@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}},
}

@article{1734,
  author       = {{Zentgraf, Thomas and Zhang, Shuang and Oulton, Rupert F. and Zhang, Xiang}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{19}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Ultranarrow coupling-induced transparency bands in hybrid plasmonic systems}}},
  doi          = {{10.1103/physrevb.80.195415}},
  volume       = {{80}},
  year         = {{2009}},
}

@article{1735,
  author       = {{Oulton, Rupert F. and Sorger, Volker J. and Zentgraf, Thomas and Ma, Ren-Min and Gladden, Christopher and Dai, Lun and Bartal, Guy and Zhang, Xiang}},
  issn         = {{0028-0836}},
  journal      = {{Nature}},
  number       = {{7264}},
  pages        = {{629--632}},
  publisher    = {{Springer Nature}},
  title        = {{{Plasmon lasers at deep subwavelength scale}}},
  doi          = {{10.1038/nature08364}},
  volume       = {{461}},
  year         = {{2009}},
}

@article{1736,
  author       = {{Valentine, Jason and Li, Jensen and Zentgraf, Thomas and Bartal, Guy and Zhang, Xiang}},
  issn         = {{1476-1122}},
  journal      = {{Nature Materials}},
  number       = {{7}},
  pages        = {{568--571}},
  publisher    = {{Springer Nature}},
  title        = {{{An optical cloak made of dielectrics}}},
  doi          = {{10.1038/nmat2461}},
  volume       = {{8}},
  year         = {{2009}},
}

@article{7973,
  author       = {{Buchholz, S. S. and Fischer, S. F. and Kunze, U. and Reuter, Dirk and Wieck, A. D.}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  number       = {{2}},
  publisher    = {{AIP Publishing}},
  title        = {{{Nonlocal Aharonov–Bohm conductance oscillations in an asymmetric quantum ring}}},
  doi          = {{10.1063/1.3069281}},
  volume       = {{94}},
  year         = {{2009}},
}

@article{4553,
  abstract     = {{We present results on ferroelectric micro-domains obtained by confocal second harmonic microscopy. The high potential of this technique is demonstrated by imaging periodic ferroelectric domain structures in the surface of planar X-cut lithium niobate (LN) and in the body of ridges fabricated by plasma etching on X-cut LN as well. In both cases the measured second harmonic signal reveals a strong contrast between inverted and non-inverted domain sections. This enabled a depth-resolved non-destructive tomography of micro-domains in ridge structures in all three dimensions.}},
  author       = {{Berth, Gerhard and Wiedemeier, Volker and Hüsch, Klaus-Peter and Gui, Li and Hu, Hui and Sohler, Wolfgang and Zrenner, Artur}},
  issn         = {{0015-0193}},
  journal      = {{Ferroelectrics}},
  keywords     = {{Nonlinear microscopy, ferroelectric micro-domains, confocal imaging, LiNbO3}},
  number       = {{1}},
  pages        = {{132--141}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Imaging of Ferroelectric Micro-Domains in X-Cut Lithium Niobate by Confocal Second Harmonic Microscopy}}},
  doi          = {{10.1080/00150190902993267}},
  volume       = {{389}},
  year         = {{2009}},
}

@article{7497,
  author       = {{Mehta, M. and Ruth, M. and Piegdon, K. A. and Krix, D. and Nienhaus, H. and Meier, Cedrik}},
  issn         = {{1071-1023}},
  journal      = {{Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures}},
  number       = {{5}},
  publisher    = {{American Vacuum Society}},
  title        = {{{Inductively coupled plasma reactive ion etching of bulk ZnO single crystal and molecular beam epitaxy grown ZnO films}}},
  doi          = {{10.1116/1.3186528}},
  volume       = {{27}},
  year         = {{2009}},
}

@article{7498,
  author       = {{Lei, Wen and Notthoff, Christian and Offer, Matthias and Meier, Cedrik and Lorke, Axel and Jagadish, Chennupati and Wieck, Andreas D.}},
  issn         = {{0884-2914}},
  journal      = {{Journal of Materials Research}},
  number       = {{07}},
  pages        = {{2179--2184}},
  publisher    = {{Cambridge University Press (CUP)}},
  title        = {{{Electron energy structure of self-assembled In(Ga)As nanostructures probed by capacitance-voltage spectroscopy and one-dimensional numerical simulation}}},
  doi          = {{10.1557/jmr.2009.0293}},
  volume       = {{24}},
  year         = {{2009}},
}

@article{7499,
  author       = {{Huba, K. and Krix, D. and Meier, Cedrik and Nienhaus, H.}},
  issn         = {{0734-2101}},
  journal      = {{Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films}},
  number       = {{4}},
  pages        = {{889--894}},
  publisher    = {{American Vacuum Society}},
  title        = {{{Ultrathin K∕p-Si(001) Schottky diodes as detectors of chemically generated hot charge carriers}}},
  doi          = {{10.1116/1.3100218}},
  volume       = {{27}},
  year         = {{2009}},
}

@article{8578,
  author       = {{Wilde, M. A. and Reuter, Dirk and Heyn, Ch. and Wieck, A. D. and Grundler, D.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Inversion-asymmetry-induced spin splitting observed in the quantum oscillatory magnetization of a two-dimensional electron system}}},
  doi          = {{10.1103/physrevb.79.125330}},
  year         = {{2009}},
}

@article{8579,
  author       = {{Buchholz, S. S. and Fischer, S. F. and Kunze, U. and Reuter, Dirk and Wieck, A. D.}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  title        = {{{Nonlocal Aharonov–Bohm conductance oscillations in an asymmetric quantum ring}}},
  doi          = {{10.1063/1.3069281}},
  year         = {{2009}},
}

@article{8580,
  author       = {{Blokland, J. H. and Bozkurt, M. and Ulloa, J. M. and Reuter, Dirk and Wieck, A. D. and Koenraad, P. M. and Christianen, P. C. M. and Maan, J. C.}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  title        = {{{Ellipsoidal InAs quantum dots observed by cross-sectional scanning tunneling microscopy}}},
  doi          = {{10.1063/1.3072366}},
  year         = {{2009}},
}

@article{8581,
  author       = {{Greilich, A. and Spatzek, S. and Yugova, I. A. and Akimov, I. A. and Yakovlev, D. R. and Efros, Al. L. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Collective single-mode precession of electron spins in an ensemble of singly charged (In,Ga)As/GaAs quantum dots}}},
  doi          = {{10.1103/physrevb.79.201305}},
  year         = {{2009}},
}

@article{8582,
  author       = {{Greilich, A. and Economou, Sophia E. and Spatzek, S. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Reinecke, T. L. and Bayer, M.}},
  issn         = {{1745-2473}},
  journal      = {{Nature Physics}},
  pages        = {{262--266}},
  title        = {{{Ultrafast optical rotations of electron spins in quantum dots}}},
  doi          = {{10.1038/nphys1226}},
  year         = {{2009}},
}

@article{8583,
  author       = {{Yugova, I. A. and Sokolova, A. A. and Yakovlev, D. R. and Greilich, A. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Long-Term Hole Spin Memory in the Resonantly Amplified Spin Coherence ofInGaAs/GaAsQuantum Well Electrons}}},
  doi          = {{10.1103/physrevlett.102.167402}},
  year         = {{2009}},
}

@article{8584,
  author       = {{Wilde, M. A. and Reuter, Dirk and Heyn, Ch. and Wieck, A. D. and Grundler, D.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Inversion-asymmetry-induced spin splitting observed in the quantum oscillatory magnetization of a two-dimensional electron system}}},
  doi          = {{10.1103/physrevb.79.125330}},
  year         = {{2009}},
}

@article{8585,
  author       = {{Marquardt, B. and Geller, M. and Lorke, A. and Reuter, Dirk and Wieck, A. D.}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  title        = {{{Using a two-dimensional electron gas to study nonequilibrium tunneling dynamics and charge storage in self-assembled quantum dots}}},
  doi          = {{10.1063/1.3175724}},
  year         = {{2009}},
}

@article{8586,
  author       = {{Völk, S. and Wixforth, A. and Reuter, Dirk and Wieck, A. D. and Ebbecke, J.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Conversion of bound excitons to free excitons by surface acoustic waves}}},
  doi          = {{10.1103/physrevb.80.165307}},
  year         = {{2009}},
}