Prof. Dr. Torsten Meier

M. Reichelt, H. Rose, A.N. Kosarev, S.V. Poltavtsev, M. Bayer, I.A. Akimov, C. Schneider, M. Kamp, S. Höfling, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXV, 2021

DOI

Theoretical analysis and simulations of two-dimensional Fourier transform spectroscopy performed on exciton-polaritons of a quantum-well microcavity system

H. Rose, J. Paul, J.K. Wahlstrand, A.D. Bristow, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXV, 2021

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Low-field Onset of Wannier-Stark Localization in a Polycrystalline Hybrid Organic Inorganic Perovskite

D. Berghoff, J. Bühler, M. Bonn, A. Leitenstorfer, T. Meier, H. Kim, 2021

Abstract

<jats:title>Abstract</jats:title> <jats:p>Control over light propagation in a material by applying external fields is at the heart of photonic applications. Here, we demonstrate ultrafast modulation of the optical properties in the room temperature polycrystalline MAPbI<jats:sub>3</jats:sub> perovskite using phase-stable terahertz pulses, centered at 20 THz. The biasing field from the THz pulse creates extreme localization of electronic states in the <jats:italic>ab</jats:italic> plane – Wannier-Stark localization. This quasi-instantaneous reduction of dimensionality (from 3D to 2D) causes a marked change in the absorption shape, enabling the modulation depth to be tens of percent at moderate field strengths (3 MV/cm). The notably low-field onset results from a narrow electronic bandwidth, a large relevant lattice constant, and the coincidence of the two along the same direction in this tetragonal perovskite. We show that the transient optical response is in fact dominated by the least dispersive direction of the electronic band structure, facilitating a substantial modulation despite the arbitrary arrangement of the individual crystallites. The demonstration of THz-field-induced optical modulation in a solution-processed, disordered, and polycrystalline material is of substantial potential significance for novel photonic applications.</jats:p>

M. Riabinin, P. Sharapova, T. Meier, Optics Express (2021)

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Nondegenerate two-photon absorption in ZnSe: Experiment and theory

L. Krauss-Kodytek, W. Hannes, T. Meier, C. Ruppert, M. Betz, Physical Review B (2021)

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Microscopic analysis of high harmonic generation in semiconductors with degenerate bands

L.H. Thong, C. Ngo, H.T. Duc, X. Song, T. Meier, Physical Review B (2021)

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2020

Strongly nonresonant four-wave mixing in semiconductors

W. Hannes, A. Trautmann, M. Stein, F. Sch\, M. Koch, T. Meier, Phys. Rev. B (2020), 101, pp. 075203

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Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses

X. Song, S. Yang, R. Zuo, T. Meier, W. Yang, Physical Review A (2020), 101

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Accurate photon echo timing by optical freezing of exciton dephasing and rephasing in quantum dots

A.N. Kosarev, H. Rose, S.V. Poltavtsev, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, T. Meier, I.A. Akimov, Communications Physics (2020), 3

Abstract

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<jats:title>Abstract</jats:title><jats:p>Semiconductor 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 2<jats:italic>π</jats:italic> 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.</jats:p>

Carrier-wave population transfer in semiconductors

R. Zuo, X. Song, T. Meier, W. Yang, Journal of Physics: Conference Series (2020)

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k.p-based multiband simulations of non-degenerate two-photon absorption in bulk GaAs

W. Hannes, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXIV, 2020

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Realization of all-optical vortex switching in exciton-polariton condensates

X. Ma, B. Berger, M. Aßmann, R. Driben, T. Meier, C. Schneider, S. Höfling, S. Schumacher, Nature Communications (2020), 11

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Strongly nonresonant four-wave mixing in semiconductors

W. Hannes, A. Trautmann, M. Stein, F. Schäfer, M. Koch, T. Meier, Physical Review B (2020), 101(7)

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2019

Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model

W. Hannes, T. Meier, Physical Review B (2019), 99(12)

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Attosecond temporal confinement of interband excitation by intraband motion

X. Song, R. Zuo, S. Yang, P. Li, T. Meier, W. Yang, Optics Express (2019), 27

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Nonlinear integrated quantum electro-optic circuits

K. Luo, S. Brauner, C. Eigner, P.R. Sharapova, R. Ricken, T. Meier, H. Herrmann, C. Silberhorn, Science Advances (2019)

Abstract

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<jats:p>Future quantum computation and networks require scalable monolithic circuits, which incorporate various advanced functionalities on a single physical substrate. Although substantial progress for various applications has already been demonstrated on different platforms, the range of diversified manipulation of photonic states on demand on a single chip has remained limited, especially dynamic time management. Here, we demonstrate an electro-optic device, including photon pair generation, propagation, electro-optical path routing, as well as a voltage-controllable time delay of up to ~12 ps on a single Ti:LiNbO<jats:sub>3</jats:sub> waveguide chip. As an example, we demonstrate Hong-Ou-Mandel interference with a visibility of more than 93 ± 1.8%. Our chip not only enables the deliberate manipulation of photonic states by rotating the polarization but also provides precise time control. Our experiment reveals that we have full flexible control over single-qubit operations by harnessing the complete potential of fast on-chip electro-optic modulation.</jats:p>

Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors

W. Hannes, L. Krauß-Kodytek, C. Ruppert, M. Betz, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXIII, 2019

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Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure

J. Vondran, F. Spitzer, M. Bayer, I.A. Akimov, A. Trautmann, M. Reichelt, C. Meier, N. Weber, T. Meier, R. André, H. Mariette, Physical Review B (2019)

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Realization of all-optical vortex switching in exciton-polariton condensates

X. Ma, B. Berger, M. Assmann, R. Driben, T. Meier, C. Schneider, S. Höfling, S. Schumacher, in: arXiv:1907.03171, 2019

Abstract

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.

Bloch oscillations of multidimensional dark soliton wave packets and light bullets

R. Driben, X. Ma, S. Schumacher, T. Meier, Optics Letters (2019), 44(6)

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Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure

J. Vondran, F. Spitzer, M. Bayer, I.A. Akimov, A. Trautmann, M. Reichelt, C. Meier, N. Weber, T. Meier, R. André, H. Mariette, Physical Review B (2019)

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Generating two-mode squeezing with multimode measurement-induced nonlinearity

M. Riabinin, P. Sharapova, T. Bartley, T. Meier, in: arXiv:1912.09097, 2019

Abstract

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.

Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons

H.T. Duc, C. Ngo, T. Meier, Physical Review B (2019), 100(4)

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Bloch oscillations of multidimensional dark soliton wave packets and light bullets

R. Driben, X. Ma, S. Schumacher, T. Meier, Optics Letters (2019)

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2018

Coherent optical spectroscopy of charged exciton complexes in semiconductor nanostructures

I. Akimov, S.V. Poltavtsev, M. Salewski, I.A. Yugova, G. Karczewski, T. Wojtowicz, W. Maciej, M. Reichelt, T. Meier, D. Yakovlev, M. Bayer, in: Ultrafast Phenomena and Nanophotonics XXII, 2018, pp. 105300G

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Nonlinearity-induced localization in a periodically driven semidiscrete system

R. Driben, V.V. Konotop, B.A. Malomed, T. Meier, A.V. Yulin, Physical Review E (2018), 97(6)

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Signatures of transient Wannier-Stark localization in bulk gallium arsenide

C. Schmidt, J. Bühler, A. Heinrich, J. Allerbeck, R. Podzimski, D. Berghoff, T. Meier, W.G. Schmidt, C. Reichl, W. Wegscheider, D. Brida, A. Leitenstorfer, Nature Communications (2018), 9(1)

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Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas

Z.A. Geiger, K.M. Fujiwara, K. Singh, R. Senaratne, S.V. Rajagopal, M. Lipatov, T. Shimasaki, R. Driben, V.V. Konotop, T. Meier, D.M. Weld, Physical Review Letters (2018), 120(21)

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Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas

Z.A. Geiger, K.M. Fujiwara, K. Singh, R. Senaratne, S.V. Rajagopal, M. Lipatov, T. Shimasaki, R. Driben, V.V. Konotop, T. Meier, D.M. Weld, Physical Review Letters (2018), 120(21)

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Nonlinearity-induced localization in a periodically driven semidiscrete system

R. Driben, V.V. Konotop, B.A. Malomed, T. Meier, A.V. Yulin, Physical Review E (2018), 97(6)

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Exotic complexes in one-dimensional Bose-Einstein condensates with spin-orbit coupling

D.B. Belobo, T. Meier, Scientific Reports (2018), 8(1)

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Coherent optical spectroscopy of charged exciton complexes in semiconductor nanostructures

I. Akimov, S.V. Poltavtsev, M. Salewski, I.A. Yugova, G.. Karczewski, T. Wojtowicz, W.. Maciej , M. Reichelt, T. Meier, D. Yakovlev, M. Bayer, in: Ultrafast Phenomena and Nanophotonics XXII, SPIE, 2018

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Signatures of transient Wannier-Stark localization in bulk gallium arsenide

C. Schmidt, J. Bühler, A. Heinrich, J. Allerbeck, R. Podzimski, D. Berghoff, T. Meier, W.G. Schmidt, C. Reichl, W. Wegscheider, D. Brida, A. Leitenstorfer, Nature Communications (2018), 9, pp. 2890

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2017

Bloch oscillations and resonant radiation of light propagating in arrays of nonlinear fibers with high-order dispersion

A. Yulin, R. Driben, T. Meier, Physical Review A (2017), 96(3)

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Modified two-photon interference achieved by the manipulation of entanglement

P. Sharapova, K. Luo, H. Herrmann, M. Reichelt, C. Silberhorn, T. Meier, Physical Review A (2017), 96, pp. 043857

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Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits

P. Sharapova, K.H. Luo, H. Herrmann, M. Reichelt, T. Meier, C. Silberhorn, New Journal of Physics (2017), 19

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Anisotropic excitons and their contributions to shift current transients in bulk GaAs

R. Podzimski, H.T. Duc, T. Meier, Physical Review B (2017), 96(20)

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Towards integrated superconducting detectors on lithium niobate waveguides

J.P. Höpker, M. Bartnick, E. Meyer-Scott, F. Thiele, T. Meier, T. Bartley, S. Krapick, N.M. Montaut, M. Santandrea, H. Herrmann, S. Lengeling, R. Ricken, V. Quiring, A.E. Lita, V.B. Verma, T. Gerrits, S.W. Nam, C. Silberhorn, in: Quantum Photonic Devices, 2017, pp. 1035809

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Damping of Rabi oscillations in intensity-dependent photon echoes from exciton complexes in a CdTe/(Cd,Mg)Te single quantum well

S.V. Poltavtsev, M. Reichelt, I.A. Akimov, G. Karczewski, M. Wiater, T. Wojtowicz, D.R. Yakovlev, T. Meier, M. Bayer, Physical Review B (2017), 96, pp. 075306

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Bloch oscillations sustained by nonlinearity

R. Driben, V.V. Konotop, T. Meier, A.V. Yulin, Scientific Reports (2017)

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A microscopic approach to ultrafast near band gap photocurrents in bulk semiconductors

R. Podzimski, H.T. Duc, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXI, 2017

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High-Resolution Two-Dimensional Optical Spectroscopy of Electron Spins

M. Salewski, S. Poltavtsev, I. Yugova, G. Karczewski, M. Wiater, T. Wojtowicz, D. Yakovlev, I. Akimov, T. Meier, M. Bayer, Physical Review X (2017), 7, pp. 031030

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Time-resolved photon echoes from donor-bound excitons in ZnO epitaxial layers

S.V. Poltavtsev, A.N. Kosarev, I.A. Akimov, D.R. Yakovlev, S. Sadofev, J. Puls, S.P. Hoffmann, M. Albert, C. Meier, T. Meier, M. Bayer, Physical Review B (2017), 96(3)

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2016

Indium oxide inverse opal films synthesized by structure replication method

S. Amrehn, D. Berghoff, A. Nikitin, M. Reichelt, X. Wu, T. Meier, T. Wagner, Photonics and Nanostructures - Fundamentals and Applications (2016), 19, pp. 55-63

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Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations

R. Podzimski, H.T. Duc, S. Priyadarshi, C. Schmidt, M. Bieler, T. Meier, in: Ultrafast Phenomena and Nanophotonics XX, 2016

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Ultrafast dynamical response of the lower exciton-polariton branch in CdZnTe

J. Lohrenz, S. Melzer, C. Ruppert, I.A. Akimov, H. Mariette, M. Reichelt, A. Trautmann, T. Meier, M. Betz, Physical Review B (2016), 93(7)

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Quantum interference control of electrical currents in GaAs microstructures: physics and spectroscopic applications

E. Sternemann, T. Jostmeier, C. Ruppert, S. Thunich, H.T. Duc, R. Podzimski, T. Meier, M. Betz, Applied Physics B (2016), 122(44)

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Simulations of high harmonic generation from plasmonic nanoparticles in the terahertz region

Y. Grynko, T. Zentgraf, T. Meier, J. Förstner, Applied Physics B (2016), 122(9), pp. 242

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Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction

X. Ma, R. Driben, B.A. Malomed, T. Meier, S. Schumacher, Scientific Reports (2016), 6, pp. 34847

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Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators

R. Driben, V.V. Konotop, B.A. Malomed, T. Meier, Physical Review E (2016), 94(1)

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Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing

H.T. Duc, R. Podzimski, S. Priyadarshi, M. Bieler, T. Meier, Physical Review B (2016)

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Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices

R. Driben, V.V. Konotop, T. Meier, Scientific Reports (2016), 6, pp. 22758

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Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots

S. Varwig, E. Evers, A. Greilich, D.R. Yakovlev, D. Reuter, A.D. Wieck, T. Meier, A. Zrenner, M. Bayer, Applied Physics B (2016), 122(1)

Abstract

DOI

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.

Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction

X. Ma, R. Driben, B.A. Malomed, T. Meier, S. Schumacher, Scientific Reports (2016)

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2015

Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors

C. Lange, O. Schubert, M. Hohenleutner, F. Langer, S. Baierl, T. Maag, B. Urbanek, E.R.J. Edwards, G. Woltersdorf, D. Bougeard, U. Huttner, D. Golde, T. Meier, M. Kira, S.W. Koch, R. Huber, in: Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV, 2015

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Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity

R. Driben, T. Meier, B.A. Malomed, Scientific Reports (2015)

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Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity

R. Driben, N. Dror, B.A. Malomed, T. Meier, New Journal of Physics (2015), 17

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Time-domain calculations of shift currents in bulk GaAs

R. Podzimski, H.T. Duc, T. Meier, in: Ultrafast Phenomena and Nanophotonics XIX, 2015

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Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity

R. Driben, N. Dror, B.A. Malomed, T. Meier, New Journal of Physics (2015), 17

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Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors

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Curvature effects in the band structure of carbon nanotubes including spin–orbit coupling

H. Liu, D.F. Heinze, H. Thanh Duc, S. Schumacher, T. Meier, Journal of Physics: Condensed Matter (2015)

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Curvature effects in the band structure of carbon nanotubes including spin–orbit coupling

H. Liu, D.F. Heinze, H. Thanh Duc, S. Schumacher, T. Meier, Journal of Physics: Condensed Matter (2015), 27

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Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors

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Time-domain calculations of shift currents in bulk GaAs

R. Podzimski, H.T. Duc, T. Meier, in: Ultrafast Phenomena and Nanophotonics XIX, 2015

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Time-domain calculations of shift currents in bulk GaAs

R. Podzimski, H.T. Duc, T. Meier, in: Ultrafast Phenomena and Nanophotonics XIX, 2015

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Creation of vortices by torque in multidimensional media with inhomogeneous defocusing nonlinearity

R. Driben, T. Meier, B.A. Malomed, Scientific Reports (2015), 5, pp. 9420

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Time-domain calculations of shift currents in bulk GaAs

R. Podzimski, H.T. Duc, T. Meier, in: Ultrafast Phenomena and Nanophotonics XIX, 2015

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Multipoles and vortex multiplets in multidimensional media with inhomogeneous defocusing nonlinearity

R. Driben, N. Dror, B.A. Malomed, T. Meier, New Journal of Physics (2015)

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2014

Engineering plasmonic and dielectric directional nanoantennas

A. Hildebrandt, M. Reichelt, T. Meier, J. Förstner, in: Ultrafast Phenomena and Nanophotonics XVIII, SPIE, 2014, pp. 89841G-8941G-6

Abstract

DOI

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.

Theory of filtered type-II parametric down-conversion in the continuous-variable domain: Quantifying the impacts of filtering

A. Christ, C. Lupo, M. Reichelt, T. Meier, C. Silberhorn, Physical Review A (2014)

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Three-dimensional hybrid vortex solitons

R. Driben, Y.V. Kartashov, B.A. Malomed, T. Meier, L. Torner, New Journal of Physics (2014)

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Influence of Coulomb-induced band couplings on linear excitonic absorption spectra of semiconducting carbon nanotubes

H. Liu, S. Schumacher, T. Meier, Physical Review B (2014)

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Regeneration of Airy pulses in fiber-optic links with dispersion management of the two leading dispersion terms of opposite signs

R. Driben, T. Meier, Physical Review A (2014)

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Coupled Airy breathers

R. Driben, V.V. Konotop, T. Meier, Optics Letters (2014)

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Nonlinear dynamics of Airy-vortex 3D wave packets: emission of vortex light waves

R. Driben, T. Meier, Optics Letters (2014)

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2013

Collective effects in second-harmonic generation from split-ring-resonator arrays

F.B. Niesler, S. Linden, J. Förstner, Y. Grynko, T. Meier, M. Wegener, in: Conference on Lasers and Electro-Optics 2012, OSA, 2013

Abstract

DOI

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.

Optimal second-harmonic generation in split-ring resonator arrays

Y. Grynko, T. Meier, S. Linden, F.B.P. Niesler, M. Wegener, J. Förstner, in: Ultrafast Phenomena and Nanophotonics XVII, SPIE, 2013, pp. 86230L-86230L-9

Abstract

DOI

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.

Femtosecond quantum interference control of electrical currents in GaAs: Signatures beyond the perturbativeχ(3)limit

E. Sternemann, T. Jostmeier, C. Ruppert, H.T. Duc, T. Meier, M. Betz, Physical Review B (2013)

DOI

Selection rules and linear absorption spectra of carbon nanotubes in axial magnetic fields

H. Liu, S. Schumacher, T. Meier, Physical Review B (2013)

DOI

Generation and Time-Resolved Detection of Coherently Controlled Electric Currents at Surfaces

J. Güdde, M. Rohleder, T. Meier, S. Koch, U. Höfer, in: Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2013

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2012

Optimization of the intensity enhancement in plasmonic nanoantennas

A. Hildebrandt, M. Reichelt, T. Meier, J. Förstner, AIP AIP Conference Proceedings 1475, 2012

Abstract

DOI

We design the geometrical shape of plasmonic nanostructures to achieve field patterns with desired properties. For this, we combine Maxwell simulations and automatic optimization techniques. By allowing variations of the geometrical shape, which can be based on either boxes or arbitrary polygons, we maximize the desired objective.

Photonic crystal waveguides intersection for resonant quantum dot optical spectroscopy detection

X. Song, S. Declair, T. Meier, A. Zrenner, J. Förstner, Optics Express (2012), 20(13)

Abstract

DOI

Using a finite-difference time-domain method, we theoretically investigate the optical spectra of crossing perpendicular photonic crystal waveguides with quantum dots embedded in the central rod. The waveguides are designed so that the light mainly propagates along one direction and the cross talk is greatly reduced in the transverse direction. It is shown that when a quantum dot (QD) is resonant with the cavity, strong coupling can be observed via both the transmission and crosstalk spectrum. If the cavity is far off-resonant from the QD, both the cavity mode and the QD signal can be detected in the transverse direction since the laser field is greatly suppressed in this direction. This structure could have strong implications for resonant excitation and in-plane detection of QD optical spectroscopy.

Engineering high harmonic generation in semiconductors via pulse shaping

M. Reichelt, A. Hildebrandt, A. Walther, J. Förstner, T. Meier, in: Ultrafast Phenomena and Nanophotonics XVI, Proc. SPIE 8260, 2012, pp. 82601L

Abstract

DOI

Paper Abstract High harmonic generation is investigated for a two-band model of a semiconductor nanostructure. Similar to an atomic two-level system, the semiconductor emits high harmonic radiation. We show how one can specifically enhance the emission for a given frequency by applying a non-trivially shaped laser pulse. Therefore, the semiconductor Bloch equations including the interband and additionally the intraband dynamics are solved numerically and the spectral shape of the input pulse is computed via an optimization algorithm. It is demonstrated that desired emission frequencies can be favored even though the overall input power is kept constant. We also suggest special metallic nano geometries to achieve enhanced localized optical fields. They are found by geometric optimization.

Near-field coupling and second-harmonic generation in split-ring resonator arrays

Y. Grynko, T. Meier, S. Linden, F.B.P. Niesler, M. Wegener, J. Förstner, AIP Conference Proceedings 1475, 2012, pp. 128-130

Abstract

DOI

We simulate the linear and nonlinear optical response from split-ring resonator (SRR) arrays to study collective effects between the constituent SRRs that determine spectral properties of the second harmonic generation (SHG). We apply the Discontinuous Galerkin Time Domain (DGTD) method and the hydrodynamic Maxwell-Vlasov model to calculate the SHG emission. Our model is able to qualitatively reproduce and explain the non-monotonic dependence of the spectral SHG transmission measured experimentally for SRR arrays with different lattice constants

Tailoring the high-harmonic emission in two-level systems and semiconductors by pulse shaping

M. Reichelt, A. Walther, T. Meier, Journal of the Optical Society of America B (2012)

DOI

Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

S. Linden, F.B.P. Niesler, J. Förstner, Y. Grynko, T. Meier, M. Wegener, Physical Review Letters (2012)

DOI

Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

S. Linden, F.B.P. Niesler, J. Förstner, Y. Grynko, T. Meier, M. Wegener, Physical Review Letters (2012), 109(1), pp. 015502

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Optical experiments on second-harmonic generation from split-ring-resonator square arrays show a nonmonotonic dependence of the conversion efficiency on the lattice constant. This finding is interpreted in terms of a competition between dilution effects and linewidth or near-field changes due to interactions among the individual elements in the array.

2012 Niesler,Linden,Förstner,Grynko,Meier,Wegener_Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays.pdf -

2011

Injection currents in (110)-oriented GaAs/AlGaAs quantum wells: recent progress in theory and experiment

H.T. Duc, M. Pochwala, J. Förstner, T. Meier, S. Priyadarshi, A.M. Racu, K. Pierz, U. Siegner, M. Bieler, in: Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV, SPIE, 2011

Abstract

DOI

We experimentally and theoretically investigate injection currents generated by femtosecond single-color circularly-polarized laser pulses in (110)-oriented GaAs quantum wells. The current measurements are performed by detecting the emitted Terahertz radiation at room temperature. The microscopic theory is based on a 14 x 14 k • p band-structure calculation in combination with the multi-subband semiconductor Bloch equations. For symmetric GaAs quantum wells grown in (110) direction, an oscillatory dependence of the injection currents on the exciting photon energy is obtained. The results of the microscopic theory are in good agreement with the measurements.

Numerical analysis of coupled photonic crystal cavities

S. Declair, T. Meier, A. Zrenner, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications (2011), 9(4), pp. 345-350

Abstract

DOI

We numerically investigate the interaction dynamics of coupled cavities in planar photonic crystal slabs in different configurations. The single cavity is optimized for a long lifetime of the fundamental mode, reaching a Q-factor of ≈43, 000 using the method of gentle confinement. For pairs of cavities we consider several configurations and present a setup with strongest coupling observable as a line splitting of about 30 nm. Based on this configuration, setups with three cavities are investigated.

Intensity dependence of optically-induced injection currents in semiconductor quantum wells

M. Pochwala, H.T. Duc, J. Förstner, T. Meier, in: CLEO:2011 - Laser Applications to Photonic Applications, OSA, 2011

Abstract

DOI

The intensity dependence of optically-induced injection currents in semiconductor quantum wells is investigated numerically. Oscillatory behavior of the electron charge current transients as function of intensity and time is predicted and explained.

Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells

J. Hübner, S. Kunz, S. Oertel, D. Schuh, M. Pochwała, H.T. Duc, J. Förstner, T. Meier, M. Oestreich, Physical Review B (2011), 84(4), pp. 041301 (R)

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We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells, even a symmetric spatial envelope wave function gives rise to an asymmetric in-plane electron Land´e g-factor. The anisotropy is neither a direct consequence of the asymmetric in-plane Dresselhaus splitting nor a direct consequence of the asymmetric Zeeman splitting of the hole bands, but rather it is a pure higher-order effect that exists as well for diamond-type lattices. The measurements for various well widths are very well described within 14 × 14 band k·p theory and illustrate that the electron spin is an excellent meter variable for mapping out the internal—otherwise hidden—symmetries in two-dimensional systems. Fourth-order perturbation theory yields an analytical expression for the strength of the g-factor anisotropy, providing a qualitative understanding of the observed effects.

2011 Hübner,Kunz,Örtel,Schuh,Pochwala,Duc,Förstner,Meier,Östreich_Electron g -factor anisotropy in symmetric (110)-oriented GaAs quantum wells.pdf -

Simulation of the ultrafast nonlinear optical response of metal slabs

M. Wand, A. Schindlmayr, T. Meier, J. Förstner, Physica Status Solidi B (2011), 248(4), pp. 887-891

Abstract

DOI

WoS

We present a nonequilibrium ab initio method for calculating nonlinear and nonlocal optical effects in metallic slabs with a thickness of several nanometers. The numerical analysis is based on the full solution of the time‐dependent Kohn–Sham equations for a jellium system and allows to study the optical response of metal electrons subject to arbitrarily shaped intense light pulses. We find a strong localization of the generated second‐harmonic current in the surface regions of the slabs.

Application of the Discontinuous Galerkin Time Domain Method to the Optics of Bi-Chiral Plasmonic Crystals

Y. Grynko, J. Förstner, T. Meier, A. Radke, T. Gissibl, P.V. Braun, H. Giessen, D.N. Chigrin, AIP, 2011, pp. 76-78

Abstract

DOI

A simulation environment for metallic nanostructures based on the Discontinuous Galerkin Time Domain method is presented. It is used to model optical transmission by silver bi‐chiral plasmonic crystals. The results of simulations qualitatively and quantitavely agree with experimental measurements of transmitted circular polarization.

Numerical investigation of the coupling between microdisk modes and quantum dots

S. Declair, T. Meier, J. Förstner, physica status solidi (c) (2011), 8(4), pp. 1254-1257

Abstract

DOI

We numerically investigate the coupling between circular resonators and study strong light‐matter coupling of single as well as multiple circular resonators to quantum‐mechanical resonators in two dimensional model simulations. For all cases, the computed resonances of the coupled system as function of the detuning show anti‐crossings. The obtained mode splittings of coupled optical resonators are strongly depending on distance and cluster in almost degenerate eigenstates for large distances, as is known from coupled resonator optical waveguides. Vacuum Rabi splitting is observed for a quantum dot strongly coupled to eigenmodes of single perfectly cylindrical resonators.

Intensity-dependent ultrafast dynamics of injection currents in unbiased GaAs quantum wells

M. Pochwała, H.T. Duc, J. Förstner, T. Meier, physica status solidi (RRL) - Rapid Research Letters (2011), 5(3), pp. 119-121

Abstract

DOI

The intensity dependence of optically-induced injection currents in unbiased GaAs semiconductor quantum wells grown in [110] direction is investigated theoretically for a number of well widths. Our microscopic analysis is based on a 14 x 14 band k . p method in combination with the multisubband semiconductor Bloch equations. An oscillatory dependence of the injection current transients as function of intensity and time is predicted and explained. It is demonstrated that optical excitations involving different subbands and Rabi flopping are responsible for this complex dynamics.

Theoretical approach to the ultrafast nonlinear optical response of metal slabs

M. Wand, A. Schindlmayr, T. Meier, J. Förstner, in: CLEO:2011 - Laser Applications to Photonic Applications , Optical Society of America, 2011

Abstract

DOI

WoS

We present an ab-initio method for calculating nonlinear and nonlocal optical effects in metallic slabs with sub-wavelength thickness. We find a strong localization of the second-harmonic current at the metal-vacuum interface.

Application of the discontinous Galerkin time domain method to the optics of metallic nanostructures

Y. Grynko, J. Förstner, T. Meier, AAPP | Atti della Accademia Peloritana dei Pericolanti (2011), 89(1)

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A simulation environment for metallic nanostructures based on the Discontinuous Galerkin Time Domain method is presented. The model is used to compute the linear and nonlinear optical response of split ring resonators and to study physical mechanisms that contribute to second harmonic generation.

2011 Grynko,Förstner,Meier_Application of the discontinous Galerkin time domain method to the optics of metallic nanostructures.pdf -

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