@article{4353,
  author       = {{Schumacher, Stefan and Zrenner, Artur}},
  issn         = {{0277-786X}},
  journal      = {{ULTRAFAST PHENOMENA AND NANOPHOTONICS XVII}},
  title        = {{{Two-photon physics with quantum-dot biexcitons}}},
  doi          = {{10.1117/12.2004191}},
  year         = {{2013}},
}

@article{15871,
  abstract     = {{We derive a transparent and easy-to-use analytic expression for the selection rules and the optical dipole matrix elements for carbon nanotubes of arbitrary chirality in the presence of axial magnetic fields using a single-orbital π-electron tight-binding model. From this, we calculate the linear absorption spectrum for arbitrary polarization directions of the incident light, providing insight into all optically allowed transition. We show that the transverse absorption peaks can be selectively excited with circularly polarized light and spectrally resolved in an axial magnetic field.}},
  author       = {{Liu, Hong and Schumacher, Stefan and Meier, Torsten}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{3}},
  title        = {{{Selection rules and linear absorption spectra of carbon nanotubes in axial magnetic fields}}},
  doi          = {{10.1103/physrevb.88.035429}},
  volume       = {{88}},
  year         = {{2013}},
}

@article{15870,
  author       = {{Ling, Sanliang and Schumacher, Stefan and Galbraith, Ian and Paterson, Martin J.}},
  issn         = {{1932-7447}},
  journal      = {{The Journal of Physical Chemistry C}},
  pages        = {{6889--6895}},
  title        = {{{Excited-State Absorption of Conjugated Polymers in the Near-Infrared and Visible: A Computational Study of Oligofluorenes}}},
  doi          = {{10.1021/jp401359a}},
  year         = {{2013}},
}

@article{62927,
  abstract     = {{<jats:p>To model intermolecular excitation transfer between organic chromophores in the framework of Förster theory, the interaction matrix element is needed for all relative orientations and separations of chromophores. Simulations of extended multi-chromophoric systems thus require a fast but reliable approximation scheme to calculate these dipole interactions. By means of a comparative study of the dipole approximation with quantum chemistry, we demonstrate that the usual line-dipole theory, while suitable for short molecules, breaks down for longer molecules with inter-molecular separations similar to or smaller than the length of the interacting chromophores; a limit that is typically found in conjugated polymer thin films. As a remedy, we propose an improved way of distributing the sub-dipole moments within a line which provides results in very good agreement with the quantum chemistry, and is still simple enough to be used in large scale simulations.</jats:p>}},
  author       = {{Denis, Jean-Christophe and Schumacher, Stefan and Galbraith, Ian}},
  issn         = {{0021-9606}},
  journal      = {{The Journal of Chemical Physics}},
  number       = {{22}},
  publisher    = {{AIP Publishing}},
  title        = {{{Quantitative description of interactions between linear organic chromophores}}},
  doi          = {{10.1063/1.4768244}},
  volume       = {{137}},
  year         = {{2012}},
}

@article{15869,
  author       = {{Wiebeler, Christian and Tautz, Raphael and Feldmann, Jochen and von Hauff, Elizabeth and Da Como, Enrico and Schumacher, Stefan}},
  issn         = {{1520-6106}},
  journal      = {{The Journal of Physical Chemistry B}},
  pages        = {{4454--4460}},
  title        = {{{Spectral Signatures of Polarons in Conjugated Co-polymers}}},
  doi          = {{10.1021/jp3084869}},
  year         = {{2012}},
}

@article{15872,
  author       = {{Montgomery, Neil A. and Hedley, Gordon J. and Ruseckas, Arvydas and Denis, Jean-Christophe and Schumacher, Stefan and Kanibolotsky, Alexander L. and Skabara, Peter J. and Galbraith, Ian and Turnbull, Graham A. and Samuel, Ifor D. W.}},
  issn         = {{1463-9076}},
  journal      = {{Physical Chemistry Chemical Physics}},
  title        = {{{Dynamics of fluorescence depolarisation in star-shaped oligofluorene-truxene molecules}}},
  doi          = {{10.1039/c2cp24141b}},
  year         = {{2012}},
}

@article{3974,
  abstract     = {{We study the quantum properties and statistics of photons emitted by a quantum-dot biexciton inside a cavity. In the biexciton-exciton cascade, fine-structure splitting between exciton levels degrades polarization-entanglement for the emitted pair of photons. However, here we show that the polarization-entanglement can be preserved in such a system through simultaneous emission of two degenerate photons into cavity modes tuned to half the biexciton energy. Based on detailed theoretical calculations for realistic quantum-dot and cavity parameters, we quantify the degree of achievable entanglement.}},
  author       = {{Schumacher, Stefan and Förstner, Jens and Zrenner, Artur and Florian, Matthias and Gies, Christopher and Gartner, Paul and Jahnke, Frank}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{tet_topic_qd}},
  number       = {{5}},
  pages        = {{5335--5342}},
  publisher    = {{OSA}},
  title        = {{{Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting}}},
  doi          = {{10.1364/oe.20.005335}},
  volume       = {{20}},
  year         = {{2012}},
}

@article{62929,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Two slightly different, efficient tight‐binding (TB) models for the description of the electronic properties of nitride‐based semiconductor quantum dots (QDs) have been developed and applied to the calculation of the electronic one‐particle spectrum of these structures. Using these one‐particle QD‐states, dipole and Coulomb matrix elements can be calculated, from which the optical properties of these systems can be obtained. These TB calculations have been performed for nitride‐based QDs with a cubic zincblende structure and those with a wurtzite crystal structure. In this paper, we discuss the general methodology used and the results obtained for the electronic one‐particle states and energies, for the dipole and Coulomb matrix elements, and for the excitonic optical emission and absorption spectra.</jats:p>}},
  author       = {{Schulz, S. and Mourad, D. and Schumacher, Stefan and Czycholl, G.}},
  issn         = {{0370-1972}},
  journal      = {{physica status solidi (b)}},
  number       = {{8}},
  pages        = {{1853--1866}},
  publisher    = {{Wiley}},
  title        = {{{Tight‐binding model for the electronic and optical properties of nitride‐based quantum dots}}},
  doi          = {{10.1002/pssb.201147158}},
  volume       = {{248}},
  year         = {{2011}},
}

@article{62928,
  author       = {{Montgomery, Neil A. and Denis, Jean-Christophe and Schumacher, Stefan and Ruseckas, Arvydas and Skabara, Peter J. and Kanibolotsky, Alexander and Paterson, Martin J. and Galbraith, Ian and Turnbull, Graham A. and Samuel, Ifor D. W.}},
  issn         = {{1089-5639}},
  journal      = {{The Journal of Physical Chemistry A}},
  number       = {{14}},
  pages        = {{2913--2919}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Optical Excitations in Star-Shaped Fluorene Molecules}}},
  doi          = {{10.1021/jp1109042}},
  volume       = {{115}},
  year         = {{2011}},
}

@article{62930,
  author       = {{Schumacher, Stefan and Galbraith, Ian and Ruseckas, Arvydas and Turnbull, Graham A. and Samuel, Ifor D. W.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{24}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach}}},
  doi          = {{10.1103/physrevb.81.245407}},
  volume       = {{81}},
  year         = {{2010}},
}

@article{15846,
  author       = {{Schumacher, Stefan and Galbraith, Ian and Ruseckas, Arvydas and Turnbull, Graham A. and Samuel, Ifor D. W.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach}}},
  doi          = {{10.1103/physrevb.81.245407}},
  year         = {{2010}},
}

@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{23484,
  author       = {{Golde, D. and Meier, T. and Koch, S. W.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{7}},
  title        = {{{High harmonics generated in semiconductor nanostructures by the coupled dynamics of optical inter- and intraband excitations}}},
  doi          = {{10.1103/physrevb.77.075330}},
  volume       = {{77}},
  year         = {{2008}},
}

@article{15848,
  author       = {{Schulz, S. and Schumacher, Stefan and Czycholl, G.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Tight-binding model for semiconductor quantum dots with a wurtzite crystal structure: From one-particle properties to Coulomb correlations and optical spectra}}},
  doi          = {{10.1103/physrevb.73.245327}},
  year         = {{2006}},
}

@article{15849,
  author       = {{Schumacher, Stefan and Czycholl, G. and Jahnke, F. and Kudyk, I. and Rückmann, H. I. and Gutowski, J. and Gust, A. and Alexe, G. and Hommel, D.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Polariton propagation in shallow-confinement heterostructures: Microscopic theory and experiment showing the breakdown of the dead-layer concept}}},
  doi          = {{10.1103/physrevb.70.235340}},
  year         = {{2005}},
}

@article{15850,
  author       = {{Schumacher, Stefan and Czycholl, G. and Jahnke, F. and Kudyk, I. and Wischmeier, L. and Rückmann, I. and Voss, T. and Gutowski, J. and Gust, A. and Hommel, D.}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  title        = {{{Coherent propagation of polaritons in semiconductor heterostructures: Nonlinear pulse transmission in theory and experiment}}},
  doi          = {{10.1103/physrevb.72.081308}},
  year         = {{2005}},
}