@article{673, author = {{Waldmüller, I. and Förstner, Jens and Lee, S.-C. and Knorr, A. and Woerner, M. and Reimann, K. and Kaindl, R. A. and Elsaesser, T. and Hey, R. and Ploog, K. H.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{20}}, publisher = {{American Physical Society (APS)}}, title = {{{Optical dephasing of coherent intersubband transitions in a quasi-two-dimensional electron gas}}}, doi = {{10.1103/physrevb.69.205307}}, volume = {{69}}, year = {{2004}}, } @article{4272, abstract = {{The coupling of surface and bulk states at semiconductor surfaces through electron–phonon interaction is discussed. The governing equations are derived from a microscopic theory in the framework of the density matrix theory. To gain a first insight, model wave functions are used to simulate the dynamics of nonequilibrium electron distributions in three- and two-dimensional states, coupled by Fröhlich interaction. Typical time scales for the coupling are found to be in the order of few hundreds of femtoseconds.}}, author = {{Zeiser, Andreas and Bücking, Norbert and Götte, Jörg and Förstner, Jens and Hahn, Patrick and Schmidt, Wolf Gero and Knorr, Andreas}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, number = {{12}}, pages = {{R60--R62}}, publisher = {{Wiley}}, title = {{{Dynamics of the phonon-induced electron transfer between semiconductor bulk and surface states}}}, doi = {{10.1002/pssb.200409060}}, volume = {{241}}, year = {{2004}}, } @article{4288, abstract = {{We report the experimental observation and the theoretical modeling of self-induced-transparency signatures such as nonlinear transmission, pulse retardation and reshaping, for subpicosecond pulse propagation in a 2-mm-long InGaAs quantum-dot ridge waveguide in resonance with the excitonic ground-state transition at 10 K. The measurements were obtained by using a cross-correlation frequency-resolved optical gating technique which allows us to retrieve the field amplitude of the propagating pulses.}}, author = {{Schneider, S. and Borri, P. and Langbein, W. and Woggon, U. and Förstner, Jens and Knorr, A. and Sellin, R. L. and Ouyang, D. and Bimberg, D.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{tet_topic_qd}}, number = {{18}}, pages = {{3668--3670}}, publisher = {{AIP Publishing}}, title = {{{Self-induced transparency in InGaAs quantum-dot waveguides}}}, doi = {{10.1063/1.1624492}}, volume = {{83}}, year = {{2003}}, } @article{4290, abstract = {{The nonlinear propagation of subpicosecond pulses resonant to the hh 1s exciton in Bragg-periodic multiple quantum wells is investigated experimentally and theoretically. We show coherent pulse breakup and its suppression for increasing pulse intensity in good agreement with calculations based on the semiconductor Maxwell-Bloch equations. For highly nonlinear excitation, pulse compression is observed which is strongly enhanced by the additional contribution of self-phase modulation in the barrier and substrate material.}}, author = {{Nielsen, N. C. and Kuhl, J. and Schaarschmidt, M. and Förstner, Jens and Knorr, A. and Koch, S. W. and Gibbs, H. M. and Khitrova, G. and Giessen, H.}}, issn = {{1610-1634}}, journal = {{physica status solidi (c)}}, keywords = {{tet_topic_qw}}, number = {{5}}, pages = {{1484--1487}}, publisher = {{Wiley}}, title = {{{Pulse propagation in Bragg-resonant multiple quantum wells: from pulse breakup to compression}}}, doi = {{10.1002/pssc.200303207}}, year = {{2003}}, } @article{4292, abstract = {{We outline a theoretical description of the absorption linewidth of quantum well intersubband transitions by solving Maxwell’s equations for a non-local susceptibility including many particle effects. We show that the intersubband absorption results from a complex interplay between mean-field effects, dephasing contributions and light propagation effects, all being very sensitive to subband dispersion.}}, author = {{Waldmüller, Inès and Woerner, Michael and Förstner, Jens and Knorr, Andreas}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{tet_topic_qw}}, number = {{3}}, pages = {{474--477}}, publisher = {{Wiley}}, title = {{{Theory of the lineshape of quantum well intersubband transitions: optical dephasing and light propagation effects}}}, doi = {{10.1002/pssb.200303165}}, volume = {{238}}, year = {{2003}}, } @article{4294, abstract = {{The phonon-induced dephasing dynamics of semiconductor quantum dots during nonlinear optical excitation is studied using quantum kinetic equations. We find that despite the decoherence process Rabi oscillations occur even for relatively long pulse durations and that their signatures in pump-probe experiments only get suppressed for high input pulse areas.}}, author = {{Förstner, Jens and Weber, Carsten and Danckwerts, Juliane and Knorr, Andreas}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{tet_topic_qd}}, number = {{3}}, pages = {{419--422}}, publisher = {{Wiley}}, title = {{{Phonon-induced damping of Rabi oscillations in semiconductor quantum dots}}}, doi = {{10.1002/pssb.200303155}}, volume = {{238}}, year = {{2003}}, } @inproceedings{4296, abstract = {{A non-Markovian quantum kinetic theory of the coupled electron-phonon system in semiconductor quantum dots is used to analyze the nonlinear dipole decoherence and light propagation dynamics for arbitrary pulse strengths and lengths.}}, author = {{Förstner, Jens and Weber, C. and Danckwerts, J. and Knorr, A.}}, booktitle = {{Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.}}, isbn = {{1557527490}}, keywords = {{tet_topic_qd}}, location = {{Baltimore, MD, USA, USA }}, publisher = {{IEEE}}, title = {{{Damping of electron density Rabi-oscillations and self-induced-transparency in semiconductor quantum dots}}}, doi = {{10.1109/qels.2003.238120}}, year = {{2003}}, } @inproceedings{4298, abstract = {{The linewidth of intersubband transitions resulting from simultaneous action of many-body contributions and radiative damping is analyzed. The processes are non-additive and a self-consistent treatment is necessary to explain recent experiments.}}, author = {{Waldmuller, I. and Förstner, Jens and Knorr, A. and Woerner, M. and Reimann, K. and Kaindl, R.A. and Hey, R. and Ploog, K.H.}}, booktitle = {{Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.}}, isbn = {{1557527490}}, keywords = {{tet_topic_qw}}, location = {{ Baltimore, MD, (USA)}}, publisher = {{IEEE}}, title = {{{Correlated influence of carrier-carrier/carrier-phonon interaction and radiative damping on semiconductor intersubband transitions}}}, doi = {{10.1109/qels.2003.238217}}, year = {{2003}}, } @article{4322, abstract = {{We present the experimental observation and the theoretical modelling of self-induced transparency signatures such as nonlinear transmission, pulse retardation and reshaping for subpicosecond pulse propagation in a 2 mm-long InGaAs quantum-dot ridge waveguide at 10 K. The measurements were obtained using a cross-correlation frequency resolved optical gating technique which allows us to retrieve the field amplitude of the propagating pulses.}}, author = {{Schneider, S. and Borri, P. and Langbein, W. and Woggon, U. and Förstner, Jens and Knorr, A. and Sellin, R. L. and Ouyang, D. and Bimberg, D.}}, issn = {{1610-1634}}, journal = {{physica status solidi (c)}}, keywords = {{tet_topic_qd}}, number = {{5}}, pages = {{1548--1551}}, publisher = {{Wiley}}, title = {{{Self-induced transparency in InGaAs quantum dot waveguides}}}, doi = {{10.1002/pssc.200303228}}, year = {{2003}}, } @article{671, author = {{Förstner, Jens and Weber, C. and Danckwerts, J. and Knorr, A.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{tet_topic_qd}}, number = {{12}}, pages = {{127401}}, publisher = {{American Physical Society (APS)}}, title = {{{Phonon-Assisted Damping of Rabi Oscillations in Semiconductor Quantum Dots}}}, doi = {{10.1103/physrevlett.91.127401}}, volume = {{91}}, year = {{2003}}, } @article{4300, abstract = {{The occurrence of non-Lorentzian lineshapes is analyzed for a variety of nanooptical semiconductor systems such as quantum wells and quantum dots. Their origin is traced back to light–matter interaction (light propagation) and many-particle correlations (electron–electron and electron– phonon interaction).}}, author = {{Förstner, Jens and Ahn, K.J. and Danckwerts, J. and Schaarschmidt, M. and Waldmüller, I. and Weber, C. and Knorr, A.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{tet_topic_polariton}}, number = {{1}}, pages = {{155--165}}, publisher = {{Wiley}}, title = {{{Light Propagation- and Many-particle-induced Non-Lorentzian Lineshapes in Semiconductor Nanooptics}}}, doi = {{10.1002/1521-3951(200211)234:1<155::aid-pssb155>3.0.co;2-r}}, volume = {{234}}, year = {{2002}}, } @inproceedings{4305, abstract = {{On the basis of a density matrix approach including electron-electron scattering, a detailed analysis of the temporal dynamics and the dephasing process after optical excitation in intersubband emitters is presented for a wide range of parameters. }}, author = {{Waldmüller, Ines and Förstner, Jens and Knorr, Andreas}}, booktitle = {{Nonlinear Optics: Materials, Fundamentals and Applications}}, isbn = {{1557527210}}, keywords = {{tet_topic_qw}}, publisher = {{OSA}}, title = {{{Theory of ultrafast dynamics and lineshape of semiconductor quantum well intersubband emitters}}}, doi = {{10.1364/nlo.2002.we34}}, year = {{2002}}, } @article{4306, abstract = {{The coherent exciton-light coupling in pulse propagation experiments on the A-exciton resonance in bulk CdSe is investigated over a broad intensity range. At low light intensities, polariton propagation beats due to interference between excited states on both polariton branches are observed. In an intermediate intensity regime, the temporal polariton beating is suppressed in consequence of exciton-exciton interaction. At the highest light intensities, self-induced transmission and multiple pulse breakup are identified as a signature for carrier density Rabi flopping. Exciton-phonon scattering is shown to gradually eliminate coherent nonlinear propagation effects due to enhanced dephasing of the excitonic polarization. Calculations using the semiconductor Maxwell-Bloch equations are in qualitative agreement with the experimental data.}}, author = {{Nielsen, N. C. and Linden, S. and Kuhl, J. and Förstner, Jens and Knorr, A. and Koch, S. W. and Giessen, H.}}, issn = {{0163-1829}}, journal = {{Physical Review B}}, keywords = {{tet_topic_polariton}}, number = {{24}}, pages = {{245202--245202--10}}, publisher = {{American Physical Society (APS)}}, title = {{{Coherent nonlinear pulse propagation on a free-exciton resonance in a semiconductor}}}, doi = {{10.1103/physrevb.64.245202}}, volume = {{64}}, year = {{2002}}, } @article{4308, abstract = {{Features reminiscent of spectral hole burning in a homogeneous line are predicted to result from the interaction of small area pulses with the semiconductor exciton resonance. The small area pulses may be designed through pulse shaping or evolve naturally in bulk semiconductors via polaritonic effects. The spectral features exhibit signatures that are characteristic for the underlying material nonlinearity and should occur in any system with isolated spectral resonances and coherent nonlinearities.}}, author = {{Förstner, Jens and Knorr, A. and Koch, S. W.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{tet_topic_polariton}}, number = {{3}}, pages = {{476--479}}, publisher = {{American Physical Society (APS)}}, title = {{{Nonlinear Pulse Propagation in Semiconductors: Hole Burning within a Homogeneous Line}}}, doi = {{10.1103/physrevlett.86.476}}, volume = {{86}}, year = {{2002}}, } @article{4310, abstract = {{Nonlinear propagation of optical pulses through an extended bulk semiconductor is investigated using the coupled semiconductor Maxwell‐Bloch equations including excitation induced correlations. For short pulse excitation around the exciton resonance, the theory describes the development of polariton beats and their suppression at increasing input pulse intensities due to the coupling of single exciton states to the Coulomb‐correlated continuum of two‐exciton states. A comparison of the theoretical results with experimental observations for CdSe bulk material is presented.}}, author = {{Förstner, Jens and Knorr, A. and Kuckenburg, S. and Meier, Torsten and Koch, S.W. and Giessen, H. and Linden, S. and Kuhl, J.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{tet_topic_polariton}}, number = {{1}}, pages = {{453--457}}, publisher = {{Wiley}}, title = {{{Nonlinear Polariton Pulse Propagation in Bulk Semiconductors}}}, doi = {{10.1002/1521-3951(200009)221:1<453::aid-pssb453>3.0.co;2-q}}, volume = {{221}}, year = {{2002}}, }