@article{37334,
  abstract     = {{<jats:p>Uniaxial anisotropy in nonlinear birefringent crystals limits the efficiency of nonlinear optical interactions and breaks the spatial symmetry of light generated in the parametric down-conversion (PDC) process. Therefore, this effect is usually undesirable and must be compensated for. However, high gain may be used to overcome the destructive role of anisotropy in order to generate bright two-mode correlated twin-beams. In this work, we provide a rigorous theoretical description of the spatial properties of bright squeezed light in the presence of strong anisotropy. We investigate a single crystal and a system of two crystals with an air gap (corresponding to a nonlinear SU(1,1) interferometer) and demonstrate the generation of bright correlated twin-beams in such configurations at high gain due to anisotropy. We explore the mode structure of the generated light and show how anisotropy, together with crystal spacing, can be used for radiation shaping.</jats:p>}},
  author       = {{Riabinin, M. and Sharapova, Polina and Meier, Torsten}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{14}},
  pages        = {{21876--21890}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Bright correlated twin-beam generation and radiation shaping in high-gain parametric down-conversion with anisotropy}}},
  doi          = {{10.1364/oe.424977}},
  volume       = {{29}},
  year         = {{2021}},
}

@article{26287,
  author       = {{Geraldi, Andrea and De, Syamsundar and Laneve, Alessandro and Barkhofen, Sonja and Sperling, Jan and Mataloni, Paolo and Silberhorn, Christine}},
  issn         = {{2643-1564}},
  journal      = {{Physical Review Research}},
  title        = {{{Transient subdiffusion via disordered quantum walks}}},
  doi          = {{10.1103/physrevresearch.3.023052}},
  year         = {{2021}},
}

@article{21021,
  author       = {{Tiedau, J. and Engelkemeier, M. and Brecht, Benjamin and Sperling, Jan and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Statistical Benchmarking of Scalable Photonic Quantum Systems}}},
  doi          = {{10.1103/physrevlett.126.023601}},
  volume       = {{126}},
  year         = {{2021}},
}

@article{26286,
  author       = {{Prasannan, Nidhin and De, Syamsundar and Barkhofen, Sonja and Brecht, Benjamin and Silberhorn, Christine and Sperling, Jan}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  title        = {{{Experimental entanglement characterization of two-rebit states}}},
  doi          = {{10.1103/physreva.103.l040402}},
  volume       = {{103}},
  year         = {{2021}},
}

@article{26285,
  author       = {{Köhnke, S. and Agudelo, E. and Schünemann, M. and Schlettwein, O. and Vogel, W. and Sperling, Jan and Hage, B.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Quantum Correlations beyond Entanglement and Discord}}},
  doi          = {{10.1103/physrevlett.126.170404}},
  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{24975,
  author       = {{Franz, Martin and Chandola, Sandhya and Koy, Maximilian and Zielinski, Robert and Aldahhak, Hazem and Das, Mowpriya and Freitag, Matthias and Gerstmann, Uwe and Liebig, Denise and Hoffmann, Adrian Karl and Rosin, Maximilian and Schmidt, Wolf Gero and Hogan, Conor and Glorius, Frank and Esser, Norbert and Dähne, Mario}},
  issn         = {{1755-4330}},
  journal      = {{Nature Chemistry}},
  pages        = {{828--835}},
  title        = {{{Controlled growth of ordered monolayers of N-heterocyclic carbenes on silicon}}},
  doi          = {{10.1038/s41557-021-00721-2}},
  year         = {{2021}},
}

@article{23418,
  abstract     = {{Density-functional theory within a Berry-phase formulation of the dynamical polarization is used to determine the second-order susceptibility χ(2) of lithium niobate (LiNbO3). Defect trapped polarons and bipolarons are found to strongly enhance the nonlinear susceptibility of the material, in particular if localized at NbV–VLi defect pairs. This is essentially a consequence of the polaronic excitation resulting in relaxation-induced gap states. The occupation of these levels leads to strongly enhanced χ(2) coefficients and allows for the spatial and transient modification of the second-harmonic generation of macroscopic samples.}},
  author       = {{Kozub, Agnieszka L. and Schindlmayr, Arno and Gerstmann, Uwe and Schmidt, Wolf Gero}},
  issn         = {{2469-9969}},
  journal      = {{Physical Review B}},
  pages        = {{174110}},
  publisher    = {{American Physical Society}},
  title        = {{{Polaronic enhancement of second-harmonic generation in lithium niobate}}},
  doi          = {{10.1103/PhysRevB.104.174110}},
  volume       = {{104}},
  year         = {{2021}},
}

@inproceedings{23475,
  author       = {{Rose, Hendrik and Paul, Jagannath and Wahlstrand, Jared K. and Bristow, Alan D. and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XXV}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y.}},
  title        = {{{Theoretical analysis and simulations of two-dimensional Fourier transform spectroscopy performed on exciton-polaritons of a quantum-well microcavity system}}},
  doi          = {{10.1117/12.2576696}},
  volume       = {{11684}},
  year         = {{2021}},
}

@article{37333,
  author       = {{Krauss-Kodytek, L. and Hannes, W.-R. and Meier, Torsten and Ruppert, C. and Betz, M.}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{8}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Nondegenerate two-photon absorption in ZnSe: Experiment and theory}}},
  doi          = {{10.1103/physrevb.104.085201}},
  volume       = {{104}},
  year         = {{2021}},
}

@article{21547,
  author       = {{Riabinin, Matvei and Sharapova, Polina and Bartley, Tim and Meier, Torsten}},
  issn         = {{2399-6528}},
  journal      = {{Journal of Physics Communications}},
  number       = {{4}},
  title        = {{{Generating two-mode squeezing with multimode measurement-induced nonlinearity}}},
  doi          = {{10.1088/2399-6528/abeec2}},
  volume       = {{5}},
  year         = {{2021}},
}

@article{23472,
  author       = {{Krauss-Kodytek, L. and Hannes, Wolf-Rüdiger and Meier, Torsten and Ruppert, C. and Betz, M.}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{8}},
  title        = {{{Nondegenerate two-photon absorption in ZnSe: Experiment and theory}}},
  doi          = {{10.1103/physrevb.104.085201}},
  volume       = {{104}},
  year         = {{2021}},
}

@inproceedings{26390,
  author       = {{Moritzer, Elmar and Flachmann, Felix}},
  booktitle    = {{PPS-36 Proceedings}},
  location     = {{Montreal}},
  title        = {{{Process-reliable Injection Molding of Highly Filled Wood-Plastic-Composites (WPC)}}},
  year         = {{2021}},
}

@article{22265,
  author       = {{Grabo, Matti and Acar, Emre and Kenig, Eugeny}},
  issn         = {{0960-1481}},
  journal      = {{Renewable Energy}},
  pages        = {{1087--1097}},
  title        = {{{Modeling and improvement of a packed bed latent heat storage filled with non-spherical encapsulated PCM-Elements}}},
  doi          = {{10.1016/j.renene.2021.04.022}},
  volume       = {{173}},
  year         = {{2021}},
}

@inproceedings{21477,
  author       = {{Rostek, Tim and Makeieva, Hanna and Homberg, Werner}},
  booktitle    = {{Proceedings of the 13th International Conference on the Technology of Plasticity}},
  editor       = {{Daehn, G. and Cao, J. and Kinsey, B. and Tekkaya, A. E.  and Vivek, A. and Yoshida, Y}},
  isbn         = {{978-3-030-75380-1}},
  location     = {{Columbus}},
  pages        = {{2115--2125}},
  publisher    = {{Springer, Cham}},
  title        = {{{Cutting Blades for Food Processing Applications Manufactured Using Innovative Spin Forming}}},
  doi          = {{10.1007/978-3-030-75381-8_178}},
  year         = {{2021}},
}

@article{22798,
  abstract     = {{The predictive quality of numerical simulations for mechanical joining processes depends on the implemented material model, especially regarding the plasticity of the joining parts. Therefore, experimental material characterization processes are conducted to determine the material properties of sheet metal and generate flow curves. In this regard, there are a number of procedures which are accompanied by varying experimental efforts. This paper presents various methods of determining flow curves for HCT590X as well as EN AW-6014, including varying specimen geometries and diverse hardening laws for extrapolation procedures. The flow curves thus generated are compared considering the variety of plastic strains occurring in mechanical joining processes. The material data generated are implemented in simulation models for the joining technologies, clinching and self-piercing riveting. The influence of the varied methods on the predictive accuracy of the simulation model is analysed. The evaluation of the differing flow curves is achieved by comparing the geometric formation of the joints and the required joining forces of the processes with experimentally investigated joints.}},
  author       = {{Böhnke, Max and Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}},
  issn         = {{2195-8572}},
  journal      = {{Materials Testing}},
  number       = {{6}},
  pages        = {{493--500}},
  publisher    = {{De Gruyter}},
  title        = {{{Influence of various procedures for the determination of flow curves on the predictive accuracy of numerical simulations for mechanical joining processes}}},
  doi          = {{10.1515/mt-2020-0082}},
  volume       = {{63}},
  year         = {{2021}},
}

@article{34226,
  abstract     = {{The increasing use of multi-material constructions lead to a continuous increase in the use of mechanical joining techniques due to the wide range of joining possibilities as well as the high load-bearing capacities of the joints. Nevertheless, the currently rigid tool systems are not able to react to changing boundary conditions, like changing the material-geometry-combination. Therefore research work is crucial with regard to versatile joining systems. In this paper, a new approach for a versatile self-piercing riveting process considering the joining system as well as the auxiliary joining part is presented.}},
  author       = {{Kappe, Fabian and Bobbert, Mathias and Meschut, Gerson}},
  issn         = {{1662-9795}},
  journal      = {{Key Engineering Materials}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  pages        = {{3--10}},
  publisher    = {{Trans Tech Publications, Ltd.}},
  title        = {{{New Approach for Versatile Self Piercing Riveting: Joining System and Auxiliary Part}}},
  doi          = {{10.4028/www.scientific.net/kem.883.3}},
  volume       = {{883}},
  year         = {{2021}},
}

@article{30200,
  author       = {{Wituschek, Simon and Kappe, Fabian and Lechner, Michael}},
  journal      = {{Production Engineering}},
  title        = {{{Investigation of the influence of varying tumbling strategies on a tumbling self-piercing riveting process}}},
  doi          = {{10.1007/s11740-021-01099-3}},
  year         = {{2021}},
}