@article{4177,
  abstract     = {{Excitonic spectra of weakly disordered semiconductor heterostructures are simulated on the basis of a
one-dimensional tight-binding model. The influence of the length scale of weak disorder in quantum wells on
the redshift of the excitonic peak and its linewidth is studied. By calculating two-dimensional Fouriertransform
spectra we are able to determine the contribution of disorder to inhomogeneous and also to homogeneous
broadenings separately. This disorder-induced dephasing is related to a Fano-type coupling and leads
to contributions to the homogeneous linewidth that depends on energy within the inhomogeneously broadened
line. The model includes heavy- and light-hole excitons and yields smaller inhomogeneous broadening for the
light-hole exciton if compared to the heavy-hole exciton, which agrees qualitatively with the experiment.}},
  author       = {{Kuznetsova, I. and Gőgh, N. and Förstner, Jens and Meier, Torsten and Cundiff, S. T. and Varga, I. and Thomas, P.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  keywords     = {{tet_topic_qw}},
  number       = {{7}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Modeling excitonic line shapes in weakly disordered semiconductor nanostructures}}},
  doi          = {{10.1103/physrevb.81.075307}},
  volume       = {{81}},
  year         = {{2010}},
}

@article{4125,
  abstract     = {{We numerically investigate the behavior of Whispering Gallery Modes (WGMs) in circularly shaped resonators like microdisks, with diameters in the range of optical vacuum wavelengths. The microdisk is embedded in an uniaxial anisotropic dielectric environment. By changing the optical anisotropy, one obtains spectral tunability of the optical modes. The degree of tunability strongly depends on the radial (azimuthal) mode order M (N). As the modes approach each other spectrally, anticrossing is observed, leading to a rearrangement of the optical states.}},
  author       = {{Declair, S. and Meier, Cedrik and Meier, Torsten and Förstner, Jens}},
  issn         = {{1569-4410}},
  journal      = {{Photonics and Nanostructures - Fundamentals and Applications}},
  keywords     = {{tet_topic_microdisk}},
  number       = {{4}},
  pages        = {{273--277}},
  publisher    = {{Elsevier BV}},
  title        = {{{Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment}}},
  doi          = {{10.1016/j.photonics.2010.03.002}},
  volume       = {{8}},
  year         = {{2010}},
}

@article{4547,
  abstract     = {{The coherent state manipulation of single quantum systems is a fundamental requirement for the implementation of quantum information processors. Exciton qubits are of particular interest for coherent optoelectronic applications, in particular due to their excellent coupling to photons. Until now, coherent manipulations of exciton qubits in semiconductor quantum dots have been performed predominantly by pulsed laser fields. Coherent control of the population of excitonic states with a single laser pulse, observed by Rabi oscillations, has been demonstrated by several groups using different techniques1,2,3. By using two laser pulses, more general state control can be achieved4, and coupling of two excitons has been reported5,6. Here, we present a conceptually new approach for implementing the coherent control of an exciton two-level system (qubit) by means of a time-dependent electric interaction. The new scheme makes use of an optical clock signal and a synchronous electric gate signal, which controls the coherent manipulation.}},
  author       = {{Michaelis de Vasconcellos, S. and Gordon, S. and Bichler, M. and Meier, Torsten and Zrenner, Artur}},
  issn         = {{1749-4885}},
  journal      = {{Nature Photonics}},
  number       = {{8}},
  pages        = {{545--548}},
  publisher    = {{Springer Nature}},
  title        = {{{Coherent control of a single exciton qubit by optoelectronic manipulation}}},
  doi          = {{10.1038/nphoton.2010.124}},
  volume       = {{4}},
  year         = {{2010}},
}

@article{4123,
  abstract     = {{GaAs-based semiconductor microdisks with high quality whispering gallery modes (Q44000) have been fabricated.A layer of self-organized InAs quantumdots (QDs) served as a light source to feed the optical modes at room temperature. In order to achieve frequency tuning of the optical modes, the microdisk devices have been immersed in 4 – cyano – 4´-pentylbiphenyl (5CB), a liquid crystal(LC) with a nematic phase below the clearing temperature of  TC≈34°C .We have studied the device performance in the temperature rangeof T=20-50°C, in order to investigate the influence of the nematic–isotropic phase transition on the optical modes. Moreover,we havea pplied an AC electric field to the device,which leads in the nematic phase to a reorientation of the anisotropic dielectric tensor of the liquid crystal.This electrical anisotropy can be used to achieve electrical tunability of the optical modes.Using the finite-difference time domain (FDTD) technique with an anisotropic material model, we are able to describe the influence of the liquid crystal qualitatively.}},
  author       = {{Piegdon, Karoline A. and Offer, Matthias and Lorke, Axel and Urbanski, Martin and Hoischen, Andreas and Kitzerow, Heinz-Siegfried and Declair, Stefan and Förstner, Jens and Meier, Torsten and Reuter, Dirk and Wieck, Andreas D. and Meier, Cedrik}},
  issn         = {{1386-9477}},
  journal      = {{Physica E: Low-dimensional Systems and Nanostructures}},
  keywords     = {{tet_topic_qd, tet_topic_microdisk}},
  number       = {{10}},
  pages        = {{2552--2555}},
  publisher    = {{Elsevier BV}},
  title        = {{{Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator}}},
  doi          = {{10.1016/j.physe.2009.12.051}},
  volume       = {{42}},
  year         = {{2010}},
}

@article{4169,
  abstract     = {{It is demonstrated that valence-band mixing in GaAs quantum wells tremendously modifies electronic
transport. A coherent control scheme in which ultrafast currents are optically injected into undoped GaAs
quantum wells upon excitation with femtosecond laser pulses is employed. An oscillatory dependence of
the injection current amplitude and direction on the excitation photon energy is observed. A microscopic
theoretical analysis shows that this current reversal is caused by the coupling of the light- and heavy-hole
bands and that the hole currents dominate the overall current response. These surprising consequences of
band mixing illuminate fundamental physics as they are unique for experiments which are able to monitor
electronic transport resulting from carriers with relatively large momenta.}},
  author       = {{Priyadarshi, S. and Racu, A. M. and Pierz, K. and Siegner, U. and Bieler, M. and Duc, H. T. and Förstner, Jens and Meier, Torsten}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  keywords     = {{tet_topic_qw}},
  number       = {{21}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Reversal of Coherently Controlled Ultrafast Photocurrents by Band Mixing in Undoped GaAs Quantum Wells}}},
  doi          = {{10.1103/physrevlett.104.217401}},
  volume       = {{104}},
  year         = {{2010}},
}

@inproceedings{4167,
  abstract     = {{The electromagnetic field in the vicinity of sharp edges needs a special treatment in numeric calculation whenever accurate, fast converging results are necessary. One of the fundamental works concerning field singularities has been proposed in 1972 [1] and states that the electromagnetic energy density must be integrable over any finite
domain, even if this domain contains singularities. It is shown, that the magnetic field H(, ϕ) and electric field E(, ϕ) are proportional to ∝ (t−1) for  → 0. The variable  is the distance to the edge and t has to fulfill the integrability condition and thus is restricted to 0 < t < 1. This result is often used to reduce the error corresponding to the singularity without increasing the numerical effort [2 - 5]. For this purpose, a correction factor K is estimated by inserting the proportionality into the wave equation. It is shown, that this method improves the accuracy of the result significantly, however the order of convergence is often not studied. In [4] a method to modify the material parameters in order to use analytic results to improve the numeric calculation is presented. In this contribution we will - inspired by the scheme given in [4] - develop a new method to estimate a correction factor for perfect conducting materials (PEC) and demonstrate the improvement of the results compared to the standard edge correction. Therefore analytic results (comparable to [1]) are consequently merged with the scheme in [4]. The main goal of this work is the calculation of the second harmonic generation (SHG) in the wave response of so-called metamaterials [6]. Frequently these structures
contain sharp metallic edges with field singularities at the interfaces which have a strong impact on the SHG signals. Thus, an accurate simulation of singularities is highly important. However, the following approach can also be applied to many other setups, and one of them is shown in the example below.}},
  author       = {{Classen, C and Förstner, Jens and Meier, Torsten and Schuhmann, R}},
  booktitle    = {{2010 IEEE Antennas and Propagation Society International Symposium}},
  isbn         = {{9781424449675}},
  keywords     = {{tet_topic_numerics}},
  location     = {{Toronto, ON, Canada}},
  publisher    = {{IEEE}},
  title        = {{{Enhanced FDTD edge correction for nonlinear effects calculation}}},
  doi          = {{10.1109/aps.2010.5562017}},
  year         = {{2010}},
}

@article{4172,
  abstract     = {{Microdisks made from GaAs with embedded InAs quantum dots are immersed in the liquid crystal 4-cyano-4’-pentylbiphenyl (5CB). The quantum dots serve as emitters feeding the optical modes of the photonic cavity. By changing temperature, the liquid crystal undergoes a phase transition from the isotropic to the nematic state, which can be used
as an effective tuning mechanism of the photonic modes of the cavity. In the nematic state, the uniaxial electrical anisotropy of the liquid crystal molecules can be exploited for orienting the material in an electric field,
thus externally controlling the birefringence of the material. Using this effect, an electric field induced tuning of the modes is achieved. Numerical simulations using the finite-differences time-domain (FDTD) technique
employing an anisotropic dielectric medium allow to understand the alignment of the liquid crystal molecules on the surface of the microdisk resonator.}},
  author       = {{Piegdon, Karoline A. and Declair, Stefan and Förstner, Jens and Meier, Torsten and Matthias, Heiner and Urbanski, Martin and Kitzerow, Heinz-Siegfried and Reuter, Dirk and Wieck, Andreas D. and Lorke, Axel and Meier, Cedrik}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{tet_topic_qd, tet_topic_microdisk}},
  number       = {{8}},
  publisher    = {{The Optical Society}},
  title        = {{{Tuning quantum-dot based photonic devices with liquid crystals}}},
  doi          = {{10.1364/oe.18.007946}},
  volume       = {{18}},
  year         = {{2010}},
}

@inbook{32617,
  author       = {{Steigerwald, Jörn}},
  booktitle    = {{Räume des Subjekts um 1800: Zur imaginativen Selbstverortung des Individuums zwischen Spätaufklärung und Romantik}},
  editor       = {{Steigerwald, Jörn and Behrens, Rudolf}},
  publisher    = {{Harrassowitz}},
  title        = {{{Flüchtige Visionen: Charles Nodiers Les proscrits}}},
  volume       = {{2}},
  year         = {{2010}},
}

@inbook{64927,
  author       = {{Mersch, Katharina Ulrike and Wulf, Christine}},
  booktitle    = {{Klöster und Inschriften – Glaubenszeugnisse gestickt, gemalt, gehauen, graviert. Beiträge zur gleichnamigen Tagung am 30. Oktober 2009 im Kloster Lüne}},
  editor       = {{Wulf, Christine and Wehking, Sabine and Henkel, Nikolaus}},
  pages        = {{13--22}},
  title        = {{{Klöster und Inschriften. Einführung in das Tagungsthema}}},
  year         = {{2010}},
}

@misc{64954,
  author       = {{Mersch, Katharina Ulrike}},
  booktitle    = {{Niedersächsisches Jahrbuch für Landesgeschichte}},
  pages        = {{502--504}},
  title        = {{{Die Inschriften der Lüneburger Klöster. Ebstorf, Isenhagen, Lüne, Medingen, Walsrode, Wienhausen, ges. und bearb. von Sabine Wehking. Wiesbaden 2009 (Die Deutschen Inschriften 76)}}},
  volume       = {{82}},
  year         = {{2010}},
}

@article{44807,
  author       = {{Freitag, Christine and Rölker, Sarah}},
  issn         = {{0947-9732}},
  journal      = {{Tertium Comparationis 1/2010}},
  pages        = {{24--49}},
  publisher    = {{Waxmann}},
  title        = {{{Was ist eigentlich ein Kontext? Theoretische Überlegungen und empirische Annäherungen an die Frage der Kontextualisierung von Schule}}},
  year         = {{2010}},
}

@techreport{44806,
  author       = {{von Bargen, Imke and Freitag, Christine and Müller-Kohlenberg, Hildegard and Rölker, Sarah and Weizsäcker, Carolin}},
  title        = {{{Studentische Mentorinnen und Mentoren des „Balu und Du“-Projekts im Fokus der Begleit-, Handlungs- und Aktionsforschung (Präsentation)}}},
  year         = {{2010}},
}

@inproceedings{24065,
  author       = {{Pottebaum, Jens and Japs, Anna Maria and Prödel, Stephan and Koch, Rainer}},
  booktitle    = {{ISCRAM 2010 -- 7th International Conference on Information Systems for Crisis Response and Management}},
  editor       = {{French, Simon and Tomaszewski, Brian and Zobel, Chris}},
  keywords     = {{Command and control process, Command and control systems, Design and modeling, Domain ontologies, Emergency response, Fire extinguishers, Fire protection, Heterogeneous domains, Information analysis, Information sharing, Information systems, Interoperability, Ontology language, Semantic technologies, Semantic Web, Semantics}},
  title        = {{{Design and modeling of a domain ontology for fire protection}}},
  year         = {{2010}},
}