@article{40523,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Tailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.</jats:p>}},
  author       = {{Jonas, B. and Heinze, Dirk Florian and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, Klaus and Reuter, Dirk and Schumacher, Stefan and Zrenner, Artur}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Nonlinear down-conversion in a single quantum dot}}},
  doi          = {{10.1038/s41467-022-28993-3}},
  volume       = {{13}},
  year         = {{2022}},
}

@article{40431,
  author       = {{Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{4}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}}},
  doi          = {{10.1103/physrevb.105.045302}},
  volume       = {{105}},
  year         = {{2022}},
}

@article{40423,
  abstract     = {{<jats:p>Lewis-acid doping of organic semiconductors (OSCs) opens up new ways of p-type doping and has recently become of significant interest.</jats:p>}},
  author       = {{Bauch, Fabian and Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{2046-2069}},
  journal      = {{RSC Advances}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{22}},
  pages        = {{13999--14006}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Protonation-induced charge transfer and polaron formation in organic semiconductors doped by Lewis acids}}},
  doi          = {{10.1039/d2ra02032g}},
  volume       = {{12}},
  year         = {{2022}},
}

@article{40425,
  author       = {{Bathe, Thomas and Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{1089-5639}},
  journal      = {{The Journal of Physical Chemistry A}},
  keywords     = {{Physical and Theoretical Chemistry}},
  number       = {{13}},
  pages        = {{2075--2081}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Microscopic Study of Molecular Double Doping}}},
  doi          = {{10.1021/acs.jpca.1c09179}},
  volume       = {{126}},
  year         = {{2022}},
}

@article{34094,
  author       = {{Gao, Ying and Li, Yao and Ma, Xuekai and Gao, Meini and Dai, Haitao and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  keywords     = {{Physics and Astronomy (miscellaneous)}},
  number       = {{20}},
  publisher    = {{AIP Publishing}},
  title        = {{{Tilting nondispersive bands in an empty microcavity}}},
  doi          = {{10.1063/5.0093908}},
  volume       = {{121}},
  year         = {{2022}},
}

@article{31937,
  author       = {{Li, Yao and Ma, Xuekai and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  number       = {{6}},
  pages        = {{2079--2086}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Switching Off a Microcavity Polariton Condensate near the Exceptional Point}}},
  doi          = {{10.1021/acsphotonics.2c00288}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{33080,
  author       = {{Long, Teng and Ma, Xuekai and Ren, Jiahuan and Li, Feng and Liao, Qing and Schumacher, Stefan and Malpuech, Guillaume and Solnyshkov, Dmitry and Fu, Hongbing}},
  issn         = {{2198-3844}},
  journal      = {{Advanced Science}},
  keywords     = {{General Physics and Astronomy, General Engineering, Biochemistry, Genetics and Molecular Biology (miscellaneous), General Materials Science, General Chemical Engineering, Medicine (miscellaneous)}},
  number       = {{29}},
  publisher    = {{Wiley}},
  title        = {{{Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity}}},
  doi          = {{10.1002/advs.202203588}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{32310,
  author       = {{Li, Yao and Ma, Xuekai and Zhai, Xiaokun and Gao, Meini and Dai, Haitao and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature}}},
  doi          = {{10.1038/s41467-022-31529-4}},
  volume       = {{13}},
  year         = {{2022}},
}

@article{32148,
  author       = {{Gao, Xinghui and Hu, Wei and Schumacher, Stefan and Ma, Xuekai}},
  issn         = {{0146-9592}},
  journal      = {{Optics Letters}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{13}},
  pages        = {{3235--3238}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Unidirectional vortex waveguides and multistable vortex pairs in polariton condensates}}},
  doi          = {{10.1364/ol.457724}},
  volume       = {{47}},
  year         = {{2022}},
}

@article{26283,
  author       = {{Lüders, Carolin and Pukrop, Matthias and Rozas, Elena and Schneider, Christian and Höfling, Sven and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}},
  issn         = {{2691-3399}},
  journal      = {{PRX Quantum}},
  title        = {{{Quantifying Quantum Coherence in Polariton Condensates}}},
  doi          = {{10.1103/prxquantum.2.030320}},
  year         = {{2021}},
}

@article{23816,
  abstract     = {{Employing the ultrafast control of electronic states of a semiconductor quantum dot in a cavity, we introduce an approach to achieve on-demand emission of single photons with almost perfect indistinguishability and photon pairs with near ideal entanglement. Our scheme is based on optical excitation off resonant to a cavity mode followed by ultrafast control of the electronic states using the time-dependent quantum-confined Stark effect, which then allows for cavity-resonant emission. Our theoretical analysis considers cavity-loss mechanisms, the Stark effect, and phonon-induced dephasing, allowing realistic predictions for finite temperatures.}},
  author       = {{Bauch, David and Heinze, Dirk Florian and Förstner, Jens and Jöns, Klaus and Schumacher, Stefan}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  keywords     = {{tet_topic_qd}},
  pages        = {{085308}},
  title        = {{{Ultrafast electric control of cavity mediated single-photon and photon-pair generation with semiconductor quantum dots}}},
  doi          = {{10.1103/physrevb.104.085308}},
  volume       = {{104}},
  year         = {{2021}},
}

@article{39653,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>A detailed investigation of the energy levels of perylene-3,4,9,10-tetracarboxylic tetraethylester as a representative compound for the whole family of perylene esters was performed. It was revealed via electrochemical measurements that one oxidation and two reductions take place. The bandgaps determined via the electrochemical approach are in good agreement with the optical bandgap obtained from the absorption spectra via a Tauc plot. In addition, absorption spectra in dependence of the electrochemical potential were the basis for extensive quantum-chemical calculations of the neutral, monoanionic, and dianionic molecules. For this purpose, calculations based on density functional theory were compared with post-Hartree–Fock methods and the CAM-B3LYP functional proved to be the most reliable choice for the calculation of absorption spectra. Furthermore, spectral features found experimentally could be reproduced with vibronic calculations and allowed to understand their origins. In particular, the two lowest energy absorption bands of the anion are not caused by absorption of two distinct electronic states, which might have been expected from vertical excitation calculations, but both states exhibit a strong vibronic progression resulting in contributions to both bands.</jats:p>}},
  author       = {{Wiebeler, Christian and Vollbrecht, Joachim and Neuba, Adam and Kitzerow, Heinz-Siegfried and Schumacher, Stefan}},
  issn         = {{2045-2322}},
  journal      = {{Scientific Reports}},
  keywords     = {{Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Unraveling the electrochemical and spectroscopic properties of neutral and negatively charged perylene tetraethylesters}}},
  doi          = {{10.1038/s41598-021-95551-0}},
  volume       = {{11}},
  year         = {{2021}},
}

@article{40434,
  author       = {{Klement, Philip and Dehnhardt, Natalie and Dong, Chuan-Ding and Dobener, Florian and Bayliff, Samuel and Winkler, Julius and Hofmann, Detlev M. and Klar, Peter J. and Schumacher, Stefan and Chatterjee, Sangam and Heine, Johanna}},
  issn         = {{0935-9648}},
  journal      = {{Advanced Materials}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  number       = {{23}},
  publisher    = {{Wiley}},
  title        = {{{Atomically Thin Sheets of Lead‐Free 1D Hybrid Perovskites Feature Tunable White‐Light Emission from Self‐Trapped Excitons}}},
  doi          = {{10.1002/adma.202100518}},
  volume       = {{33}},
  year         = {{2021}},
}

@article{21362,
  author       = {{Xue, Yan and Chestnov, Igor and Sedov, Evgeny and Kiktenko, Evgeniy and Fedorov, Aleksey K. and Schumacher, Stefan and Ma, Xuekai and Kavokin, Alexey}},
  issn         = {{2643-1564}},
  journal      = {{Physical Review Research}},
  number       = {{1}},
  title        = {{{Split-ring polariton condensates as macroscopic two-level quantum systems}}},
  doi          = {{10.1103/physrevresearch.3.013099}},
  volume       = {{3}},
  year         = {{2021}},
}

@article{21359,
  author       = {{Barkhausen, Franziska and Pukrop, Matthias and Schumacher, Stefan and Ma, Xuekai}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{7}},
  title        = {{{Structuring coflowing and counterflowing currents of polariton condensates in concentric ring-shaped and elliptical potentials}}},
  doi          = {{10.1103/physrevb.103.075305}},
  volume       = {{103}},
  year         = {{2021}},
}

@article{21360,
  author       = {{Luk, Samuel M. H. and Vergnet, Hadrien and Lafont, Ombline and Lewandowski, Przemyslaw and Kwong, Nai H. and Galopin, Elisabeth and Lemaitre, Aristide and Roussignol, Philippe and Tignon, Jérôme and Schumacher, Stefan and Binder, Rolf and Baudin, Emmanuel}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  pages        = {{449--454}},
  title        = {{{All-Optical Beam Steering Using the Polariton Lighthouse Effect}}},
  doi          = {{10.1021/acsphotonics.0c01962}},
  year         = {{2021}},
}

@article{40433,
  author       = {{Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{1932-7447}},
  journal      = {{The Journal of Physical Chemistry C}},
  keywords     = {{Surfaces, Coatings and Films, Physical and Theoretical Chemistry, General Energy, Electronic, Optical and Magnetic Materials}},
  number       = {{40}},
  pages        = {{21824--21830}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Microscopic Insights into Charge Formation and Energetics in n-Doped Organic Semiconductors}}},
  doi          = {{10.1021/acs.jpcc.1c05666}},
  volume       = {{125}},
  year         = {{2021}},
}

@article{40435,
  abstract     = {{<p>Coulomb binding energy is reduced when a few-molecule integer charge transfer complex (ICTC) is formed.</p>}},
  author       = {{Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{2050-7526}},
  journal      = {{Journal of Materials Chemistry C}},
  keywords     = {{Materials Chemistry, General Chemistry}},
  number       = {{34}},
  pages        = {{11929--11935}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding}}},
  doi          = {{10.1039/d0tc02185g}},
  volume       = {{8}},
  year         = {{2020}},
}

@article{20582,
  author       = {{Berger, Bernd and Schmidt, Daniel and Ma, Xuekai and Schumacher, Stefan and Schneider, Christian and Höfling, Sven and Assmann, Marc}},
  journal      = {{Physical Review B}},
  number       = {{24}},
  pages        = {{245309}},
  publisher    = {{American Physical Society}},
  title        = {{{Formation dynamics of exciton-polariton vortices created by nonresonant annular pumping}}},
  doi          = {{10.1103/PhysRevB.101.245309}},
  volume       = {{101}},
  year         = {{2020}},
}

@article{40443,
  author       = {{Pukrop, Matthias and Schumacher, Stefan}},
  issn         = {{2470-0045}},
  journal      = {{Physical Review E}},
  number       = {{1}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Externally controlled Lotka-Volterra dynamics in a linearly polarized polariton fluid}}},
  doi          = {{10.1103/physreve.101.012207}},
  volume       = {{101}},
  year         = {{2020}},
}