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 - TY - JOUR AB - Recently, a new class of nonlinear systems was introduced, in which the self-trapping of fundamental and vortical localized modes in space of dimension D is supported by cubic self-repulsion with a strength growing as a function of the distance from the center, r, at any rate faster that rD. These systems support robust 2D and 3D modes which either do not exist or are unstable in other nonlinear systems. Here we demonstrate a possibility to create solitary vortices in this setting by applying a phase-imprinting torque to the ground state. Initially, a strong torque completely destroys the ground state. However, contrary to usual systems, where the destruction is irreversible, the present ones demonstrate a rapid restabilization and the creation of one or several shifted vortices orbiting the center. For the sake of comparison, we show analytically that, in the linear system with a 3D trapping potential, the action of a torque on the ground state is inefficient and creates only even-vorticity states with a small probability. AU - Driben, Rodislav AU - Meier, Torsten AU - Malomed, Boris A. ID - 13935 JF - Scientific Reports SN - 2045-2322 TI - Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity VL - 5 ER - TY - JOUR AB - Recently, a new class of nonlinear systems was introduced, in which the self-trapping of fundamental and vortical localized modes in space of dimension D is supported by cubic self-repulsion with a strength growing as a function of the distance from the center, r, at any rate faster that rD. These systems support robust 2D and 3D modes which either do not exist or are unstable in other nonlinear systems. Here we demonstrate a possibility to create solitary vortices in this setting by applying a phase-imprinting torque to the ground state. Initially, a strong torque completely destroys the ground state. However, contrary to usual systems, where the destruction is irreversible, the present ones demonstrate a rapid restabilization and the creation of one or several shifted vortices orbiting the center. For the sake of comparison, we show analytically that, in the linear system with a 3D trapping potential, the action of a torque on the ground state is inefficient and creates only even-vorticity states with a small probability. AU - Driben, Rodislav AU - Meier, Torsten AU - Malomed, Boris A. ID - 22944 JF - Scientific Reports SN - 2045-2322 TI - Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity VL - 5 ER - TY - JOUR AB - It is demonstrated that a two-component Bose-Einstein condensate (BEC) with all-repulsive inter-atomic interactions loaded into a radially symmetric harmonic trap supports robust non-coaxial vortices with approximately orthogonal vortex lines in each of the components. These cross vortices are excited from the linear modes by a sudden switch-on of the nonlinearity (via Feshbach resonance) and are characterized by persistent dynamical regimes of precession with nutation, resembling the motion of a rigid body. The obtained dynamics can be understood qualitatively on the basis of a simple mechanical model. AU - Meier, Torsten AU - Driben, R. AU - Konotop, V.V. ID - 43896 JF - arXiv preprint arXiv:1505.04113 TI - Non-coaxial vortices in two-component Bose-Einstein condensates: Persistent precession and nutation ER - TY - JOUR AU - Liu, Hong AU - Heinze, Dirk Florian AU - Thanh Duc, Huynh AU - Schumacher, Stefan AU - Meier, Torsten ID - 13922 IS - 44 JF - Journal of Physics: Condensed Matter SN - 0953-8984 TI - Curvature effects in the band structure of carbon nanotubes including spin–orbit coupling VL - 27 ER - TY - JOUR AB - The Kane–Mele model was previously used to describe effective spin–orbit couplings (SOCs) in graphene. Here we extend this model and also incorporate curvature effects to analyze the combined influence of SOC and curvature on the band structure of carbon nanotubes (CNTs). The extended model then reproduces the chirality-dependent asymmetric electron-hole splitting for semiconducting CNTs and in the band structure for metallic CNTs shows an opening of the band gap and a change of the Fermi wave vector with spin. For chiral semiconducting CNTs with large chiral angle we show that the spin-splitting configuration of bands near the Fermi energy depends on the value of $\text{mod}(2n+m,3)$ . AU - Liu, Hong AU - Heinze, Dirk Florian AU - Thanh Duc, Huynh AU - Schumacher, Stefan AU - Meier, Torsten ID - 22946 IS - 44 JF - Journal of Physics: Condensed Matter SN - 0953-8984 TI - Curvature effects in the band structure of carbon nanotubes including spin–orbit coupling VL - 27 ER - TY - JOUR AB - We predict a variety of composite quiescent and spinning two- and three-dimensional (2D and 3D) self-trapped modes in media with a repulsive nonlinearity whose local strength grows from center to periphery. These are 2D dipoles and quadrupoles, and 3D octupoles, as well as vortex–antivortex pairs and quadruplets. Unlike other multidimensional models, where such complex bound states either do not exist or are subject to strong instabilities, these modes are remarkably robust in the present setting. The results are obtained by means of numerical methods and analytically, using the Thomas–Fermi approximation. The predicted states may be realized in optical and matter-wave media with controllable cubic nonlinearities AU - Driben, Rodislav AU - Dror, Nir AU - Malomed, Boris A AU - Meier, Torsten ID - 13926 JF - New Journal of Physics SN - 1367-2630 TI - Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity VL - 17 ER - TY - JOUR AB - We predict a variety of composite quiescent and spinning two- and three-dimensional (2D and 3D) self-trapped modes in media with a repulsive nonlinearity whose local strength grows from center to periphery. These are 2D dipoles and quadrupoles, and 3D octupoles, as well as vortex–antivortex pairs and quadruplets. Unlike other multidimensional models, where such complex bound states either do not exist or are subject to strong instabilities, these modes are remarkably robust in the present setting. The results are obtained by means of numerical methods and analytically, using the Thomas–Fermi approximation. The predicted states may be realized in optical and matter-wave media with controllable cubic nonlinearities AU - Driben, Rodislav AU - Dror, Nir AU - Malomed, Boris A AU - Meier, Torsten ID - 13932 JF - New Journal of Physics SN - 1367-2630 TI - Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity VL - 17 ER - TY - JOUR AB - We predict a variety of composite quiescent and spinning two- and three-dimensional (2D and 3D) self-trapped modes in media with a repulsive nonlinearity whose local strength grows from center to periphery. These are 2D dipoles and quadrupoles, and 3D octupoles, as well as vortex–antivortex pairs and quadruplets. Unlike other multidimensional models, where such complex bound states either do not exist or are subject to strong instabilities, these modes are remarkably robust in the present setting. The results are obtained by means of numerical methods and analytically, using the Thomas–Fermi approximation. The predicted states may be realized in optical and matter-wave media with controllable cubic nonlinearities AU - Driben, Rodislav AU - Dror, Nir AU - Malomed, Boris A. AU - Meier, Torsten ID - 22948 JF - New Journal of Physics SN - 1367-2630 TI - Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity VL - 17 ER - TY - CONF AU - Lange, C. AU - Schubert, O. AU - Hohenleutner, M. AU - Langer, F. AU - Baierl, S. AU - Maag, T. AU - Urbanek, B. AU - Edwards, E. R. J. AU - Woltersdorf, G. AU - Bougeard, D. AU - Huttner, U. AU - Golde, D. AU - Meier, Torsten AU - Kira, M. AU - Koch, S. W. AU - Huber, R. ED - Vodopyanov, Konstantin L. ID - 13927 T2 - Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV TI - Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors VL - 9347 ER - TY - CONF AU - Lange, C. AU - Schubert, O. AU - Hohenleutner, M. AU - Langer, F. AU - Baierl, S. AU - Maag, T. AU - Urbanek, B. AU - Edwards, E. R. J. AU - Woltersdorf, G. AU - Bougeard, D. AU - Huttner, U. AU - Golde, D. AU - Meier, Torsten AU - Kira, M. AU - Koch, S. W. AU - Huber, R. ED - Vodopyanov, Konstantin L. ID - 13933 T2 - Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV TI - Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors VL - 9347 ER - TY - CONF AU - Lange, C. AU - Schubert, O. AU - Hohenleutner, M. AU - Langer, F. AU - Baierl, S. AU - Maag, T. AU - Urbanek, B. AU - Edwards, E. R. J. AU - Woltersdorf, G. AU - Bougeard, D. AU - Huttner, U. AU - Golde, D. AU - Meier, Torsten AU - Kira, M. AU - Koch, S. W. AU - Huber, R. ED - Vodopyanov, Konstantin L. ID - 22949 T2 - Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV TI - Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors VL - 9347 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh T. AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Tsen, Kong-Thon ID - 22950 T2 - SPIE Proceedings Vol. 9361: Ultrafast Phenomena and Nanophotonics XIX TI - Time-domain calculations of shift currents in bulk GaAs VL - 9361 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh T. AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Tsen, Kong-Thon ID - 13934 T2 - Ultrafast Phenomena and Nanophotonics XIX TI - Time-domain calculations of shift currents in bulk GaAs VL - 9361 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh T. AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Tsen, Kong-Thon ID - 13928 T2 - Ultrafast Phenomena and Nanophotonics XIX TI - Time-domain calculations of shift currents in bulk GaAs VL - 9361 ER - TY - CONF AU - Podzimski, Reinold AU - Duc, Huynh T. AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Tsen, Kong-Thon ID - 22945 T2 - Ultrafast Phenomena and Nanophotonics XIX TI - Time-domain calculations of shift currents in bulk GaAs VL - 9361 ER - TY - JOUR AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A. V. ID - 22947 JF - Optics Letters SN - 0146-9592 TI - Interaction of high-order solitons with external dispersive waves ER - TY - JOUR AB - The effect of mutual interaction between second-order soliton and dispersive waves (DWs) is investigated. It is predicted analytically and confirmed numerically that DWs (both transmitted and reflected components) become polychromatic after interaction with the soliton. Collision with DWs of considerable intensity can lead to acceleration/deceleration and central frequency shift of the soliton, while still preserving the soliton’s oscillating structure. Two second-order solitons with resonant DWs trapped between them can form an effective solitonic cavity with “flat” or “concave mirrors,” depending on the intensity of the input. AU - Meier, Torsten AU - Oreshnikov, I. AU - Driben, R. AU - Yulin, A.V. ID - 43197 IS - 23 JF - Optics Letters TI - Interaction of high-order solitons with external dispersive waves VL - 40 ER - TY - JOUR AB - Ultrafast charge transport in strongly biased semiconductors is at the heart of high-speed electronics, electro-optics and fundamental solid-state physics1,2,3,4,5,6,7,8,9,10,11,12,13. Intense light pulses in the terahertz spectral range have opened fascinating vistas14,15,16,17,18,19,20,21. Because terahertz photon energies are far below typical electronic interband resonances, a stable electromagnetic waveform may serve as a precisely adjustable bias5,11,17,19. Novel quantum phenomena have been anticipated for terahertz amplitudes, reaching atomic field strengths8,9,10. We exploit controlled (multi-)terahertz waveforms with peak fields of 72 MV cm−1 to drive coherent interband polarization combined with dynamical Bloch oscillations in semiconducting gallium selenide. These dynamics entail the emission of phase-stable high-harmonic transients, covering the entire terahertz-to-visible spectral domain between 0.1 and 675 THz. Quantum interference of different ionization paths of accelerated charge carriers is controlled via the waveform of the driving field and explained by a quantum theory of inter- and intraband dynamics. Our results pave the way towards all-coherent terahertz-rate electronics. AU - Meier, Torsten AU - Schubert, O. AU - Hohenleutner, M. AU - Langer, F. AU - Urbanek, B. AU - Lange, C. AU - Huttner, U. AU - Golde, D. AU - Kira, M. AU - Koch, S. W. AU - Huber, R. ID - 43198 IS - 2 JF - Nature Photonics TI - Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations VL - 8 ER - TY - JOUR AB - The nonadiabatic dynamics of a many-body system driven through a quantum critical point can be controlled using counterdiabatic driving, where the formation of excitations is suppressed by assisting the dynamics with auxiliary multiple-body nonlocal interactions. We propose an alternative scheme which circumvents practical challenges to realize shortcuts to adiabaticity in mesoscopic systems by tailoring the functional form of the auxiliary counterdiabatic interactions. A driving scheme resorting in short-range few-body interactions is shown to generate an effectively adiabatic dynamics. AU - Saberi, H. AU - Opatrný, T. AU - Mølmer, K. AU - del Campo,, A. ID - 43251 IS - 6 JF - Physical Review A TI - Adiabatic tracking of quantum many-body dynamics VL - 90 ER - TY - CONF AB - The carrier wave of high-intensity phase-locked multi-THz pulses controls dynamical Bloch oscillations and interband polarization in bulk semiconductors, leading to the emission of all-coherent high-order harmonics covering 12.7 optical octaves from THz to VIS regimes. AU - Meier, Torsten ID - 43907 SN - 1-55752-286-3 T2 - Frontiers in Optics 2014, OSA Technical Digest TI - Coherent bloch oscillations driven by ultrastrong THz excitation ER - TY - CONF AB - Dynamical Bloch oscillations and coherent interband polarization in bulk GaSe are controlled by CEP-stable, ultra-intense multi-THz waveforms and result in the emission of phase-stable high-order harmonics covering 12.7 optical octaves from THz to VIS regimes. AU - Meier, Torsten AU - Langer, F. AU - Schubert, O. AU - Hohenleutner, M. AU - Urbanek, B. AU - Lange, C. AU - Huttner, U. AU - Golde, D. AU - Kira, M. AU - Koch, S.W. AU - Huber, R. ID - 43920 SN - 978-1-55752-999-2 T2 - CLEO: QELS_Fundamental Science TI - CEP control of dynamical Bloch oscillations in a bulk semiconductor via ultra-intense multi-THz fields ER - TY - JOUR AB - We show, by means of numerical and analytical methods, that media with a repulsive nonlinearity which grows from the center to the periphery support a remarkable variety of previously unknown complex stationary and dynamical three-dimensional (3D) solitary-wave states. Peanut-shaped modulation profiles give rise to vertically symmetric and antisymmetric vortex states, and novel stationary hybrid states, built of top and bottom vortices with opposite topological charges, as well as robust dynamical hybrids, which feature stable precession of a vortex on top of a zero-vorticity soliton. The analysis reveals stability regions for symmetric, antisymmetric, and hybrid states. In addition, bead-shaped modulation profiles give rise to the first example of exact analytical solutions for stable 3D vortex solitons. The predicted states may be realized in media with a controllable cubic nonlinearity, such as Bose–Einstein condensates. AU - Driben, Rodislav AU - Kartashov, Yaroslav V. AU - Malomed, Boris A. AU - Meier, Torsten AU - Torner, Lluis ID - 22957 JF - New Journal of Physics SN - 1367-2630 TI - Three-dimensional hybrid vortex solitons VL - 16 ER - TY - JOUR AB - We find that the recently introduced model of self-trapping supported by a spatially growing strength of a repulsive nonlinearity gives rise to robust vortex-soliton tori, i.e., three-dimensional vortex solitons, with topological charges S≥1. The family with S=1 is completely stable, while the one with S=2 has alternating regions of stability and instability. The families are nearly exactly reproduced in an analytical form by the Thomas-Fermi approximation. Unstable states with S=2 and 3 split into persistently rotating pairs or triangles of unitary vortices. Application of a moderate torque to the vortex torus initiates a persistent precession mode, with the torus’ axle moving along a conical surface. A strong torque heavily deforms the vortex solitons, but, nonetheless, they restore themselves with the axle oriented according to the vectorial addition of angular momenta. AU - Meier, Torsten AU - Driben, R. AU - Kartashov, Y. V. AU - Malomed, B. A. AU - Torner, L. ID - 43199 IS - 2 JF - Physical review letters TI - Soliton gyroscopes in media with spatially growing repulsive nonlinearity VL - 112 ER - TY - JOUR AB - Parametric down-conversion (PDC) forms one of the basic building blocks for quantum optical experiments. However, the intrinsic multimode spectral-temporal structure of pulsed PDC often poses a severe hindrance for the direct implementation of the heralding of pure single-photon states or, for example, continuous-variable entanglement distillation experiments. To get rid of multimode effects narrowband frequency filtering is frequently applied to achieve a single-mode behavior. A rigorous theoretical description to accurately describe the effects of filtering on PDC, however, is still missing. To date, the theoretical models of filtered PDC are rooted in the discrete-variable domain and only account for filtering in the low-gain regime, where only a few photon pairs are emitted at any single point in time. In this paper we extend these theoretical descriptions and put forward a simple model, which is able to accurately describe the effects of filtering on PDC in the continuous-variable domain. This developed straightforward theoretical framework enables us to accurately quantify the tradeoff between suppression of higher-order modes, reduced purity, and lowered Einstein–Podolsky–Rosen entanglement, when narrowband filters are applied to multimode type-II PDC. AU - Christ, Andreas AU - Lupo, Cosmo AU - Reichelt, Matthias AU - Meier, Torsten AU - Silberhorn, Christine ID - 22956 IS - 2 JF - Physical Review A SN - 1050-2947 TI - Theory of filtered type-II parametric down-conversion in the continuous-variable domain: Quantifying the impacts of filtering VL - 90 ER - TY - CONF AB - Ultra-intense and CEP-stable waveforms in the multi-THz range control dynamical Bloch oscillations and interband polarization in bulk GaSe, leading to the emission of all-coherent high-order harmonics covering 12.7 optical octaves from THz to VIS regimes. AU - Meier, Torsten AU - Hohenleutner, M. AU - Schubert, O. AU - Langer, F. AU - Urbanek, B. AU - Lange, C. AU - Huttner, U. AU - Golde, D. AU - Kira, M. AU - Koch, S.W. AU - Huber, R. ID - 43914 SN - 1-55752-279-0 T2 - 19th International Conference on Ultrafast Phenomena TI - Phase-locked multi-THz high-harmonic generation by dynamical bloch oscillations in bulk semiconductors ER - TY - JOUR AB - The dynamics of 3D Airy-vortex wave packets is studied under the action of strong self-focusing Kerr nonlinearity. Emissions of nonlinear 3D waves out of the main wave packets with the topological charges were demonstrated. Because of the conservation of the total angular momentum, charges of the emitted waves are equal to those carried by the parental light structure. The rapid collapse imposes a severe limitation on the propagation of multidimensional waves in Kerr media. However, the structure of the Airy beam carrier allows the coupling of light from the leading, most intense peak into neighboring peaks and consequently strongly postpones the collapse. The dependence of the critical input amplitude for the appearance of a fast collapse on the beam width is studied for wave packets with zero and nonzero topological charges. Wave packets carrying angular momentum are found to be much more resistant to the rapid collapse. AU - Driben, Rodislav AU - Meier, Torsten ID - 22955 IS - 19 JF - Optics Letters SN - 0146-9592 TI - Nonlinear dynamics of Airy-vortex 3D wave packets: emission of vortex light waves VL - 39 ER - TY - JOUR AB - The dynamics of two component-coupled vectorial Airy beams is investigated. In the linear propagation regime, a complete analytic solution describes the breather-like propagation of two components that feature nondiffracting self-accelerating Airy behavior. The superposition of two beams with different input properties opens the possibility of designing more complex nondiffracting propagation scenarios. In the strongly nonlinear regime, the dynamics remain qualitatively robust as is revealed by direct numerical simulations. Because of the Kerr effect, the two beams emit solitonic breathers whose coupling period is compatible with the remaining Airy-like beams. The results of this study are relevant for the description of photonic and plasmonic beams that propagate in coupled planar waveguides, as well as for birefrigent or multiwavelength beams. AU - Driben, R. AU - Konotop, V. V. AU - Meier, Torsten ID - 22954 IS - 19 JF - Optics Letters SN - 0146-9592 TI - Coupled Airy breathers VL - 39 ER - TY - CONF AB - Optical and infrared antennas provide a promising way to couple photons in and out of nanoscale structures. As counterpart to conventional radio antennas, they are able to increase optical felds in sub-wavelength volumes, to enhance excitation and emission of quantum emitters or to direct light, radiated by quantum emitters. The directed emission of these antennas has been mainly pursued by surface plasmon based devices, e.g. Yagi-Uda like antennas, which are rather complicated due to the coupling of several metallic particles. Also, like all metallic structures in optical or infrared regime, these devices are very sensitive to fabrication tolerances and are affected by strong losses. It has been shown recently, that such directed emission can be accomplished by dielectric materials as well. In this paper we present an optimization of nanoscopic antennas in the near infrared regime starting from a metallic Yagi-Uda structure. The optimization is done via a particle-swarm algorithm, using full time domain finite integration simulations to obtain the characteristics of the investigated structure, also taking into account substrates. Furthermore we present a dielectric antenna, which performs even better, due to the lack of losses by an appropriate choice of the dielectric material. These antennas are robust concerning fabrication tolerances and can be realized with different materials for both the antenna and the substrate, without using high index materials. AU - Hildebrandt, Andre AU - Reichelt, Matthias AU - Meier, Torsten AU - Förstner, Jens ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Song, Jin-Joo ED - Tsen, Kong-Thon ID - 3939 KW - tet_topic_opticalantenna T2 - Ultrafast Phenomena and Nanophotonics XVIII TI - Engineering plasmonic and dielectric directional nanoantennas VL - 8984 ER - TY - JOUR AB - Starting from the extended Su-Schrieffer-Heeger model, multiband semiconductor Bloch equations are formulated in momentum space and applied to the analysis of the linear optical response of semiconducting carbon nanotubes (SCNTs). This formalism includes the coupling of electron-hole pair excitations between different valence and conduction bands, originating from the electron-hole Coulomb attraction. The influence of these couplings, which are referred to as nondiagonal interband Coulomb interaction (NDI-CI), on the linear excitonic absorption spectra is investigated and discussed for light fields polarized parallel to the tube direction. The results show that the intervalley NDI-CI leads to a significant increase of the band gap and a decrease of the exciton binding energy that results in a blueshift of the lowest-frequency excitonic absorption peak. The strength of these effects depends on the symmetry of the SCNT. Furthermore, for zigzag SCNTs with higher symmetry other nonintervalley NDI-CI terms also affect the spectral positions of excitonic absorption peaks. AU - Liu, Hong AU - Schumacher, Stefan AU - Meier, Torsten ID - 15864 IS - 15 JF - Physical Review B SN - 1098-0121 TI - Influence of Coulomb-induced band couplings on linear excitonic absorption spectra of semiconducting carbon nanotubes VL - 89 ER - TY - JOUR AB - Dispersion management of periodically alternating fiber sections with opposite signs of two leading dispersion terms is applied for the regeneration of self-accelerating truncated Airy pulses. It is demonstrated that for such a dispersion management scheme, the direction of the acceleration of the pulse is reversed twice within each period. In this scheme the system features light hot spots in the center of each fiber section, where the energy of the light pulse is tightly focused in a short temporal slot. Comprehensive numerical studies demonstrate a long-lasting propagation also under the influence of a strong fiber Kerr nonlinearity. AU - Driben, R. AU - Meier, Torsten ID - 22958 IS - 4 JF - Physical Review A SN - 1050-2947 TI - Regeneration of Airy pulses in fiber-optic links with dispersion management of the two leading dispersion terms of opposite signs VL - 89 ER - TY - JOUR AU - Sternemann, E. AU - Jostmeier, T. AU - Ruppert, C. AU - Duc, H. T. AU - Meier, Torsten AU - Betz, M. ID - 22952 IS - 16 JF - Physical Review B SN - 1098-0121 TI - Femtosecond quantum interference control of electrical currents in GaAs: Signatures beyond the perturbative χ(3) limit VL - 88 ER - TY - JOUR AB - A mechanism for creating a Newton's cradle (NC) in nonlinear light wave trains under the action of the third-order dispersion (TOD) is demonstrated. The formation of the NC structure plays an important role in the process of fission of higher-order (N) solitons in optical fibers. After the splitting of the initial N soliton into a nonuniform chain of fundamental quasisolitons, the tallest one travels along the entire chain, through consecutive collisions with other solitons, and then escapes, while the remaining chain of pulses stays as a bound state, due to the radiation-mediated interaction between them. Increasing the initial soliton's order, N, leads to the transmission through, and release of additional solitons with enhanced power, along with the emission of radiation, which may demonstrate a broadband supercontinuum spectrum. The NC dynamical regime remains robust in the presence of extra perturbations, such as the Raman and self-steepening effects, and dispersion terms above the third order. It is demonstrated that essentially the same NC mechanism is induced by the TOD in finite segments of periodic wave trains (in particular, soliton chains). A difference from the mechanical NC is that the TOD-driven pulse passing through the soliton array collects energy and momentum from other solitons. Thus, uniform and nonuniform arrays of nonlinear wave pulses offer an essential extension of the mechanical NC, in which the quasiparticles, unlike mechanical beads, interact inelastically, exchanging energy and generating radiation. Nevertheless, the characteristic phenomenology of NC chains may be clearly identified in these nonlinear-wave settings too. AU - Driben, R. AU - Malomed, B.A. AU - Yulin, A. V. AU - Skryabin, D.V. ID - 43254 IS - 6 JF - Physical Review A TI - Newton's cradles in optics: From N-soliton fission to soliton chains VL - 87 ER - TY - JOUR AB - We considered the modulational instability of continuous-wave backgrounds, and the related generation and evolution of deterministic rogue waves in the recently introduced parity–time (P T)-symmetric system of linearly coupled nonlinear Schrödinger equations, which describes a Kerr-nonlinear optical coupler with mutually balanced gain and loss in its cores. Besides the linear coupling, the overlapping cores are coupled through the cross-phase-modulation term too. While the rogue waves, built according to the pattern of the Peregrine soliton, are (quite naturally) unstable, we demonstrate that the focusing cross-phase-modulation interaction results in their partial stabilization. For P T-symmetric and antisymmetric bright solitons, the stability region is found too, in an exact analytical form, and verified by means of direct simulations AU - Bludov, Y.V. AU - Driben, R. AU - Konotop, V.V. AU - Malomed, B.A. ID - 43256 IS - 6 JF - Journal of Optics TI - Instabilities, solitons and rogue waves in PT-coupled nonlinear waveguides VL - 15 ER - TY - JOUR AB - Optimization of the compression of input 𝑁 -solitons into robust ultra-narrow fundamental solitons, with a tunable up- or downshifted frequency, is proposed in photonic crystal fibers free of the Raman effect. Due to the absence of the Raman self-frequency shift, these fundamental solitons continue propagation, maintaining the acquired frequency, once separated from the input 𝑁 soliton’s temporal slot. A universal optimal value of the relative strength of the third-order dispersion is found, providing the strongest compression of the fundamental soliton is found. It depends only on the order of the injected 𝑁 -soliton. The largest compression degree significantly exceeds the analytical prediction supplied by the Satsuma–Yajima formula. The mechanism behind this effect, which remains valid in the presence of the self-steepening, is explained. AU - Driben, R. AU - Malomed, B.A. ID - 43252 IS - 18 JF - Optics Letters TI - Generation of tightly compressed solitons with a tunable frequency shift in Raman-free fibers VL - 38 ER - TY - JOUR AB - We demonstrate that the fission of higher-order N-solitons with a subsequent ejection of fundamental quasi-solitons creates cavities formed by a pair of solitary waves with dispersive light trapped between them. As a result of multiple reflections of the trapped light from the bounding solitons which act as mirrors, they bend their trajectories and collide. In the spectral domain, the two solitons receive blue and red wavelength shifts, and the spectrum of the trapped light alters as well. This phenomenon strongly affects spectral characteristics of the generated supercontinuum. Consideration of the system's parameters which affect the creation of the cavity reveals possibilities of predicting and controlling soliton-soliton collisions induced by multiple reflections of the trapped light. AU - Driben, R. AU - Yulin, A. V. AU - Efimov, A. AU - Malomed, B.A. ID - 43253 IS - 16 JF - Optics Express TI - Trapping of light in solitonic cavities and its role in the supercontinuum generation VL - 21 ER - TY - JOUR AB - By means of direct simulations and theoretical analysis, we study the nonlinear propagation of truncated Airy pulses in an optical fiber exhibiting both anomalous second-order and strong positive third-order dispersions (TOD). It is found that the Airy pulse first reaches a finite-size focal area as determined by the relative strength of the two dispersion terms, and then undergoes an inversion transformation such that it continues to travel with an opposite acceleration. The system notably features tight focusing if the TOD is a dominant factor. These effects are partially reduced by Kerr nonlinearity. AU - Driben, R. AU - Hu, Y. AU - Chen, Z. AU - Malomed, B.A. AU - Morandotti, R. ID - 43255 IS - 14 JF - Optics Letters TI - Inversion and tight focusing of Airy pulses under the action of third-order dispersion VL - 38 ER - TY - JOUR AB - We consider an effectively one-dimensional binary Bose-Einstein condensate (BEC) with nonlinear repulsive interactions and linear spin-orbit (SO) and Zeeman-splitting couplings. In the presence of the trapping harmonic-oscillator (HO) potential, we report the existence of even, odd, and asymmetric spatial modes. They feature alternating domains with opposite directions of the pseudospin, i.e., antiferromagnetic structures, which is explained by the interplay of the linear couplings, HO confinement, and repulsive self-interaction. The number of the domains is determined by the strength of the SO coupling. The modes are constructed analytically in the weakly nonlinear system. The dynamical stability of the modes is investigated by means of the Bogoliubov–de Gennes equations and direct simulations. A notable result is that the multi-domain-wall (DW) structures are stable, alternating between odd and even shapes, while the simplest single-DW structure is unstable. Thus, the system features a transition to the complex ground states under the action of the SO coupling. The addition of the Zeeman splitting transforms the odd modes into asymmetric ones via spontaneous symmetry breaking. The results suggest possibilities for switching the binary system between states with opposite (pseudo)magnetization by external fields, and realization of similar stable states and dynamical effects in solid-state and nonlinear-optical settings emulated by the SO-coupled BECs. AU - Zezyulin, D.A. AU - Driben, R. AU - Konotop, V.V. AU - Malomed, B.A. ID - 43258 IS - 1 JF - Physical Review A TI - Nonlinear modes in binary bosonic condensates with pseudo–spin-orbital coupling VL - 88 ER - TY - JOUR AB - We demonstrate that trapping of dispersive waves between two optical solitons takes place when resonant scattering of the waves on the solitons leads to nearly perfect reflections. The momentum transfer from the radiation to solitons results in their mutual attraction and a subsequent collision. The spectrum of the trapped radiation can either expand or shrink in the course of the propagation, which is controlled by arranging either collision or separation of the solitons. AU - Yulin, A. V. AU - Driben, R. AU - Malomed, B.A. AU - Skryabin, D.V. ID - 43257 IS - 12 JF - Optics Express TI - Soliton interaction mediated by cascaded four wave mixing with dispersive waves VL - 21 ER - TY - CONF AB - We perform experiments on resonant second-harmonic generation from planar gold split-ring-resonator arrays under normal incidence of light as a function of the lattice constant. Optimum nonlinear conversion occurs at intermediate lattice constants. AU - Niesler, Fabian B. AU - Linden, Stefan AU - Förstner, Jens AU - Grynko, Yevgen AU - Meier, Torsten AU - Wegener, Martin ID - 4039 IS - 1 KW - tet_topic_shg KW - tet_topic_meta SN - 9781557529435 T2 - Conference on Lasers and Electro-Optics 2012 TI - Collective effects in second-harmonic generation from split-ring-resonator arrays VL - 109 ER - TY - CONF AB - Previous experimental measurements and numerical simulations give evidence of strong electric and magnetic field interaction between split-ring resonators in dense arrays. One can expect that such interactions have an influence on the second harmonic generation. We apply the Discontinuous Galerkin Time Domain method and the hydrodynamic Maxwell-Vlasov model to simulate the linear and nonlinear optical response from SRR arrays. The simulations show that dense placement of the constituent building blocks appears not always optimal and collective effects can lead to a significant suppression of the near fields at the fundamental frequency and, consequently, to the decrease of the SHG intensity. We demonstrate also the great role of the symmetry degree of the array layout which results in the variation of the SHG efficiency in range of two orders of magnitude. AU - Grynko, Yevgen AU - Meier, Torsten AU - Linden, Stefan AU - Niesler, Fabian B. P. AU - Wegener, Martin AU - Förstner, Jens ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ED - Song, Jin-Joo ED - Tsen, Kong-Thon ID - 3961 KW - tet_topic_shg KW - tet_topic_meta T2 - Ultrafast Phenomena and Nanophotonics XVII TI - Optimal second-harmonic generation in split-ring resonator arrays VL - 8623 ER -