@inproceedings{4184,
  abstract     = {{We have experimentally investigated injection currents generated by all-optical excitation of GaAs/AlGaAs quantum wells excited with 130 fs optical pulses. The currents have been detected via free-space THz experiments at room temperature. Our experiments prove that Coulomb effects strongly influence injection currents. This becomes most prominently visible when exciting light-hole exciton transitions. At this photon energy we observe a pronounced phase shift of the current transients which is due to oppositely oriented heavy-hole and light-hole type contributions. We are currently developing a microscopic theory based on a 14×14 k.p model in combination with the semiconductor Bloch equations to describe the observed features quantitatively. The combined theoretical and experimental approach will allow us to analyze the influence of the bandstructure and interaction effects on the injection current amplitude and current dynamics.}},
  author       = {{Bieler, M. and Pierz, K. and Siegner, U. and Dawson, P. and Duc, H. T. and Förstner, Jens and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII}},
  editor       = {{Tsen, Kong-Thon and Song, Jin-Joo and Betz, Markus and Elezzabi, Abdulhakem Y.}},
  keywords     = {{tet_topic_qw}},
  location     = {{San Jose (California / USA)}},
  pages        = {{721404--721404--13}},
  publisher    = {{SPIE}},
  title        = {{{Generation of injection currents in (110)-oriented GaAs quantum wells: experimental observation and development of a microscopic theory}}},
  doi          = {{10.1117/12.811841}},
  volume       = {{7214}},
  year         = {{2009}},
}

@inproceedings{44104,
  abstract     = {{The paper presents a theoretical analysis of the nonlinear THz response from the internal transitions of coherent and incoherent excitons based on the formulated microscopic THz theory. Moreover, the response of unexcited semiconductors to extremely intense THz fields is investigated .The intersubband transitions of optically excited quantum wells using linear THz spectroscopy is also studied. The computed differential transmission shows a characteristic Fano-like line shape of the intersubband resonance. The pure intersubband contribution is given by a simple Lorentzian. Applying the microscopic theory, the Fano features of the total response can be attributed to the phase-sensitive superposition of the intersubband transitions and the ponderomotive contribution. These results are in excellent agreement with recent experiments.}},
  author       = {{Meier, Torsten and Koch, S.W. and Kira, M. and Steiner, J.T. and Golde, D.}},
  booktitle    = {{ CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference}},
  isbn         = {{978-1-4244-4079-5}},
  location     = {{Munich, Germany}},
  publisher    = {{IEEE}},
  title        = {{{Microscopic theory of the linear and nonlinear Terahertz response of semiconductors}}},
  doi          = {{10.1109/CLEOE-EQEC.2009.5192555}},
  year         = {{2009}},
}

@inproceedings{44105,
  abstract     = {{By combining coherent control schemes and photoelectron spectroscopy it is possible to generate ultrafast current pulses at surfaces and in solids and to detect their decay directly in momentum space with femtosecond time resolution.}},
  author       = {{Meier, Torsten and Koch, S.W. and Rohleder, M. and Gudde, J. and Hofer, U.}},
  booktitle    = {{Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference}},
  issn         = {{2160-9004}},
  location     = {{Baltimore, MD, USA}},
  pages        = {{1--2}},
  publisher    = {{IEEE}},
  title        = {{{Ultrafast coherent photoelectron emission effects and their application for time-domain studies of current transport}}},
  doi          = {{10.1364/IQEC.2009.IThI5}},
  year         = {{2009}},
}

@article{24983,
  abstract     = {{The recently developed two-dimensional Fourier-Transform-Spectroscopy (2DFTS) in the optical regime has been established as an elegant experiment, which has manifold of applications in the investigation of semiconductor nanostructures. Here we focus on the real and imaginary part 2DFT spectra. As predicted recently, using rephasing and non-rephasing modes, we are able to determine the homogeneous and inhomogeneous broadenings of coupled excitonic resonances even for weak disorder where photon-echo data are not useful. Computed real and imaginary parts of the 2DFTS for rephasing and non-rephasing modes are compared with experimental data of a GaAs quantum well. It is demonstrated, that phase sensitive data for the rephasing and non-rephasing modes are able to accurately provide the disorder induced broadening in a complex coupled system for each transition separately. }},
  author       = {{Kuznetsova, Irina and Thomas, Peter and Meier, Torsten and Zhang, Tianhao and Cundiff, Steven T.}},
  issn         = {{1610-1634}},
  journal      = {{physica status solidi (c)}},
  number       = {{2}},
  pages        = {{445--448}},
  publisher    = {{WILEY‐VCH Verlag}},
  title        = {{{Determination of homogeneous and inhomogeneous broadenings of quantum-well excitons by 2DFTS: An experiment-theory comparison}}},
  doi          = {{10.1002/pssc.200880302}},
  volume       = {{6}},
  year         = {{2009}},
}

@article{24982,
  abstract     = {{A microscopic analysis of the emitted radiation of a semiconductor nanostructure after excitation with an extremely intense ultrashort laser pulse is presented. It is shown that the extreme nonlinear optical response is not sufficiently described by pure interband transitions but one has to include intraband effects as well.
Numerical solutions of extended Bloch equations that include the coupled inter- and intraband dynamics are presented. For large excitation intensities, the intraband effects strongly modify the polarization dynamics and lead to a strong enhancement of high-harmonic generation compared to pure interband dynamics.}},
  author       = {{Golde, Daniel and Meier, Torsten and Koch, Stephan W.}},
  issn         = {{1610-1634}},
  journal      = {{physica status solidi (c)}},
  number       = {{2}},
  pages        = {{420--423}},
  publisher    = {{WILEY‐VCH Verlag}},
  title        = {{{Microscopic analysis of high-harmonic generation in semiconductor nanostructures}}},
  doi          = {{10.1002/pssc.200880309}},
  volume       = {{6}},
  year         = {{2009}},
}

@article{44106,
  author       = {{Meier, Torsten and Michler, Peter}},
  journal      = {{physica status solidi c}},
  number       = {{2}},
  pages        = {{379--380}},
  publisher    = {{WILEY‐VCH Verlag}},
  title        = {{{Preface}}},
  doi          = {{10.1002/pssc.200960045}},
  volume       = {{6}},
  year         = {{2009}},
}

@inproceedings{44068,
  abstract     = {{The band structure and wave functions of GaAs quantum wells are computed via k.p band structure theory including anisotropy and spin splitting. Using these results, the process of generating photocurrents by optical excitation is analyzed. Depending on the symmetry of the material, the direction of the laser beam, and the polarization direction of the light field/s, one can coherently generate charge and/or spin photocurrents on ultrashort time scales. The direction, the strength, and the dynamics of these photocurrents are computed and discussed.}},
  author       = {{Meier, Torsten and Duc, Huynh Thanh and Foerstner, Jens}},
  booktitle    = {{DPG Spring meeting 2009}},
  issn         = {{0420-0195}},
  location     = {{Dresden, Germany}},
  number       = {{5}},
  title        = {{{Photo-and spin current generation and dynamics in semiconductor nanostructures}}},
  volume       = {{44}},
  year         = {{2009}},
}

@phdthesis{45297,
  author       = {{Riese, Josef}},
  publisher    = {{Logos Verlag}},
  title        = {{{Professionelles Wissen und professionelle Handlungskompetenz von (angehenden) Physiklehrkräften}}},
  year         = {{2009}},
}

@article{45295,
  author       = {{Riese, Josef and Reinhold, Peter}},
  journal      = {{Lehrerbildung auf dem Prüfstand}},
  number       = {{1}},
  pages        = {{104--125}},
  title        = {{{Fachbezogene Kompetenzmessung und Kompetenzentwicklung bei Lehramtsstudierenden der Physik im Vergleich verschiedener Studiengänge}}},
  volume       = {{2}},
  year         = {{2009}},
}

@inproceedings{45544,
  author       = {{Riese, Josef and Reinhold, Peter}},
  booktitle    = {{Chemie- und Physikdidaktik für die Lehramtsausbildung. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Schwäbisch Gmünd 2008}},
  editor       = {{Höttecke, Dietmar}},
  pages        = {{125--127}},
  title        = {{{Struktur und Entwicklung professionellen Wissens angehender Physiklehrer}}},
  year         = {{2009}},
}

@inproceedings{45543,
  author       = {{Riese, Josef and Reinhold, Peter}},
  booktitle    = {{NARST conference 2009, Conference Proceedings. Garden Grove}},
  editor       = {{Czerniak, Charlene M.}},
  title        = {{{Structure and Development of Physics Student Teachers’ Professional Action Competence}}},
  year         = {{2009}},
}

@article{15847,
  author       = {{Kwong, N. H. and Schumacher, Stefan and Binder, R.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Electron-Spin Beat Susceptibility of Excitons in Semiconductor Quantum Wells}}},
  doi          = {{10.1103/physrevlett.103.056405}},
  year         = {{2009}},
}

@article{13580,
  author       = {{Wippermann, S. and Schmidt, Wolf Gero and Thissen, P. and Grundmeier, Guido}},
  issn         = {{1862-6351}},
  journal      = {{physica status solidi (c)}},
  number       = {{2}},
  pages        = {{137--140}},
  title        = {{{Dissociative and molecular adsorption of water onα-Al2O3(0001)}}},
  doi          = {{10.1002/pssc.200982423}},
  volume       = {{7}},
  year         = {{2009}},
}

@article{13583,
  author       = {{Scholle, A. and Greulich-Weber, S. and Rauls, E. and Schmidt, Wolf Gero and Gerstmann, Uwe}},
  issn         = {{0921-4526}},
  journal      = {{Physica B: Condensed Matter}},
  pages        = {{4742--4744}},
  title        = {{{Vacancy clusters created via room temperature irradiation in 6H-SiC}}},
  doi          = {{10.1016/j.physb.2009.08.123}},
  volume       = {{404}},
  year         = {{2009}},
}

@article{13579,
  author       = {{Sanna, Simone and Gavrilenko, Alexander V. and Schmidt, Wolf Gero}},
  issn         = {{1862-6351}},
  journal      = {{physica status solidi (c)}},
  number       = {{2}},
  pages        = {{145--148}},
  title        = {{{Ab initioinvestigation of the LiNbO3(0001) surface}}},
  doi          = {{10.1002/pssc.200982456}},
  volume       = {{7}},
  year         = {{2009}},
}

@article{13577,
  author       = {{Blankenburg, S. and Rauls, E. and Schmidt, Wolf Gero}},
  issn         = {{1862-6351}},
  journal      = {{physica status solidi (c)}},
  number       = {{2}},
  pages        = {{153--156}},
  title        = {{{The physics of highly ordered molecular rows}}},
  doi          = {{10.1002/pssc.200982459}},
  volume       = {{7}},
  year         = {{2009}},
}

@article{13578,
  author       = {{Sanna, Simone and Gavrilenko, Alexander V. and Schmidt, Wolf Gero}},
  issn         = {{1862-6351}},
  journal      = {{physica status solidi (c)}},
  pages        = {{145--148}},
  title        = {{{Ab initioinvestigation of the LiNbO3(0001) surface}}},
  doi          = {{10.1002/pssc.200982456}},
  year         = {{2009}},
}

@article{13576,
  author       = {{Blankenburg, S. and Rauls, E. and Schmidt, Wolf Gero}},
  issn         = {{1862-6351}},
  journal      = {{physica status solidi (c)}},
  pages        = {{153--156}},
  title        = {{{The physics of highly ordered molecular rows}}},
  doi          = {{10.1002/pssc.200982459}},
  year         = {{2009}},
}

@article{13665,
  author       = {{Landmann, M. and Rauls, E. and Schmidt, Wolf Gero}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{4}},
  title        = {{{First-principles calculations of clean Au(110) surfaces and chemisorption of atomic oxygen}}},
  doi          = {{10.1103/physrevb.79.045412}},
  volume       = {{79}},
  year         = {{2009}},
}

@article{13662,
  author       = {{Blankenburg, S and Schmidt, Wolf Gero}},
  issn         = {{0953-8984}},
  journal      = {{Journal of Physics: Condensed Matter}},
  title        = {{{Glutamic acid adsorbed on Ag(110): direct and indirect molecular interactions}}},
  doi          = {{10.1088/0953-8984/21/18/185001}},
  volume       = {{21}},
  year         = {{2009}},
}