@article{63741, author = {{Thomas, S. E. and Hird, T. M. and Munns, J. H. D. and Brecht, Benjamin and Saunders, D. J. and Nunn, J. and Walmsley, I. A. and Ledingham, P. M.}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Raman quantum memory with built-in suppression of four-wave-mixing noise}}}, doi = {{10.1103/physreva.100.033801}}, volume = {{100}}, year = {{2019}}, } @article{63742, author = {{Gao, S. and Lazo-Arjona, O. and Brecht, Benjamin and Kaczmarek, K. T. and Thomas, S. E. and Nunn, J. and Ledingham, P. M. and Saunders, D. J. and Walmsley, I. A.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{21}}, publisher = {{American Physical Society (APS)}}, title = {{{Optimal Coherent Filtering for Single Noisy Photons}}}, doi = {{10.1103/physrevlett.123.213604}}, volume = {{123}}, year = {{2019}}, } @inproceedings{45469, author = {{Schröder, Jan and Vogelsang, Christoph and Riese, Josef}}, booktitle = {{E-Book Proceedings of the ESERA 2019 Conference: The beauty and pleasure of understanding: engaging with contemporary challenges through science education}}, editor = {{Levrini, Olivia and Tasquier, Giulia}}, pages = {{1477--1485}}, title = {{{Assessing Student Teachers‘ Skills to plan Physics Lessons}}}, volume = {{13}}, year = {{2019}}, } @article{45194, abstract = {{Angehende Physiklehrkräfte sollen im Rahmen ihres Studiums fachliches und fachdidaktisches Wissen erwerben, welches die Gestaltung lernförderlichen Unterrichts ermöglicht. Es ist allerdings empirisch nur wenig geklärt, wie sich dieses Wissen im Laufe des Studiums entwickelt und ob es zur Ausbildung von Handlungsfähigkeiten beiträgt. Um derartige Wirkungsaussagen treffen zu können, müssen Instrumente entwickelt werden, die eine valide Testwertinterpretation zulassen. In diesem Beitrag werden auf Basis von im Projekt Profile-P+ entwickelten Instrumenten Validitätsanalysen zur längsschnittlichen Entwicklung des Professionswissens von Physiklehramtsstudierenden im Verlauf des Bachelorstudiums und ihrer Fähigkeiten zur Planung und Reflexion von Physikunterricht sowie zum Erklären von physikalischen Sachverhalten vor und nach dem Praxissemester dargestellt. Neben Wissenstests kamen standardisierte Performanztests zum Einsatz. Die vorliegenden Ergebnisse sprechen dafür, dass die erhobenen Messwerte im Sinne von Wirkungsaussagen interpretiert werden können. (DIPF/Orig.)}}, author = {{Vogelsang, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Kulgemeyer, Christoph and Reinhold, Peter and Riese, Josef and Schecker, Horst and Schröder, Jan}}, journal = {{Zeitschrift für Pädagogik}}, number = {{4}}, pages = {{473--491}}, publisher = {{Beltz}}, title = {{{Entwicklung von Professionswissen und Unterrichtsperformanz im Lehramtsstudium Physik. Analysen zu valider Testwertinterpretation}}}, doi = {{10.25656/01:23990}}, volume = {{65}}, year = {{2019}}, } @inbook{45471, author = {{Vogelsang, Christoph and Borowski, Andreas and Kulgemeyer, Christoph and Riese, Josef and Reinhold, Peter and Schecker, Horst and Buschütter, David and Enkrott, Patrick and Kempin, Maren and Schröder, Jan}}, booktitle = {{Student Learning Outcomes Assessment in Higher Education – Perspectives, Concepts and Approaches for Research, Transfer and Implementation (KoKoHs Working Papers, 12)}}, editor = {{Zlatkin-Troitschanskaia, Olga and Toepper, Miriam and Pant, Hans Anand and Lautenbach, Corinna and Kuhn, Christiane}}, pages = {{40--43}}, title = {{{Performance-Oriented Testing and Training in Teacher Education}}}, year = {{2019}}, } @inproceedings{45478, author = {{Vogelsang, Christoph and Riese, Josef and Borowski, Andreas and Kulgemeyer, Christoph}}, booktitle = {{Naturwissenschaftliche Bildung als Grundlage für berufliche und gesellschaftliche Teilhabe. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Kiel 2018}}, editor = {{Maurer, Christian}}, pages = {{345--348}}, title = {{{Profile-P+: Kompetenz und Performanz im Lehramtsstudium Physik}}}, volume = {{39}}, year = {{2019}}, } @inproceedings{45477, author = {{Schröder, Jan and Vogelsang, Christoph and Riese, Josef}}, booktitle = {{Naturwissenschaftliche Bildung als Grundlage für berufliche und gesellschaftliche Teilhabe. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Kiel 2018}}, editor = {{Maurer, Christian}}, pages = {{353--356}}, title = {{{Erfassung der Fähigkeit zur Unterrichtsplanung im Physikunterricht}}}, volume = {{39}}, year = {{2019}}, } @article{20578, author = {{Driben, R and Ma, Xuekai and Schumacher, Stefan and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{6}}, pages = {{1327--1330}}, title = {{{Bloch oscillations of multidimensional dark soliton wave packets and light bullets}}}, doi = {{10.1364/ol.44.001327}}, volume = {{44}}, year = {{2019}}, } @article{15851, author = {{Ma, Xuekai and Kartashov, Yaroslav Y and Gao, Tingge and Schumacher, Stefan}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, title = {{{Controllable high-speed polariton waves in a PT-symmetric lattice}}}, doi = {{10.1088/1367-2630/ab5a9b}}, volume = {{21}}, year = {{2019}}, } @unpublished{13340, abstract = {{Spontaneous formation of transverse patterns is ubiquitous in nonlinear dynamical systems of all kinds. An aspect of particular interest is the active control of such patterns. In nonlinear optical systems this can be used for all-optical switching with transistor-like performance, for example realized with polaritons in a planar quantum-well semiconductor microcavity. Here we focus on a specific configuration which takes advantage of the intricate polarization dependencies in the interacting optically driven polariton system. Besides detailed numerical simulations of the coupled light-field exciton dynamics, in the present paper we focus on the derivation of a simplified population competition model giving detailed insight into the underlying mechanisms from a nonlinear dynamical systems perspective. We show that such a model takes the form of a generalized Lotka-Volterra system for two competing populations explicitly including a source term that enables external control. We present a comprehensive analysis both of the existence and stability of stationary states in the parameter space spanned by spatial anisotropy and external control strength. We also construct phase boundaries in non-trivial regions and characterize emerging bifurcations. The population competition model reproduces all key features of the switching observed in full numerical simulations of the rather complex semiconductor system and at the same time is simple enough for a fully analytical understanding of the system dynamics.}}, author = {{Pukrop, Matthias and Schumacher, Stefan}}, booktitle = {{arXiv:1903.12534}}, title = {{{Externally Controlled Lotka-Volterra Dynamics in a Linearly Polarized Polariton Fluid}}}, year = {{2019}}, } @unpublished{13347, abstract = {{<div> <div> <div> <p>Molecular doping in conjugated polymers is a crucial process for their application in organic photovoltaics and optoelectronics. In the present work we theoretically investigate p-type molecu- lar doping in a series of (poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b”]dithiophene)-alt- 4,7-(2,1,3-benzothiadiazole)] (PCPDT-BT) conjugated oligomers with different lengths and three widely-used dopants with different electron affinities, namely F4TCNQ, F6TCNNQ, and CN6-CP. We study in detail the molecular geometry of possible oligomer-dopant complexes and its influence on the doping mechanisms and electronic system properties. We find that the mechanisms of dop- ing and charge transfer observed sensitively depend on the specific geometry of the oligomer-dopant complexes. For a given complex different geometries may exist, some of which show transfer of an entire electron from the oligomer chain onto the dopant molecule resulting in an integer-charge transfer complex, leaving the system in a ground state with broken spin symmetry. In other ge- ometries merely hybridization of oligomer and dopant frontier orbitals occurs with partial charge transfer but spin-symmetric ground state. Considering the resulting electronic density of states both cases may well contribute to an increased electrical conductivity of corresponding film samples while the underlying physical mechanisms are entirely different. </p> </div> </div> </div>}}, author = {{Dong, Chuan-Ding and Schumacher, Stefan}}, title = {{{Molecular Doping of PCPDT-BT Copolymers: Comparison of Molecular Complexes with and Without Integer Charge Transfer}}}, year = {{2019}}, } @article{13343, author = {{Vollbrecht, Joachim and Wiebeler, Christian and Bock, Harald and Schumacher, Stefan and Kitzerow, Heinz-Siegfried}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, number = {{7}}, pages = {{4483--4492}}, title = {{{Curved Polar Dibenzocoronene Esters and Imides versus Their Planar Centrosymmetric Homologs: Photophysical and Optoelectronic Analysis}}}, doi = {{10.1021/acs.jpcc.8b10730}}, volume = {{123}}, year = {{2019}}, } @article{40384, author = {{Ferreri, Alessandro and Ansari, V. and Silberhorn, Christine and Sharapova, Polina R.}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{5}}, publisher = {{American Physical Society (APS)}}, title = {{{Temporally multimode four-photon Hong-Ou-Mandel interference}}}, doi = {{10.1103/physreva.100.053829}}, volume = {{100}}, year = {{2019}}, } @article{13282, author = {{Lin, Zemeng and Huang, Lingling and Xu, Zhen Tao and Li, Xiaowei and Zentgraf, Thomas and Wang, Yongtian}}, issn = {{2195-1071}}, journal = {{Advanced Optical Materials}}, number = {{21}}, pages = {{1900782}}, title = {{{Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces}}}, doi = {{10.1002/adom.201900782}}, volume = {{7}}, year = {{2019}}, } @article{24953, author = {{Bauer, Anna and Sacher, Marc}}, journal = {{Phydid B, Didaktik der Physik, Beiträge zur DPG-Frühjahrstagung}}, title = {{{Kompetenzorientierte, universitäre Laborpraktika - Das Paderborner Physik Praktikum (3P)}}}, year = {{2018}}, } @inbook{24960, author = {{Bauer, Anna and Reinhold, Peter and Sacher, Marc}}, booktitle = {{Qualitätsvoller Chemie- und Physikunterricht – normative und empirische Dimensionen}}, editor = {{Maurer, Christian}}, pages = {{919--922}}, publisher = {{Gesellschaft für Didaktik der Chemie und Physik}}, title = {{{Operationalisierung der experimentellen Kompetenz (Physik)Studierender}}}, year = {{2018}}, } @article{3912, abstract = {{DNA origami nanostructures are versatile substrates for the controlled arrangement of molecular capture sites with nanometer precision and thus have many promising applications in singlemolecule bioanalysis. Here, we investigate the adsorption of DNA origami nanostructures in nanohole arrays which represent an important class of biosensors and may benefit from the incorporation of DNA origami-based molecular probes. Nanoholes with well-defined diameter that enable the adsorption of single DNA origami triangles are fabricated in Au films on Siwafers by nanosphere lithography. The efficiency of directed DNA origami adsorption on the exposed SiO2 areas at the bottoms of the nanoholes is evaluated in dependence of various parameters, i.e., Mg2+ and DNA origami concentrations, buffer strength, adsorption time, and nanohole diameter. We observe that the buffer strength has a surprisingly strong effect on DNA origami adsorption in the nanoholes and that multiple DNA origami triangles with 120 nm edge length can adsorb in nanoholes as small as 120 nm in diameter. We attribute the latter observation to the low lateral mobility of once adsorbed DNA origami on the SiO2 surface, in combination with parasitic adsorption to the Au film. While parasitic adsorption can be suppressed by modifying the Au film with a hydrophobic self-assembled monolayer, the limited surface mobility of the adsorbed DNA origami still leads to poor localization accuracy in the nanoholes and results in many DNA origami crossing the boundary to the Au film even under optimized conditions. We discuss possible ways to minimize this effect by varying the composition of the adsorption buffer, employing different fabrication conditions, or using other substrate materials for nanohole array fabrication.}}, author = {{Brassat, Katharina and Ramakrishnan, Saminathan and Bürger, Julius and Hanke, Marcel and Doostdar, Mahnaz and Lindner, Jörg and Grundmeier, Guido and Keller, Adrian}}, issn = {{0743-7463}}, journal = {{Langmuir}}, publisher = {{American Chemical Society (ACS)}}, title = {{{On the Adsorption of DNA Origami Nanostructures in Nanohole Arrays}}}, doi = {{10.1021/acs.langmuir.8b00793}}, year = {{2018}}, } @article{21027, author = {{Ansari, Vahid and Donohue, John M. and Allgaier, Markus and Sansoni, Linda and Brecht, Benjamin and Roslund, Jonathan and Treps, Nicolas and Harder, Georg and Silberhorn, Christine}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, title = {{{Tomography and Purification of the Temporal-Mode Structure of Quantum Light}}}, doi = {{10.1103/physrevlett.120.213601}}, volume = {{120}}, year = {{2018}}, } @article{21028, author = {{Ansari, Vahid and Donohue, John M. and Brecht, Benjamin and Silberhorn, Christine}}, issn = {{2334-2536}}, journal = {{Optica}}, number = {{5}}, title = {{{Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings}}}, doi = {{10.1364/optica.5.000534}}, volume = {{5}}, year = {{2018}}, } @article{1765, author = {{Huang, Lingling and Zhang, Shuang and Zentgraf, Thomas}}, issn = {{2192-8614}}, journal = {{Nanophotonics}}, number = {{6}}, pages = {{1169--1190}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Metasurface holography: from fundamentals to applications}}}, doi = {{10.1515/nanoph-2017-0118}}, volume = {{7}}, year = {{2018}}, }