VL - 122 ER - TY - GEN AU - Meier, Torsten AU - Grisard, S. AU - Trifonov, A.V. AU - Rose, Hendrik AU - Reichhardt, R. AU - Reichelt, Matthias AU - Schneider, C. AU - Kamp, M. AU - Höfling, S. AU - Bayer, M. AU - Akimov, I.A ID - 43132 T2 - arxiv:2302.02480 TI - Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots ER - TY - CONF AB - The nonlinear optical response of an ensemble of semiconductor quantum dots is analyzed by wave-mixing processes, where we focus on four-wave mixing with two incident pulses. Wave-mixing experiments are often described with semiclassical models, where the light is modeled classically and the material quantum mechanically. Here, however, we use a fully quantized model, where the light is given by a quantum state of light. Quantum light involves more degrees of freedom than classical light as e.g., its photon statistics and quantum correlations, which is a promising resource for quantum devices, such as quantum memories. The light-matter interaction is treated with a Jaynes-Cummings type model and the quantum field is given by a single mode since the quantum dots are embedded in a microcavity. We present numerical simulations of the four-wave-mixing response of a homogeneous system for pulse sequences and find a significant dependence of the result on the photon statistics of the incident pulses. The model constitutes a problem with a large state space which arises from the frequency distribution of the transition energies of the inhomogeneously broadened quantum dot ensemble that is coupled with a quantum light mode. Here we approximate the dynamics by summing over individual quantum dot-microcavity systems. Photon echoes arising from the excitation with different quantum states of light are simulated and compared. AU - Rose, Hendrik AU - Grisard, S. AU - Trifonov, A. V. AU - Reichhardt, R. AU - Reichelt, Matthias AU - Bayer, M. AU - Akimov, I. A. AU - Meier, Torsten ID - 43192 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Theoretical analysis of four-wave mixing on semiconductor quantum dot ensembles with quantum light VL - 12419 ER - TY - JOUR AB - Since high-order harmonic generation (HHG) from atoms depends sensitively on the polarization of the driving laser field, the polarization gating (PG) technique was developed and applied successfully to generate isolated attosecond pulses from atomic gases. The situation is, however, different in solid-state systems as it has been demonstrated that due to collisions with neighboring atomic cores of the crystal lattice strong HHG can be generated even by elliptically- and circularly-polarized laser fields. Here we apply PG to solid-state systems and find that the conventional PG technique is inefficient for the generation of isolated ultrashort harmonic pulse bursts. In contrast, we demonstrate that a polarization-skewed laser pulse is able to confine the harmonic emission to a time window of less than one-tenth of the laser cycle. This method provides a novel way to control HHG and to generate isolated attosecond pulses in solids. AU - Song, Xiaohong AU - Yang, Shidong AU - Wang, Guifang AU - Lin, Jianpeng AU - Wang, Liang AU - Meier, Torsten AU - Yang, Weifeng ID - 45704 IS - 12 JF - Optics Express KW - Atomic and Molecular Physics KW - and Optics SN - 1094-4087 TI - Control of the electron dynamics in solid-state high harmonic generation on ultrafast time scales by a polarization-skewed laser pulse VL - 31 ER - TY - JOUR AU - Zuo, Ruixin AU - Song, Xiaohong AU - Ben, Shuai AU - Meier, Torsten AU - Yang, Weifeng ID - 45703 IS - 2 JF - Physical Review Research KW - General Physics and Astronomy SN - 2643-1564 TI - Revealing the nonadiabatic tunneling dynamics in solid-state high harmonic generation VL - 5 ER - TY - JOUR AU - Belobo, D. Belobo AU - Meier, Torsten ID - 45709 JF - Results in Physics KW - General Physics and Astronomy SN - 2211-3797 TI - Manipulation of nonautonomous nonlinear wave solutions of the generalized coupled Gross–Pitaevskii equations with spin–orbit interaction and weak Raman couplings ER - TY - JOUR AU - Ali, Usman AU - Holthaus, Martin AU - Meier, Torsten ID - 49059 IS - 4 JF - Physical Review Research KW - General Physics and Astronomy SN - 2643-1564 TI - Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice VL - 5 ER - TY - JOUR AU - Ali, Usman AU - Holthaus, Martin AU - Meier, Torsten ID - 52122 IS - 4 JF - Physical Review Research KW - General Physics and Astronomy SN - 2643-1564 TI - Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice VL - 5 ER - TY - DATA AU - Meier, Torsten ID - 52124 TI - Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice ER - TY - JOUR AB - Abstract The interaction between quantum light and matter is being intensively studied for systems that are enclosed in high-Q cavities which strongly enhance the light–matter coupling. Cavities with low Q-factors are generally given less attention due to their high losses that quickly destroy quantum systems. However, bad cavities can be utilized for several applications, where lower Q-factors are required, e.g., to increase the spectral width of the cavity mode. In this work, we demonstrate that low-Q cavities can be beneficial for preparing specific electronic steady states when certain quantum states of light are applied. We investigate the interaction between quantum light with various statistics and matter represented by a Λ-type three-level system in lossy cavities, assuming that cavity losses are the dominant loss mechanism. We show that cavity losses lead to non-trivial electronic steady states that can be controlled by the loss rate and the initial statistics of the quantum fields. We discuss the mechanism of the formation of such steady states on the basis of the equations of motion and present both analytical expressions and numerical simulations for such steady states. AU - Rose, Hendrik AU - Tikhonova, O V AU - Meier, Torsten AU - Sharapova, Polina ID - 37318 IS - 6 JF - New Journal of Physics KW - General Physics and Astronomy SN - 1367-2630 TI - Steady states of Λ-type three-level systems excited by quantum light with various photon statistics in lossy cavities VL - 24 ER - TY - JOUR AU - Grisard, S. AU - Rose, Hendrik AU - Trifonov, A. V. AU - Reichhardt, R. AU - Reiter, D. E. AU - Reichelt, Matthias AU - Schneider, C. AU - Kamp, M. AU - Höfling, S. AU - Bayer, M. AU - Meier, Torsten AU - Akimov, I. A. ID - 37319 IS - 20 JF - Physical Review B SN - 2469-9950 TI - Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses VL - 106 ER - TY - CONF AU - Trautmann, Alexander AU - Zuo, Ruixin AU - Wang, Guifang AU - Hannes, Wolf-Rüdiger AU - Yang, Shidong AU - Thong, Le Huu AU - Ngo, Cong AU - Steiner, Johannes AU - Ciappina, Marcelo AU - Reichelt, Matthias AU - Duc, Huynh Thanh AU - Song, Xiaohong AU - Yang, Weifeng AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 37329 T2 - Ultrafast Phenomena and Nanophotonics XXVI TI - Microscopic simulations of high harmonic generation from semiconductors VL - 11999 ER - TY - CONF AU - Rose, Hendrik AU - Tikhonova, Olga V. AU - Meier, Torsten AU - Sharapova, Polina ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 37327 T2 - Ultrafast Phenomena and Nanophotonics XXVI TI - Theoretical analysis of correlations between two quantum fields exciting a three-level system using the cluster-expansion approach VL - 11999 ER - TY - JOUR AU - Paul, J. AU - Rose, Hendrik AU - Swagel, E. AU - Meier, Torsten AU - Wahlstrand, J. K. AU - Bristow, A. D. ID - 37323 IS - 11 JF - Physical Review B SN - 2469-9950 TI - Coherent contributions to population dynamics in a semiconductor microcavity VL - 105 ER - TY - GEN AU - Meier, Torsten AU - Ali, Usman ID - 37325 T2 - Condensed Matter TI - Super-Bloch oscillations with parametric modulation of a parabolic trap ER - TY - CONF AB - We demonstrate theoretically and experimentally complex correlations in the photon numbers of two-mode quantum states using measurement-induced nonlinearity. For this, we combine the interference of coherent states and single photons with photon sub-traction. AU - Meier, Torsten AU - Hoepker, Jan Philipp AU - Protte, Maximilian AU - Eigner, Christof AU - Silberhorn, Christine AU - Sharapova, Polina R. AU - Sperling, Jan AU - Bartley, Tim ID - 43744 SN - 978-1-957171-05-0 T2 - Conference on Lasers and Electro-Optics: Applications and Technology TI - Two-Mode Photon-Number Correlations Created by Measurement-Induced Nonlinearity ER - TY - JOUR AB - High harmonic generation (HHG) from solids shows great application prospects in compact short-wavelength light sources and as a tool for imaging the dynamics in crystals with subnanometer spatial and attosecond temporal resolution. However, the underlying collision dynamics behind solid HHG is still intensively debated and no direct mapping relationship between the collision dynamics with band structure has been built. Here, we show that the electron and its associated hole can be elastically scattered by neighboring atoms when their wavelength approaches the atomic size. We reveal that the elastic scattering of electron/hole from neighboring atoms can dramatically influence the electron recombination with its left-behind hole, which turns out to be the fundamental reason for the anisotropic interband HHG observed recently in bulk crystals. Our findings link the electron/hole backward scattering with Van Hove singularities and forward scattering with critical lines in the band structure and thus build a clear mapping between the band structure and the harmonic spectrum. Our work provides a unifying picture for several seemingly unrelated experimental observations and theoretical predictions, including the anisotropic harmonic emission in MgO, the atomic-like recollision mechanism of solid HHG, and the delocalization of HHG in ZnO. This strongly improved understanding will pave the way for controlling the solid-state HHG and visualizing the structure-dependent electron dynamics in solids. AU - Zuo, Ruixin AU - Trautmann, Alexander AU - Wang, Guifang AU - Hannes, Wolf-Rüdiger AU - Yang, Shidong AU - Song, Xiaohong AU - Meier, Torsten AU - Ciappina, Marcelo AU - Duc, Huynh Thanh AU - Yang, Weifeng ID - 37331 JF - Ultrafast Science SN - 2765-8791 TI - Neighboring Atom Collisions in Solid-State High Harmonic Generation VL - 2021 ER - TY - JOUR AB - AbstractMethylammonium lead iodide perovskite (MAPbI3) is renowned for an impressive power conversion efficiency rise and cost-effective fabrication for photovoltaics. In this work, we demonstrate that polycrystalline MAPbI3s undergo drastic changes in optical properties at moderate field strengths with an ultrafast response time, via transient Wannier Stark localization. The distinct band structure of this material - the large lattice periodicity, the narrow electronic energy bandwidths, and the coincidence of these two along the same high-symmetry direction – enables relatively weak fields to bring this material into the Wannier Stark regime. Its polycrystalline nature is not detrimental to the optical switching performance of the material, since the least dispersive direction of the band structure dominates the contribution to the optical response, which favors low-cost fabrication. Together with the outstanding photophysical properties of MAPbI3, this finding highlights the great potential of this material in ultrafast light modulation and novel photonic applications. AU - Berghoff, Daniel AU - Bühler, Johannes AU - Bonn, Mischa AU - Leitenstorfer, Alfred AU - Meier, Torsten AU - Kim, Heejae ID - 37338 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry KW - Multidisciplinary SN - 2041-1723 TI - Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite VL - 12 ER - TY - JOUR AU - Thong, Le Huu AU - Ngo, Cong AU - Duc, Huynh Thanh AU - Song, Xiaohong AU - Meier, Torsten ID - 23477 JF - Physical Review B SN - 2469-9950 TI - Microscopic analysis of high harmonic generation in semiconductors with degenerate bands VL - 103 ER - TY - CONF AB - Population/mixing-time-dependent two-dimensional coherent spectra are presented for exciton-polaritons in a microcavity. Theory based on dynamically-controlled truncation reveals coherent and incoherent contributions to the decay dynamics. AU - Meier, Torsten AU - Paul, Jagannath AU - Rose, Hendrik AU - Wahlstrand, Jared K AU - Bristow, Alan D ID - 43746 SN - 978-1-55752-308-2 T2 - Frontiers in Optics TI - Coherent and incoherent contribution of population dynamics of semiconductor exciton-polaritons ER - TY - CONF AU - Reichelt, Matthias AU - Rose, Hendrik AU - Kosarev, Alexander N. AU - Poltavtsev, Sergey V. AU - Bayer, Manfred AU - Akimov, Ilya A. AU - Schneider, Christian AU - Kamp, Martin AU - Höfling, Sven AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 23474 T2 - Ultrafast Phenomena and Nanophotonics XXV TI - Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles VL - 11684 ER - TY - JOUR AU - Rose, Hendrik AU - Popolitova, D. V. AU - Tikhonova, O. V. AU - Meier, Torsten AU - Sharapova, Polina ID - 23478 JF - Physical Review A SN - 2469-9926 TI - Dark-state and loss-induced phenomena in the quantum-optical regime of Λ-type three-level systems VL - 103 ER - TY - JOUR AU - Belobo, Didier Belobo AU - Meier, Torsten ID - 23473 JF - New Journal of Physics SN - 1367-2630 TI - Approximate nonlinear wave solutions of the coupled two-component Gross–Pitaevskii equations with spin–orbit interaction VL - 23 ER - TY - JOUR AB - Uniaxial anisotropy in nonlinear birefringent crystals limits the efficiency of nonlinear optical interactions and breaks the spatial symmetry of light generated in the parametric down-conversion (PDC) process. Therefore, this effect is usually undesirable and must be compensated for. However, high gain may be used to overcome the destructive role of anisotropy in order to generate bright two-mode correlated twin-beams. In this work, we provide a rigorous theoretical description of the spatial properties of bright squeezed light in the presence of strong anisotropy. We investigate a single crystal and a system of two crystals with an air gap (corresponding to a nonlinear SU(1,1) interferometer) and demonstrate the generation of bright correlated twin-beams in such configurations at high gain due to anisotropy. We explore the mode structure of the generated light and show how anisotropy, together with crystal spacing, can be used for radiation shaping. AU - Riabinin, M. AU - Sharapova, Polina AU - Meier, Torsten ID - 37334 IS - 14 JF - Optics Express KW - Atomic and Molecular Physics KW - and Optics SN - 1094-4087 TI - Bright correlated twin-beam generation and radiation shaping in high-gain parametric down-conversion with anisotropy VL - 29 ER - TY - CONF AU - Rose, Hendrik AU - Paul, Jagannath AU - Wahlstrand, Jared K. AU - Bristow, Alan D. AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 23475 T2 - Ultrafast Phenomena and Nanophotonics XXV TI - Theoretical analysis and simulations of two-dimensional Fourier transform spectroscopy performed on exciton-polaritons of a quantum-well microcavity system VL - 11684 ER - TY - JOUR AU - Krauss-Kodytek, L. AU - Hannes, W.-R. AU - Meier, Torsten AU - Ruppert, C. AU - Betz, M. ID - 37333 IS - 8 JF - Physical Review B SN - 2469-9950 TI - Nondegenerate two-photon absorption in ZnSe: Experiment and theory VL - 104 ER - TY - JOUR AU - Riabinin, Matvei AU - Sharapova, Polina AU - Bartley, Tim AU - Meier, Torsten ID - 21547 IS - 4 JF - Journal of Physics Communications SN - 2399-6528 TI - Generating two-mode squeezing with multimode measurement-induced nonlinearity VL - 5 ER - TY - JOUR AU - Krauss-Kodytek, L. AU - Hannes, Wolf-Rüdiger AU - Meier, Torsten AU - Ruppert, C. AU - Betz, M. ID - 23472 IS - 8 JF - Physical Review B SN - 2469-9950 TI - Nondegenerate two-photon absorption in ZnSe: Experiment and theory VL - 104 ER - TY - JOUR AU - Zuo, R AU - Song, X AU - Meier, Torsten AU - Yang, W ID - 22883 IS - 8 JF - Journal of Physics: Conference Series SN - 1742-6588 TI - Carrier-wave population transfer in semiconductors VL - 1412 ER - TY - JOUR AB - AbstractSemiconductor quantum dots are excellent candidates for ultrafast coherent manipulation of qubits by laser pulses on picosecond timescales or even faster. In inhomogeneous ensembles a macroscopic optical polarization decays rapidly due to dephasing, which, however, is reversible in photon echoes carrying complete information about the coherent ensemble dynamics. Control of the echo emission time is mandatory for applications. Here, we propose a concept to reach this goal. In a two-pulse photon echo sequence, we apply an additional resonant control pulse with multiple of 2π area. Depending on its arrival time, the control slows down dephasing or rephasing of the exciton ensemble during its action. We demonstrate for self-assembled (In,Ga)As quantum dots that the photon echo emission time can be retarded or advanced by up to 5 ps relative to its nominal appearance time without control. This versatile protocol may be used to obtain significantly longer temporal shifts for suitably tailored control pulses. AU - Kosarev, Alexander N. AU - Rose, Hendrik AU - Poltavtsev, Sergey V. AU - Reichelt, Matthias AU - Schneider, Christian AU - Kamp, Martin AU - Höfling, Sven AU - Bayer, Manfred AU - Meier, Torsten AU - Akimov, Ilya A. ID - 20773 IS - 1 JF - Communications Physics SN - 2399-3650 TI - Accurate photon echo timing by optical freezing of exciton dephasing and rephasing in quantum dots VL - 3 ER - TY - JOUR AB - Vortices are topological objects representing the circular motion of a fluid. With their additional degree of freedom, the vorticity, they have been widely investigated in many physical systems and different materials for fundamental interest and for applications in data storage and information processing. Vortices have also been observed in non-equilibrium exciton-polariton condensates in planar semiconductor microcavities. There they appear spontaneously or can be created and pinned in space using ring-shaped optical excitation profiles. However, using the vortex state for information processing not only requires creation of a vortex but also efficient control over the vortex after its creation. Here we demonstrate a simple approach to control and switch a localized polariton vortex between opposite states. In our scheme, both the optical control of vorticity and its detection through the orbital angular momentum of the emitted light are implemented in a robust and practical manner. AU - Meier, Torsten AU - Ma, Xuekai AU - Berger, Bernd AU - Aßmann, Marc AU - Driben, Rodislav AU - Schneider, Christian AU - Höfling, Sven AU - Schumacher, Stefan ID - 43747 IS - 1 JF - Nature communications TI - Realization of all-optical vortex switching in exciton-polariton condensates VL - 11 ER - TY - CONF AU - Hannes, Wolf-Rüdiger AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 20770 SN - 9781510633193 T2 - Ultrafast Phenomena and Nanophotonics XXIV TI - k.p-based multiband simulations of non-degenerate two-photon absorption in bulk GaAs VL - 11278 ER - TY - JOUR AU - Hannes, W.-R. AU - Trautmann, Alexander AU - Stein, M. AU - Schäfer, F. AU - Koch, M. AU - Meier, Torsten ID - 20563 IS - 7 JF - Physical Review B TI - Strongly nonresonant four-wave mixing in semiconductors VL - 101 ER - TY - JOUR AU - Song, Xiaohong AU - Yang, Shidong AU - Zuo, Ruixin AU - Meier, Torsten AU - Yang, Weifeng ID - 20772 JF - Physical Review A SN - 2469-9926 TI - Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses VL - 101 ER - TY - JOUR AU - Ma, Xuekai AU - Berger, B AU - Aßmann, M AU - Driben, R AU - Meier, Torsten AU - Schneider, C AU - Höfling, S AU - Schumacher, Stefan ID - 20580 IS - 1 JF - Nature Communications SN - 2041-1723 TI - Realization of all-optical vortex switching in exciton-polariton condensates VL - 11 ER - TY - JOUR AU - Vondran, J. AU - Spitzer, F. AU - Bayer, M. AU - Akimov, I. A. AU - Trautmann, Alexander AU - Reichelt, Matthias AU - Meier, Cedrik AU - Weber, N. AU - Meier, Torsten AU - André, R. AU - Mariette, H. ID - 14544 IS - 15 JF - Physical Review B SN - 2469-9950 TI - Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure VL - 100 ER - TY - JOUR AB - An integrated chip with quantum state generation, active polarization manipulation, and precise time control is demonstrated. AU - Luo, Kai-Hong AU - Brauner, Sebastian AU - Eigner, Christof AU - Sharapova, Polina AU - Ricken, Raimund AU - Meier, Torsten AU - Herrmann, Harald AU - Silberhorn, Christine ID - 37288 IS - 1 JF - Science Advances KW - Multidisciplinary SN - 2375-2548 TI - Nonlinear integrated quantum electro-optic circuits VL - 5 ER - TY - CONF AU - Hannes, Wolf-Rüdiger AU - Krauß-Kodytek, Laura AU - Ruppert, Claudia AU - Betz, Markus AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 13285 SN - 9781510624740 T2 - Ultrafast Phenomena and Nanophotonics XXIII TI - Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors VL - 10916 ER - TY - JOUR AU - Hannes, Wolf-Rüdiger AU - Meier, Torsten ID - 13284 IS - 12 JF - Physical Review B SN - 2469-9950 TI - Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model VL - 99 ER - TY - CONF AB - The fundamental interband absorption in gallium arsenide shows a strong blue shift when biased by mid-infrared transients exceeding 10 MV/cm. This subcycle feature is induced by the localization of electronic wavefunctions from 3D to 2D. AU - Meier, Torsten AU - Bühler, Johannes AU - Schmidt, Christian AU - Heinrich, Alexander-Cornelius AU - Allerbeck, Jonas AU - Podzimski, Reinold AU - Berghoff, Daniel AU - Schmidt, Wolf Gero AU - Reichl, Christian AU - Wegscheider, Werner AU - Brida, Daniele AU - Leitenstorfer, Alfred ID - 43748 T2 - XXI International Conference on Ultrafast Phenomena 2018 (UP 2018) TI - Subcycle Wannier-Stark Localization by Mid-Infrared Bias in Gallium Arsenide VL - 205 ER - TY - JOUR AU - Vondran, J. AU - Spitzer, F. AU - Bayer, M. AU - Akimov, I. A. AU - Trautmann, Alexander AU - Reichelt, Matthias AU - Meier, Cedrik AU - Weber, N. AU - Meier, Torsten AU - André, R. AU - Mariette, H. ID - 22887 IS - 15 JF - Physical Review B SN - 2469-9950 TI - Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure VL - 100 ER - TY - GEN AB - Measurement-induced nonclassical effects in a two-mode interferometer are investigated theoretically using numerical simulations and analytical results. We demonstrate that for certain parameters measurements within the interferometer lead to the occurrence of two-mode squeezing. The results strongly depend on the detection probability, the phase inside the interferometer, and the choice of the input states. The appropriate parameters for maximized squeezing are obtained. We analyze the influence of losses and confirm that the predicted effects are within reach of current experimental techniques. AU - Riabinin, Matvei AU - Sharapova, Polina AU - Bartley, Tim AU - Meier, Torsten ID - 22884 T2 - arXiv:1912.09097 TI - Generating two-mode squeezing with multimode measurement-induced nonlinearity ER - TY - JOUR AU - Song, Xiaohong AU - Zuo, Ruixin AU - Yang, Shidong AU - Li, Pengcheng AU - Meier, Torsten AU - Yang, Weifeng ID - 13900 IS - 3 JF - Optics Express SN - 1094-4087 TI - Attosecond temporal confinement of interband excitation by intraband motion VL - 27 ER - TY - JOUR AU - Duc, Huynh Thanh AU - Ngo, Cong AU - Meier, Torsten ID - 13283 IS - 4 JF - Physical Review B SN - 2469-9950 TI - Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons VL - 100 ER - TY - JOUR AU - Driben, R AU - Ma, Xuekai AU - Schumacher, Stefan AU - Meier, Torsten ID - 20578 IS - 6 JF - Optics Letters SN - 0146-9592 TI - Bloch oscillations of multidimensional dark soliton wave packets and light bullets VL - 44 ER - TY - JOUR AU - Belobo, D. Belobo AU - Meier, T. ID - 13902 JF - Scientific Reports SN - 2045-2322 TI - Exotic complexes in one-dimensional Bose-Einstein condensates with spin-orbit coupling VL - 8 ER - TY - CONF AU - Sharapova, Polina AU - Luo, Kai Hong AU - Herrmann, Harald AU - Reichelt, Matthias AU - Silberhorn, Christine AU - Meier, Torsten ID - 40386 SN - 978-1-943580-42-2 T2 - Conference on Lasers and Electro-Optics TI - Manipulation of Two-Photon Interference by Entanglement ER - TY - JOUR AU - Belobo, D. Belobo AU - Meier, Torsten ID - 4365 IS - 1 JF - Scientific Reports SN - 2045-2322 TI - Exotic complexes in one-dimensional Bose-Einstein condensates with spin-orbit coupling VL - 8 ER - TY - CONF AU - Luo, Kai Hong AU - Brauner, Sebastian AU - Eigner, Christof AU - Sharapova, Polina AU - Ricken, Raimund AU - Meier, Torsten AU - Herrmann, Harald AU - Silberhorn, Christine ID - 40388 SN - 978-1-943580-42-2 T2 - Conference on Lasers and Electro-Optics TI - Monolithically Integrated Hong-Ou-Mandel Experiment in LiNbO3 ER - TY - CHAP AB - Short laser pulses are able to generate material excitations with a well-defined phase which is imposed by the optical excitation source. The generated coherent superposition state be described as an optical polarization which exists only in non-equilibrium situations. The coherence, i.e., the phase relations between the optical transitions that originate from the excitation, leads to several interesting effects in time-resolved linear and nonlinear optical spectroscopy. In this article, the basic principles that underlie these coherent transients are introduced and several examples are presented. AU - Meier, Torsten AU - Koch, S.W. ED - Guenther, Bob ED - Steel, Duncan ID - 43193 T2 - Encyclopedia of Modern Optics (Second Edition) TI - Foundations of Coherent Transients in Semiconductors VL - 4 ER - TY - JOUR AU - Schmidt, C. AU - Bühler, J. AU - Heinrich, A.-C. AU - Allerbeck, J. AU - Podzimski, R. AU - Berghoff, D. AU - Meier, Torsten AU - Schmidt, Wolf Gero AU - Reichl, C. AU - Wegscheider, W. AU - Brida, D. AU - Leitenstorfer, A. ID - 4370 IS - 1 JF - Nature Communications SN - 2041-1723 TI - Signatures of transient Wannier-Stark localization in bulk gallium arsenide VL - 9 ER - TY - JOUR AU - Schmidt, Claudia AU - Bühler, J. AU - Heinrich, A.-C. AU - Allerbeck, J. AU - Podzimski, R. AU - Berghoff, Daniel AU - Meier, Torsten AU - Schmidt, Wolf Gero AU - Reichl, C. AU - Wegscheider, W. AU - Brida, D. AU - Leitenstorfer, A. ID - 10018 JF - Nature Communications SN - 2041-1723 TI - Signatures of transient Wannier-Stark localization in bulk gallium arsenide VL - 9 ER - TY - JOUR AU - Geiger, Zachary A. AU - Fujiwara, Kurt M. AU - Singh, Kevin AU - Senaratne, Ruwan AU - Rajagopal, Shankari V. AU - Lipatov, Mikhail AU - Shimasaki, Toshihiko AU - Driben, Rodislav AU - Konotop, Vladimir V. AU - Meier, Torsten AU - Weld, David M. ID - 4369 IS - 21 JF - Physical Review Letters SN - 0031-9007 TI - Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas VL - 120 ER - TY - JOUR AU - Geiger, Zachary A. AU - Fujiwara, Kurt M. AU - Singh, Kevin AU - Senaratne, Ruwan AU - Rajagopal, Shankari V. AU - Lipatov, Mikhail AU - Shimasaki, Toshihiko AU - Driben, Rodislav AU - Konotop, Vladimir V. AU - Meier, Torsten AU - Weld, David M. ID - 13286 IS - 21 JF - Physical Review Letters SN - 0031-9007 TI - Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas VL - 120 ER - TY - JOUR AU - Driben, R. AU - Konotop, V. V. AU - Malomed, B. A. AU - Meier, Torsten AU - Yulin, A. V. ID - 13287 IS - 6 JF - Physical Review E SN - 2470-0045 TI - Nonlinearity-induced localization in a periodically driven semidiscrete system VL - 97 ER - TY - CONF AB - Sub-cycle transmission measurements of bulk gallium arsenide biased by intense mid-infrared transients reveal a strong blue-shift of the optical absorption when the peak electric field reaches 10 MV/cm, indicating 2D-localization of electronic wave functions. AU - Meier, Torsten AU - Bühler, Johannes AU - Schmidt, Christian AU - Heinrich, A-C. AU - Allerbeck, Jonas AU - Podzimski, Reinold AU - Berghoff, Daniel AU - Schmidt, Wolf Gero AU - Reichl, Christian AU - Wegscheider, Werner AU - Brida, Daniele AU - Leitenstorfer, Alfred ID - 43859 SN - 978-1-943580-42-2 T2 - CLEO: QELS_Fundamental Science TI - Wannier-Stark Localization in Bulk Gallium Arsenide Induced by Extreme Mid-Infrared Fields ER - TY - CONF AU - Akimov, Ilya AU - Poltavtsev, Sergey V. AU - Salewski, Matthias AU - Yugova, Irina A. AU - Karczewski, Grzegorz AU - Wojtowicz, Tomasz AU - Maciej, Wiater AU - Reichelt, Matthias AU - Meier, Torsten AU - Yakovlev, Dmitri AU - Bayer, Manfred ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 13901 SN - 9781510615458 T2 - Ultrafast Phenomena and Nanophotonics XXII TI - Coherent optical spectroscopy of charged exciton complexes in semiconductor nanostructures VL - 10530 ER - TY - CONF AU - Akimov, Ilya AU - Poltavtsev, Sergey V. AU - Salewski, Matthias AU - Yugova, Irina A. AU - Karczewski, Grzegorz AU - Wojtowicz, Tomasz AU - Maciej , Wiater AU - Reichelt, Matthias AU - Meier, Torsten AU - Yakovlev, Dmitri AU - Bayer, Manfred ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 4366 SN - 9781510615458 T2 - Ultrafast Phenomena and Nanophotonics XXII TI - Coherent optical spectroscopy of charged exciton complexes in semiconductor nanostructures VL - 10530 ER - TY - JOUR AU - Driben, R. AU - Konotop, V. V. AU - Malomed, B. A. AU - Meier, Torsten AU - Yulin, A. V. ID - 4368 IS - 6 JF - Physical Review E SN - 2470-0045 TI - Nonlinearity-induced localization in a periodically driven semidiscrete system VL - 97 ER - TY - JOUR AU - Yulin, A. AU - Driben, R. AU - Meier, Torsten ID - 13289 IS - 3 JF - Physical Review A SN - 2469-9926 TI - Bloch oscillations and resonant radiation of light propagating in arrays of nonlinear fibers with high-order dispersion VL - 96 ER - TY - JOUR AU - Podzimski, Reinold AU - Duc, Huynh Thanh AU - Meier, Torsten ID - 13332 IS - 20 JF - Physical Review B SN - 2469-9950 TI - Anisotropic excitons and their contributions to shift current transients in bulk GaAs VL - 96 ER - TY - JOUR AU - Poltavtsev, S. V. AU - Kosarev, A. N. AU - Akimov, I. A. AU - Yakovlev, D. R. AU - Sadofev, S. AU - Puls, J. AU - Hoffmann, S. P. AU - Albert, M. AU - Meier, Cedrik AU - Meier, Torsten AU - Bayer, M. ID - 7480 IS - 3 JF - Physical Review B SN - 2469-9950 TI - Time-resolved photon echoes from donor-bound excitons in ZnO epitaxial layers VL - 96 ER - TY - JOUR AU - Sharapova, Polina AU - Luo, Kai Hong AU - Herrmann, Harald AU - Reichelt, Matthias AU - Meier, Torsten AU - Silberhorn, Christine ID - 13906 IS - 12 JF - New Journal of Physics SN - 1367-2630 TI - Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits VL - 19 ER - TY - JOUR AU - Sharapova, Polina AU - Luo, Kai Hong AU - Herrmann, Harald AU - Reichelt, Matthias AU - Silberhorn, Christine AU - Meier, Torsten ID - 13905 IS - 4 JF - Physical Review A SN - 2469-9926 TI - Modified two-photon interference achieved by the manipulation of entanglement VL - 96 ER - TY - JOUR AU - Sharapova, Polina AU - Luo, Kai Hong AU - Herrmann, Harald AU - Reichelt, Matthias AU - Meier, Torsten AU - Silberhorn, Christine ID - 26061 IS - 12 JF - New Journal of Physics SN - 1367-2630 TI - Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits VL - 19 ER - TY - JOUR AU - Meier, Torsten AU - Sharapova, P.R. AU - Luo, K.H. AU - Herrmann, H. AU - Reichelt, Matthias AU - Silberhorn, C. ID - 43885 JF - arXiv preprint arXiv:1704.03769 TI - Generation and active manipulation of qubits in LiNbO3-based integrated circuits ER - TY - JOUR AU - Salewski, M. AU - Poltavtsev, S. V. AU - Yugova, I. A. AU - Karczewski, G. AU - Wiater, M. AU - Wojtowicz, T. AU - Yakovlev, D. R. AU - Akimov, I. A. AU - Meier, Torsten AU - Bayer, M. ID - 13909 IS - 3 JF - Physical Review X SN - 2160-3308 TI - High-Resolution Two-Dimensional Optical Spectroscopy of Electron Spins VL - 7 ER - TY - CONF AU - Höpker, Jan Philipp AU - Bartnick, Moritz AU - Meyer-Scott, Evan AU - Thiele, Frederik AU - Meier, Torsten AU - Bartley, Tim AU - Krapick, Stephan AU - Montaut, Nicola M. AU - Santandrea, Matteo AU - Herrmann, Harald AU - Lengeling, Sebastian AU - Ricken, Raimund AU - Quiring, Viktor AU - Lita, Adriana E. AU - Verma, Varun B. AU - Gerrits, Thomas AU - Nam, Sae Woo AU - Silberhorn, Christine ED - Agio, Mario ED - Srinivasan, Kartik ED - Soci, Cesare ID - 13903 SN - 9781510611733 T2 - Quantum Photonic Devices TI - Towards integrated superconducting detectors on lithium niobate waveguides VL - 10358 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh Thanh AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 13334 T2 - Ultrafast Phenomena and Nanophotonics XXI TI - A microscopic approach to ultrafast near band gap photocurrents in bulk semiconductors VL - 10102 ER - TY - JOUR AU - Poltavtsev, S. V. AU - Reichelt, Matthias AU - Akimov, I. A. AU - Karczewski, G. AU - Wiater, M. AU - Wojtowicz, T. AU - Yakovlev, D. R. AU - Meier, Torsten AU - Bayer, M. ID - 13908 IS - 7 JF - Physical Review B SN - 2469-9950 TI - Damping of Rabi oscillations in intensity-dependent photon echoes from exciton complexes in a CdTe/(Cd,Mg)Te single quantum well VL - 96 ER - TY - JOUR AU - Driben, R. AU - Konotop, V. V. AU - Meier, Torsten AU - Yulin, A. V. ID - 13288 IS - 1 JF - Scientific Reports SN - 2045-2322 TI - Bloch oscillations sustained by nonlinearity VL - 7 ER - TY - JOUR AU - Liu, Hong ID - 13913 JF - The European Physical Journal B SN - 1434-6028 TI - Influence of strong screening effect on the perpendicular- polarized linear excitonic absorption spectra of semiconducting carbon nanotubes VL - 89 ER - TY - JOUR AU - Sanz, M. AU - Egusquiza, I. L. AU - Di Candia, R. AU - Saberi, H. AU - Lamata, L. AU - Solano, E. ID - 13914 JF - Scientific Reports SN - 2045-2322 TI - Entanglement classification with matrix product states VL - 6 ER - TY - JOUR AU - Opatrný, Tomáš AU - Saberi, Hamed AU - Brion, Etienne AU - Mølmer, Klaus ID - 13921 IS - 2 JF - Physical Review A SN - 2469-9926 TI - Counterdiabatic driving in spin squeezing and Dicke-state preparation VL - 93 ER - TY - JOUR AU - Grynko, Yevgen AU - Zentgraf, Thomas AU - Meier, Torsten AU - Förstner, Jens ID - 1454 IS - 9 JF - Applied Physics B KW - tet_topic_meta KW - tet_topic_shg SN - 0946-2171 TI - Simulations of high harmonic generation from plasmonic nanoparticles in the terahertz region VL - 122 ER - TY - JOUR AU - Sternemann, E. AU - Jostmeier, T. AU - Ruppert, C. AU - Thunich, S. AU - Duc, H. T. AU - Podzimski, R. AU - Meier, Torsten AU - Betz, M. ID - 13919 JF - Applied Physics B SN - 0946-2171 TI - Quantum interference control of electrical currents in GaAs microstructures: physics and spectroscopic applications VL - 122 ER - TY - JOUR AB - For incident light polarized perpendicular to the tube axis the multi-band semiconductor Bloch equations (MB-SBEs) that involve various screened interband Coulomb interactions (ICIs) are derived. The calculated E 12 peak is very close to the longitudinal excitonic peak E 22. Compared with the previous theoretical peak positions, the blue-shift of the peak in our results is about 0.5 eV. Then, subsequent detailed analyses show that the screening effect on the diagonal ICIs (D-ICIs) plays a key role in this big blue-shift. The valley-degenerate transverse pair excitations holding the same selection rule further enhance the screening effect on D-ICIs. Specially at q = 0 the dielectric function acting on the D-ICIs enhances two times. In our calculation the strong screening effect contributes 90% of the big blue-shift, while the non-diagonal ICIs (ND-ICIs) contribute to 10% of the blue-shift. AU - Meier, Torsten AU - Liu, Hong ID - 43194 JF - The European Physical Journal B TI - Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes VL - 89 ER - TY - JOUR AB - We present the synthesis of indium oxide (In2O3) inverse opal films with photonic stop bands in the visible range by a structure replication method. Artificial opal films made of poly(methyl methacrylate) (PMMA) spheres are utilized as template. The opal films are deposited via sedimentation facilitated by ultrasonication, and then impregnated by indium nitrate solution, which is thermally converted to In2O3 after drying. The quality of the resulting inverse opal film depends on many parameters; in this study the water content of the indium nitrate/PMMA composite after drying is investigated. Comparison of the reflectance spectra recorded by vis-spectroscopy with simulated data shows a good agreement between the peak position and calculated stop band positions for the inverse opals. This synthesis is less complex and highly efficient compared to most other techniques and is suitable for use in many applications. AU - Amrehn, Sabrina AU - Berghoff, Daniel AU - Nikitin, Andreas AU - Reichelt, Matthias AU - Wu, Xia AU - Meier, Torsten AU - Wagner, Thorsten ID - 13917 JF - Photonics and Nanostructures - Fundamentals and Applications SN - 1569-4410 TI - Indium oxide inverse opal films synthesized by structure replication method VL - 19 ER - TY - JOUR AB - The dynamics of a pair of harmonic oscillators represented by three-dimensional fields coupled with a repulsive cubic nonlinearity is investigated through direct simulations of the respective field equations and with the help of the finite-mode Galerkin approximation (GA), which represents the two interacting fields by a superposition of 3+3 harmonic-oscillator p-wave eigenfunctions with orbital and magnetic quantum numbers l=1 and m=1, 0, −1. The system can be implemented in binary Bose-Einstein condensates, demonstrating the potential of the atomic condensates to emulate various complex modes predicted by classical field theories. First, the GA very accurately predicts a broadly degenerate set of the system's ground states in the p-wave manifold, in the form of complexes built of a dipole coaxial with another dipole or vortex, as well as complexes built of mutually orthogonal dipoles. Next, pairs of noncoaxial vortices and/or dipoles, including pairs of mutually perpendicular vortices, develop remarkably stable dynamical regimes, which feature periodic exchange of the angular momentum and periodic switching between dipoles and vortices. For a moderately strong nonlinearity, simulations of the coupled-field equations agree very well with results produced by the GA, demonstrating that the dynamics is accurately spanned by the set of six modes limited to l=1. AU - Driben, R. AU - Konotop, V. V. AU - Malomed, B. A. AU - Meier, Torsten ID - 13915 IS - 1 JF - Physical Review E SN - 2470-0045 TI - Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators VL - 94 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh Thanh AU - Priyadarshi, Shekhar AU - Schmidt, Christian AU - Bieler, Mark AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 13918 T2 - Ultrafast Phenomena and Nanophotonics XX TI - Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations VL - 9746 ER - TY - JOUR AB - Spins in semiconductor quantum dots have been considered as prospective quantum bit excitations. Their coupling to the crystal environment manifests itself in a limitation of the spin coherence times to the microsecond range, both for electron and hole spins. This rather short-lived coherence compared to atomic states asks for manipulations on timescales as short as possible. Due to the huge dipole moment for transitions between the valence and conduction band, pulsed laser systems offer the possibility to perform manipulations within picoseconds or even faster. Here, we report on results that show the potential of optical spin manipulations with currently available pulsed laser systems. Using picosecond laser pulses, we demonstrate optically induced spin rotations of electron and hole spins. We further realize the optical decoupling of the hole spins from the nuclear surrounding at the nanosecond timescales and demonstrate an all-optical spin tomography for interacting electron spin sub-ensembles. AU - Varwig, S. AU - Evers, E. AU - Greilich, A. AU - Yakovlev, D. R. AU - Reuter, Dirk AU - Wieck, A. D. AU - Meier, Torsten AU - Zrenner, Artur AU - Bayer, M. ID - 4246 IS - 1 JF - Applied Physics B KW - Spin Polarization KW - Pump Pulse KW - Trion KW - Spin Component KW - Coherence Time SN - 0946-2171 TI - Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots VL - 122 ER - TY - JOUR AU - Ma, Xuekai AU - Driben, Rodislav AU - Malomed, Boris A. AU - Meier, Torsten AU - Schumacher, Stefan ID - 13910 JF - Scientific Reports SN - 2045-2322 TI - Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction VL - 6 ER - TY - JOUR AB - A method is presented to transfer a system of two-level atoms from a spin coherent state to a maximally spin squeezed Dicke state, relevant for quantum metrology and quantum information processing. The initial state is the ground state of an initial linear Hamiltonian that is gradually turned into a final quadratic Hamiltonian whose ground state is the selected Dicke state. We use compensating operators to suppress diabatic transitions to unwanted states that would occur if the change were not slow. We discuss the possibilities of constructing the compensating operators by sequential application of quadratic Hamiltonians available in experiments. AU - Meier, Torsten AU - Opatrný, T. AU - Saberi, H. AU - Brion, E. AU - Mølmer, K. ID - 43196 IS - 2 JF - Physical Review A TI - Counterdiabatic driving in spin squeezing and Dicke-state preparation VL - 93 ER - TY - JOUR AB - We propose an entanglement classification for symmetric quantum states based on their diagonal matrix-product-state (MPS) representation. The proposed classification, which preserves the stochastic local operation assisted with classical communication (SLOCC) criterion, relates entanglement families to the interaction length of Hamiltonians. In this manner, we establish a connection between entanglement classification and condensed matter models from a quantum information perspective. Moreover, we introduce a scalable nesting property for the proposed entanglement classification, in which the families for N parties carry over to the N + 1 case. Finally, using techniques from algebraic geometry, we prove that the minimal nontrivial interaction length n for any symmetric state is bounded by . AU - Sanz, M. AU - Egusquiza, I.L. AU - Candia, R. Di AU - Saberi, H. AU - Lamata, L. AU - Solano, E. ID - 43195 JF - Scientific Reports TI - Entanglement classification with matrix product states VL - 6 ER - TY - JOUR AB - A microscopic approach that is based on the multisubband semiconductor Bloch equations formulated in the basis of a 14-band k⋅p model is employed to compute the temporal dynamics of photocurrents in GaAs quantum wells following excitation with femtosecond laser pulses. This approach provides a transparent description of the interband, intersubband, and intraband excitations, fully includes all resonant as well as off-resonant excitations, and treats the light-matter interaction nonperturbatively. For linearly polarized excitations, the photocurrents contain contributions from shift and rectification currents. We numerically compute and analyze these currents generated by excitation with femtosecond laser pulses for [110]- and [111]-oriented GaAs quantum wells. It is shown that the often employed perturbative χ(2) approach breaks down for peak fields larger than about 10 kV/cm, and that nonperturbative effects lead to a reduction of the peak values of the shift and rectification currents and to temporal oscillations that originate from Rabi flopping. In particular, we find a complex oscillatory photon energy dependence of the magnitudes of the shift and rectification currents. Our simulations demonstrate that this dependence is the result of mixing between the heavy- and light-hole valence bands. This is a surprising finding since the band mixing has an even larger influence on the strength of the photocurrents than the absorption coefficient. For [110]-oriented GaAs quantum wells, the calculated photon energy dependence is compared to experimental results, and good agreement is obtained. This validates our theoretical approach. AU - Duc, Huynh Thanh AU - Podzimski, Reinold AU - Priyadarshi, Shekhar AU - Bieler, Mark AU - Meier, Torsten ID - 22942 IS - 8 JF - Physical Review B SN - 2469-9950 TI - Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing VL - 94 ER - TY - JOUR AB - Nonlinearity is the driving force for numerous important effects in nature typically showing transitions between different regimes, regular, chaotic or catastrophic behavior. Localized nonlinear modes have been the focus of intense research in areas such as fluid and gas dynamics, photonics, atomic and solid state physics etc. Due to the richness of the behavior of nonlinear systems and due to the severe numerical demands of accurate three-dimensional (3D) numerical simulations presently only little knowledge is available on the dynamics of complex nonlinear modes in 3D. Here, we investigate the dynamics of 3D non-coaxial matter wave vortices that are trapped in a parabolic potential and interact via a repulsive nonlinearity. Our numerical simulations demonstrate the existence of an unexpected and fascinating nonlinear regime that starts immediately when the nonlinearity is switched-on and is characterized by a smooth dynamics representing torque-free precession with nutations. The reported motion is proven to be robust regarding various effects such as the number of particles, dissipation and trap deformations and thus should be observable in suitably designed experiments. Since our theoretical approach, i.e., coupled nonlinear Schrödinger equations, is quite generic, we expect that the obtained novel dynamical behavior should also exist in other nonlinear systems. AU - Driben, R. AU - Konotop, V. V. AU - Meier, Torsten ID - 13916 JF - Scientific Reports SN - 2045-2322 TI - Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices VL - 6 ER - TY - JOUR AB - We investigate the transient optical response in high-quality Cd0.88Zn0.12Te crystals in the regime of slow light propagation on the lower exciton-polariton branch. Femtosecond photoexcitation leads to very substantial transmission changes in a ∼10-meV broad spectral range within the transparency window of the unexcited semiconductor. These nonlinear optical signatures decay on picosecond time scales governed by carrier thermalization and recombination. The temporal and spectral dependence indicate the dynamical optical response as arising from excitation-induced dephasing and perturbed free induction decay. Model simulations for the optical response taking into account the actual exciton-polariton dispersion and excitation-induced dephasing of a nonlinearly driven two-level system support this interpretation. AU - Lohrenz, J. AU - Melzer, S. AU - Ruppert, C. AU - Akimov, I. A. AU - Mariette, H. AU - Reichelt, Matthias AU - Trautmann, Alexander AU - Meier, Torsten AU - Betz, M. ID - 13920 IS - 7 JF - Physical Review B SN - 2469-9950 TI - Ultrafast dynamical response of the lower exciton-polariton branch in CdZnTe VL - 93 ER - TY - JOUR AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A. V. ID - 13923 IS - 23 JF - Optics Letters SN - 0146-9592 TI - Interaction of high-order solitons with external dispersive waves VL - 40 ER - TY - JOUR AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A. V. ID - 13924 IS - 21 JF - Optics Letters SN - 0146-9592 TI - Weak and strong interactions between dark solitons and dispersive waves VL - 40 ER - TY - JOUR AU - Driben, R. AU - Yulin, A. V. AU - Efimov, A. ID - 13925 IS - 15 JF - Optics Express SN - 1094-4087 TI - Resonant radiation from oscillating higher order solitons VL - 23 ER - TY - JOUR AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A. V. ID - 13929 IS - 23 JF - Optics Letters SN - 0146-9592 TI - Interaction of high-order solitons with external dispersive waves VL - 40 ER - TY - JOUR AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A. V. ID - 13930 IS - 21 JF - Optics Letters SN - 0146-9592 TI - Weak and strong interactions between dark solitons and dispersive waves VL - 40 ER - TY - JOUR AU - Driben, R. AU - Yulin, A. V. AU - Efimov, A. ID - 13931 IS - 15 JF - Optics Express SN - 1094-4087 TI - Resonant radiation from oscillating higher order solitons VL - 23 ER - TY - JOUR AB - We present radiation mechanism exhibited by a higher order soliton. In a course of its evolution the higher-order soliton emits polychromatic radiation resulting in formation of multipeak frequency comb-like spectral band. The shape and spectral position of this band can be effectively controlled by the relative strength of the third order dispersion. An analytical description is corroborated by numerical simulations. It is shown that for longer pulses the described effect persists also under the action of higher order perturbations such as Raman and self-steepening. AU - Driben, R. AU - Yulin, A. V. AU - Efimov, A. ID - 43250 IS - 15 JF - Optics Express TI - Resonant radiation from oscillating higher order solitons VL - 23 ER - TY - JOUR AB - The effect of mutual interactions between dark solitons and dispersive waves is investigated numerically and analytically. The condition of the resonant scattering of dispersive waves on dark solitons is derived and compared against the results of the numerical simulations. It is shown that the interaction with intense dispersive waves affects the dynamics of the solitons by accelerating, decelerating, or destroying them. It is also demonstrated that two dark solitons can form a cavity for dispersive waves bouncing between the two dark solitons. The differences of the resonant scattering of the dispersive waves on dark and bright solitons are discussed. In particular, we demonstrate that two dark solitons and a dispersive wave bouncing in between them create a solitonic cavity with convex “mirrors,” unlike the concave “mirror” in the case of bright solitons. AU - Oreshnikov, I. AU - Yulin, A. V. AU - Driben, R. ID - 43249 IS - 21 JF - Optics Letters TI - Weak and strong interactions between dark solitons and dispersive waves VL - 40 ER - TY - CONF AB - The discovery of Airy waves, in the context of solutions to the linear Schrödinger equation [1], inspired extensive research for self-accelerating waves in optical settings [2-6]. Fascinating self-accelerating, self-healing light beams propagating along the bending trajectories can manifest themself in the spatial and the temporal domains and are promising for a large variety of potential applications. AU - Meier, Torsten AU - Driben, R. AU - Konotop, V.V. ID - 43892 SN - 978-1-4673-7475-0 T2 - European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference TI - Vectorial self-accelerating beams ER -