@article{4246,
  abstract     = {{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.}},
  author       = {{Varwig, S. and Evers, E. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Meier, Torsten and Zrenner, Artur and Bayer, M.}},
  issn         = {{0946-2171}},
  journal      = {{Applied Physics B}},
  keywords     = {{Spin Polarization, Pump Pulse, Trion, Spin Component, Coherence Time}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  title        = {{{Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots}}},
  doi          = {{10.1007/s00340-015-6274-y}},
  volume       = {{122}},
  year         = {{2016}},
}

@article{43194,
  abstract     = {{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.}},
  author       = {{Meier, Torsten and Liu, Hong}},
  journal      = {{The European Physical Journal B}},
  title        = {{{Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes}}},
  doi          = {{10.1140/epjb/e2016-70476-8}},
  volume       = {{89}},
  year         = {{2016}},
}

@article{43196,
  abstract     = {{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.}},
  author       = {{Meier, Torsten and Opatrný, T. and Saberi, H. and Brion, E. and Mølmer, K.}},
  journal      = {{Physical Review A}},
  number       = {{2}},
  title        = {{{Counterdiabatic driving in spin squeezing and Dicke-state preparation}}},
  doi          = {{10.1103/PhysRevA.93.023815}},
  volume       = {{93}},
  year         = {{2016}},
}

@article{1454,
  author       = {{Grynko, Yevgen and Zentgraf, Thomas and Meier, Torsten and Förstner, Jens}},
  issn         = {{0946-2171}},
  journal      = {{Applied Physics B}},
  keywords     = {{tet_topic_meta, tet_topic_shg}},
  number       = {{9}},
  pages        = {{242}},
  publisher    = {{Springer Nature}},
  title        = {{{Simulations of high harmonic generation from plasmonic nanoparticles in the terahertz region}}},
  doi          = {{10.1007/s00340-016-6510-0}},
  volume       = {{122}},
  year         = {{2016}},
}

@inproceedings{43892,
  abstract     = {{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.}},
  author       = {{Meier, Torsten and Driben, R. and Konotop, V.V.}},
  booktitle    = {{European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference}},
  isbn         = {{978-1-4673-7475-0}},
  location     = {{Munich, Germany}},
  publisher    = {{IEEE}},
  title        = {{{Vectorial self-accelerating beams}}},
  year         = {{2015}},
}

@article{13935,
  abstract     = {{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.}},
  author       = {{Driben, Rodislav and Meier, Torsten and Malomed, Boris A.}},
  issn         = {{2045-2322}},
  journal      = {{Scientific Reports}},
  title        = {{{Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity}}},
  doi          = {{10.1038/srep09420}},
  volume       = {{5}},
  year         = {{2015}},
}

@article{22944,
  abstract     = {{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.}},
  author       = {{Driben, Rodislav and Meier, Torsten and Malomed, Boris A.}},
  issn         = {{2045-2322}},
  journal      = {{Scientific Reports}},
  title        = {{{Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity}}},
  doi          = {{10.1038/srep09420}},
  volume       = {{5}},
  year         = {{2015}},
}

@article{43896,
  abstract     = {{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.}},
  author       = {{Meier, Torsten and Driben, R. and Konotop, V.V.}},
  journal      = {{arXiv preprint arXiv:1505.04113}},
  title        = {{{Non-coaxial vortices in two-component Bose-Einstein condensates: Persistent precession and nutation}}},
  doi          = {{10.48550/arXiv.1505.04113}},
  year         = {{2015}},
}

@article{13926,
  abstract     = {{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}},
  author       = {{Driben, Rodislav and Dror, Nir and Malomed, Boris A and Meier, Torsten}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity}}},
  doi          = {{10.1088/1367-2630/17/8/083043}},
  volume       = {{17}},
  year         = {{2015}},
}

@article{13932,
  abstract     = {{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}},
  author       = {{Driben, Rodislav and Dror, Nir and Malomed, Boris A and Meier, Torsten}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity}}},
  doi          = {{10.1088/1367-2630/17/8/083043}},
  volume       = {{17}},
  year         = {{2015}},
}

@article{22948,
  abstract     = {{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}},
  author       = {{Driben, Rodislav and Dror, Nir and Malomed, Boris A. and Meier, Torsten}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity}}},
  doi          = {{10.1088/1367-2630/17/8/083043}},
  volume       = {{17}},
  year         = {{2015}},
}

@inproceedings{13927,
  author       = {{Lange, C. and Schubert, O. and Hohenleutner, M. and Langer, F. and Baierl, S. and Maag, T. and Urbanek, B. and Edwards, E. R. J. and Woltersdorf, G. and Bougeard, D. and Huttner, U. and Golde, D. and Meier, Torsten and Kira, M. and Koch, S. W. and Huber, R.}},
  booktitle    = {{Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV}},
  editor       = {{Vodopyanov, Konstantin L.}},
  publisher    = {{SPIE}},
  title        = {{{Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors}}},
  doi          = {{10.1117/12.2085101}},
  volume       = {{9347}},
  year         = {{2015}},
}

@inproceedings{13933,
  author       = {{Lange, C. and Schubert, O. and Hohenleutner, M. and Langer, F. and Baierl, S. and Maag, T. and Urbanek, B. and Edwards, E. R. J. and Woltersdorf, G. and Bougeard, D. and Huttner, U. and Golde, D. and Meier, Torsten and Kira, M. and Koch, S. W. and Huber, R.}},
  booktitle    = {{Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV}},
  editor       = {{Vodopyanov, Konstantin L.}},
  publisher    = {{SPIE}},
  title        = {{{Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors}}},
  doi          = {{10.1117/12.2085101}},
  volume       = {{9347}},
  year         = {{2015}},
}

@inproceedings{22949,
  author       = {{Lange, C. and Schubert, O. and Hohenleutner, M. and Langer, F. and Baierl, S. and Maag, T. and Urbanek, B. and Edwards, E. R. J. and Woltersdorf, G. and Bougeard, D. and Huttner, U. and Golde, D. and Meier, Torsten and Kira, M. and Koch, S. W. and Huber, R.}},
  booktitle    = {{Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV}},
  editor       = {{Vodopyanov, Konstantin L.}},
  publisher    = {{SPIE}},
  title        = {{{Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors}}},
  doi          = {{10.1117/12.2085101}},
  volume       = {{9347}},
  year         = {{2015}},
}

@inproceedings{22950,
  author       = {{Podzimski, Reinold and Duc, Huynh T. and Meier, Torsten}},
  booktitle    = {{SPIE Proceedings Vol. 9361: Ultrafast Phenomena and Nanophotonics XIX}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Tsen, Kong-Thon}},
  publisher    = {{SPIE}},
  title        = {{{Time-domain calculations of shift currents in bulk GaAs}}},
  doi          = {{10.1117/12.2078123}},
  volume       = {{9361}},
  year         = {{2015}},
}

@inproceedings{13934,
  author       = {{Podzimski, Reinold and Duc, Huynh T. and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XIX}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Tsen, Kong-Thon}},
  publisher    = {{SPIE}},
  title        = {{{Time-domain calculations of shift currents in bulk GaAs}}},
  doi          = {{10.1117/12.2078123}},
  volume       = {{9361}},
  year         = {{2015}},
}

@inproceedings{13928,
  author       = {{Podzimski, Reinold and Duc, Huynh T. and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XIX}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Tsen, Kong-Thon}},
  publisher    = {{SPIE}},
  title        = {{{Time-domain calculations of shift currents in bulk GaAs}}},
  doi          = {{10.1117/12.2078123}},
  volume       = {{9361}},
  year         = {{2015}},
}

@inproceedings{22945,
  author       = {{Podzimski, Reinold and Duc, Huynh T. and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XIX}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Tsen, Kong-Thon}},
  publisher    = {{SPIE}},
  title        = {{{Time-domain calculations of shift currents in bulk GaAs}}},
  doi          = {{10.1117/12.2078123}},
  volume       = {{9361}},
  year         = {{2015}},
}

@article{43197,
  abstract     = {{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.}},
  author       = {{Meier, Torsten and Oreshnikov, I. and Driben, R. and Yulin, A.V.}},
  journal      = {{Optics Letters}},
  number       = {{23}},
  pages        = {{5554--5557}},
  title        = {{{Interaction of high-order solitons with external dispersive waves}}},
  doi          = {{10.1364/OL.40.005554}},
  volume       = {{40}},
  year         = {{2015}},
}

@article{22946,
  abstract     = {{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 $\text{mod}(2n+m,3)$ .}},
  author       = {{Liu, Hong and Heinze, Dirk Florian and Thanh Duc, Huynh and Schumacher, Stefan and Meier, Torsten}},
  issn         = {{0953-8984}},
  journal      = {{Journal of Physics: Condensed Matter}},
  number       = {{44}},
  title        = {{{Curvature effects in the band structure of carbon nanotubes including spin–orbit coupling}}},
  doi          = {{10.1088/0953-8984/27/44/445501}},
  volume       = {{27}},
  year         = {{2015}},
}