TY - CHAP AB - Die Studieneingangsphase Physik stellt für die Studienanfänger Innen einen komplexen Lernprozess mit vielfältigen Anforderungen auf fachlicher, Metakognitions- und Sozialisations-Ebene dar, der ihre akademische Identitätsbildung beeinflusst und prägt. Ziel des Projektes Paderborner Studieneingangsphase Physik (PSΦ) ist die evidenzbasierte Gestaltung eines strukturierten Studieneinstiegs und einer in sich kohärent abgestimmten Studieneingangsphase „aus einem Guss“. Die Implementation eines neuen Übungsformats (Präsenzübungen) in den Fachvorlesungen sowie die Unterstützung der Studierenden im Bereich des selbstregulierten Lernens zeigen positive Effekte in einer erhöhten Teilnahmequote sowie Zufriedenheit der Studierenden mit der Veranstaltung, in einem aktiveren Arbeitsverhalten sowie einer höheren Bestehensquote der Klausur. Ein messbar größerer Fachwissenserwerb konnte nicht nachgewiesen werden. Auf Basis der Evidenzen konnten Stellschrauben für die Weiterentwicklung sowie für die Unterstützung der Lehrenden abgeleitet werden. In dem Beitrag werden die Gelingensbedingungen und Strukturen für eine wirksame Zusammenarbeit von Fachdidaktik und Fachwissenschaft am Beispiel der Überarbeitung der Studieneingangsphase im Rahmen einer community of practice sowie der Wirksamkeit der Implementierung diskutiert. AU - Bauer, Anna AU - Woitkowski, David AU - Reuter, Dirk AU - Reinhold, Peter ED - Fahr, Uwe ED - Kenner, Alessandra ED - Angenent, Holger ED - Eßer-Lüghausen, Alexandra ID - 29789 T2 - Hochschullehre erforschen. TI - Fachliche und überfachliche Herausforderungen in der Studieneingangsphase Physik ER - TY - JOUR AB - Metasurfaces provide applications for a variety of flat elements and devices due to the ability to modulate light with subwavelength structures. The working principle meanwhile gives rise to the crucial problem and challenge to protect the metasurface from dust or clean the unavoidable contaminants during daily usage. Here, taking advantage of the intelligent bioinspired surfaces which exhibit self-cleaning properties, a versatile dielectric metasurface benefiting from the obtained superhydrophilic or quasi-superhydrophobic states is shown. The design is realized by embedding the metasurface inside a large area of wettability supporting structures, which is highly efficient in fabrication, and achieves both optical and wettability functionality at the same time. The superhydrophilic state enables an enhanced optical response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated between these two wettability or functional states by appropriate treatments in a repeatable way, without degrading the optical performance. The proposed design strategy will bring new opportunities to smart metasurfaces with improved optical performance, versatility, and physical stability. AU - Lu, Jinlong AU - Sain, Basudeb AU - Georgi, Philip AU - Protte, Maximilian AU - Bartley, Tim AU - Zentgraf, Thomas ID - 26747 IS - 1 JF - Advanced Optical Materials SN - 2195-1071 TI - A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response VL - 10 ER - TY - JOUR AB - While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often, symmetry effects are utilized to obtain particular optical responses. By breaking certain spatial symmetries, chiral structures arise and provide robust chiroptical responses to these plasmonic resonances. Here, we observe strong chiroptical responses in the linear and nonlinear optical regime for chiral L-handed helicoid-III nanoparticles and quantify them by means of an asymmetric factor, the so-called g-factor. We calculate the linear optical g-factors for two distinct chiroptical resonances to −0.12 and –0.43 and the nonlinear optical g-factors to −1.45 and −1.63. The results demonstrate that the chirality of the helicoid-III nanoparticles is strongly enhanced in the nonlinear regime. AU - Spreyer, Florian AU - Mun, Jungho AU - Kim, Hyeohn AU - Kim, Ryeong Myeong AU - Nam, Ki Tae AU - Rho, Junsuk AU - Zentgraf, Thomas ID - 30195 IS - 3 JF - ACS Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Biotechnology KW - Electronic KW - Optical and Magnetic Materials SN - 2330-4022 TI - Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles VL - 9 ER - TY - JOUR AB - AbstractTailored 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. AU - Jonas, B. AU - Heinze, D. AU - Schöll, E. AU - Kallert, P. AU - Langer, T. AU - Krehs, S. AU - Widhalm, A. AU - Jöns, K. D. AU - Reuter, D. AU - Schumacher, S. AU - Zrenner, Artur ID - 30385 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry SN - 2041-1723 TI - Nonlinear down-conversion in a single quantum dot VL - 13 ER - TY - JOUR AU - Praschan, Tom AU - Heinze, Dirk AU - Breddermann, Dominik AU - Zrenner, Artur AU - Walther, Andrea AU - Schumacher, Stefan ID - 30384 IS - 4 JF - Physical Review B SN - 2469-9950 TI - Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton VL - 105 ER - TY - JOUR AU - Riedl, Thomas AU - Kunnathully, Vinay S. AU - Trapp, Alexander AU - Langer, Timo AU - Reuter, Dirk AU - Lindner, Jörg K. N. ID - 30743 JF - Advanced Materials Interfaces KW - Mechanical Engineering KW - Mechanics of Materials SN - 2196-7350 TI - Size‐Dependent Strain Relaxation in InAs Quantum Dots on Top of GaAs(111)A Nanopillars ER - TY - JOUR AU - Kobecki, Michal AU - Scherbakov, Alexey V. AU - Kukhtaruk, Serhii M. AU - Yaremkevich, Dmytro D. AU - Henksmeier, Tobias AU - Trapp, Alexander AU - Reuter, Dirk AU - Gusev, Vitalyi E. AU - Akimov, Andrey V. AU - Bayer, Manfred ID - 30880 IS - 15 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Giant Photoelasticity of Polaritons for Detection of Coherent Phonons in a Superlattice with Quantum Sensitivity VL - 128 ER - TY - JOUR AU - Reineke Matsudo, Bernhard AU - Sain, Basudeb AU - Carletti, Luca AU - Zhang, Xue AU - Gao, Wenlong AU - Angelis, Costantino AU - Huang, Lingling AU - Zentgraf, Thomas ID - 29902 IS - 12 JF - Advanced Science KW - General Physics and Astronomy KW - General Engineering KW - Biochemistry KW - Genetics and Molecular Biology (miscellaneous) KW - General Materials Science KW - General Chemical Engineering KW - Medicine (miscellaneous) SN - 2198-3844 TI - Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces VL - 9 ER - TY - JOUR AU - Gao, Wenlong AU - Sain, Basudeb AU - Zentgraf, Thomas ID - 30964 IS - 4 JF - Physical Review Applied KW - General Physics and Astronomy SN - 2331-7019 TI - Spin-Orbit Interaction of Light Enabled by Negative Coupling in High-Quality-Factor Optical Metasurfaces VL - 17 ER - TY - JOUR AU - Henksmeier, T. AU - Schulz, J.F. AU - Kluth, E. AU - Feneberg, M. AU - Goldhahn, R. AU - Sanchez, A.M. AU - Voigt, M. AU - Grundmeier, Guido AU - Reuter, Dirk ID - 32108 JF - Journal of Crystal Growth KW - Materials Chemistry KW - Inorganic Chemistry KW - Condensed Matter Physics SN - 0022-0248 TI - Remote epitaxy of InxGa1-xAs (0 0 1) on graphene covered GaAs(0 0 1) substrates VL - 593 ER - TY - JOUR AB - Subwavelength dielectric resonators assembled into metasurfaces have become a versatile tool for miniaturizing optical components approaching the nanoscale. An important class of metasurface functionalities is associated with asymmetry in both the generation and transmission of light with respect to reversals of the positions of emitters and receivers. The nonlinear light–matter interaction in metasurfaces offers a promising pathway towards miniaturization of the asymmetric control of light. Here we demonstrate asymmetric parametric generation of light in nonlinear metasurfaces. We assemble dissimilar nonlinear dielectric resonators into translucent metasurfaces that produce images in the visible spectral range on being illuminated by infrared radiation. By design, the metasurfaces produce different and completely independent images for the reversed direction of illumination, that is, when the positions of the infrared emitter and the visible light receiver are exchanged. Nonlinearity-enabled asymmetric control of light by subwavelength resonators paves the way towards novel nanophotonic components via dense integration of large quantities of nonlinear resonators into compact metasurface designs. AU - Kruk, Sergey S. AU - Wang, Lei AU - Sain, Basudeb AU - Dong, Zhaogang AU - Yang, Joel AU - Zentgraf, Thomas AU - Kivshar, Yuri ID - 32088 JF - Nature Photonics KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 1749-4885 TI - Asymmetric parametric generation of images with nonlinear dielectric metasurfaces VL - 16 ER - TY - JOUR AB - Eines der Lernziele des Physikstudiums stellt der Erwerb literaler Fähigkeiten für das Verfassen wissenschaftlicher Arbeiten dar. Die Student:innen werden allerdings im Rahmen ihres Studiums bisher kaum systematisch beim Erwerb dieser Fähigkeiten unterstützt. Eine Übungsgelegenheit für das Verfassen von Texten nach wissenschaftlichem Vorbild stellt das Laborpraktikum dar, in dem die Student:innen zu den absolvierten Experimenten Laborberichte verfassen. Im Paderborner Physik Praktikum 3P wurden in den letzten Jahren vier unterschiedliche Unterstützungsangebote für das Erlernen des wissenschaftlichen Schreibens entwickelt und mittels Zufriedenheitswerten evaluiert. In dem Beitrag werden die vier Angebote auf inhaltlicher Ebene hinsichtlich der Lernwirksamkeit mittels einer schriftproduktbasierten Evaluation analysiert. Durch die vergleichende Analyse können Potenziale und Grenzen der Angebote diskutiert und Implikationen für die Gestaltung von Unterstützungsangeboten zum Erlernen des wissenschaftlichen Schreibens in der Physik abgeleitet werden. AU - Bauer, Anna Brigitte AU - Lahme, Simon Zacharias AU - Sacher, Marc ID - 34316 IS - 1 JF - PhyDid A - Physik und Didaktik in Schule und Hochschule KW - Laborpraktikum KW - Schreiben TI - Potenziale und Grenzen von Unterstützungsmaßnahmen zum wissenschaftlichen Schreiben im Paderborner Physik Praktikum 3P VL - 21 ER - TY - CONF AU - laeim, Huddad AU - Schlickriede, Christian AU - Chaisakul, Papichaya AU - Chattham, Nattaporn AU - Panitchakan, Hathai AU - Siangchaew, Krisda AU - Zentgraf, Thomas AU - Pattanaporhratana, Apichart ED - Engheta, Nader ED - Noginov, Mikhail A. ED - Zheludev, Nikolay I. ID - 34465 T2 - Metamaterials, Metadevices, and Metasystems 2022 TI - Design and investigation of a metalens for efficiency enhancement of laser-waveguide coupling in a limited space system ER - TY - JOUR AU - Verma, A.K. AU - Bopp, F. AU - Finley, J.J. AU - Jonas, B. AU - Zrenner, A. AU - Reuter, Dirk ID - 31241 JF - Journal of Crystal Growth KW - Materials Chemistry KW - Inorganic Chemistry KW - Condensed Matter Physics SN - 0022-0248 TI - Low Areal Densities of InAs Quantum Dots on GaAs(100) Prepared by Molecular Beam Epitaxy ER - TY - JOUR AB - Optical geometric phase encoded by in-plane spatial orientation of microstructures has promoted the rapid development of numerous functional meta-devices. However, pushing the concept of the geometric phase toward the acoustic community still faces challenges. In this work, we utilize two acoustic nonlocal metagratings that could support a direct conversion between an acoustic plane wave and a designated vortex mode to obtain the acoustic geometric phase, in which an orbital angular momentum conversion process plays a vital role. In addition, we realize the acoustic geometric phases of different orders by merely varying the orientation angle of the acoustic nonlocal metagratings. Intriguingly, according to our developed theory, we reveal that the reflective acoustic geometric phase, which is twice the transmissive one, can be readily realized by transferring the transmitted configuration to a reflected one. Both the theoretical study and experimental measurements verify the announced transmissive and reflective acoustic geometric phases. Moreover, the reconfigurability and continuous phase modulation that covers the 2π range shown by the acoustic geometric phases provide us with the alternatives in advanced acoustic wavefront control. AU - Liu, Bingyi AU - Zhou, Zhiling AU - Wang, Yongtian AU - Zentgraf, Thomas AU - Li, Yong AU - Huang, Lingling ID - 31480 IS - 21 JF - Applied Physics Letters KW - Physics and Astronomy (miscellaneous) SN - 0003-6951 TI - Experimental verification of the acoustic geometric phase VL - 120 ER - TY - JOUR AU - Kobecki, Michal AU - Scherbakov, Alexey V. AU - Kukhtaruk, Serhii M. AU - Yaremkevich, Dmytro D. AU - Henksmeier, Tobias AU - Trapp, Alexander AU - Reuter, Dirk AU - Gusev, Vitalyi E. AU - Akimov, Andrey V. AU - Bayer, Manfred ID - 31541 IS - 15 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Giant Photoelasticity of Polaritons for Detection of Coherent Phonons in a Superlattice with Quantum Sensitivity VL - 128 ER - TY - JOUR AU - Bopp, Frederik AU - Rojas, Jonathan AU - Revenga, Natalia AU - Riedl, Hubert AU - Sbresny, Friedrich AU - Boos, Katarina AU - Simmet, Tobias AU - Ahmadi, Arash AU - Gershoni, David AU - Kasprzak, Jacek AU - Ludwig, Arne AU - Reitzenstein, Stephan AU - Wieck, Andreas AU - Reuter, Dirk AU - Müller, Kai AU - Finley, Jonathan J. ID - 33332 JF - Advanced Quantum Technologies KW - Electrical and Electronic Engineering KW - Computational Theory and Mathematics KW - Condensed Matter Physics KW - Mathematical Physics KW - Nuclear and High Energy Physics KW - Electronic KW - Optical and Magnetic Materials KW - Statistical and Nonlinear Physics SN - 2511-9044 TI - Quantum Dot Molecule Devices with Optical Control of Charge Status and Electronic Control of Coupling ER - TY - JOUR AU - Meier, Falco AU - Littmann, Mario AU - Bürger, Julius AU - Riedl, Thomas AU - Kool, Daniel AU - Lindner, Jörg AU - Reuter, Dirk AU - As, Donat Josef ID - 35232 JF - physica status solidi (b) KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 0370-1972 TI - Selective Area Growth of Cubic Gallium Nitride in Nanoscopic Silicon Dioxide Masks ER - TY - JOUR AB - ZusammenfassungIm Lehramtsstudium sollen Studierende grundlegende Fähigkeiten zur theoriegeleiteten Unterrichtsplanung erwerben. In Übereinstimmung mit Modellen zur professionellen Handlungskompetenz von Lehrkräften wird hierbei meist angenommen, dass das im Studienverlauf erworbene Professionswissen eine wesentliche Grundlage für den Aufbau von Fähigkeiten zur Unterrichtsplanung bildet. Lerngelegenheiten zur Anwendung dieses Professionswissens bieten vor allem schulpraktische Phasen im fortgeschrittenen Studienverlauf. Es wird aber ebenso angenommen, dass gerade Erfahrungen mit der Unterrichtsplanung den Aufbau von Professionswissen unterstützen. Der Zusammenhang zwischen dem Ausmaß des Professionswissens und der Entwicklung von Planungsfähigkeit ist bisher unzureichend empirisch geklärt. Eine besondere methodische Herausforderung besteht darin, Planungsfähigkeiten sowohl möglichst authentisch als auch auf standardisierte Weise zu erfassen. Zur Untersuchung des genannten Zusammenhangs wurde eine längsschnittliche Studie im Prä-Post-Design bei angehenden Physiklehrkräften (N = 68 im Längsschnitt) an vier Universitäten durchgeführt. Die Unterrichtsplanungsfähigkeit wurde mit Hilfe eines standardisierten Performanztests vor und nach dem Absolvieren eines Praxissemesters erfasst, indem als Standardsituation der Entwurf einer Unterrichtsstunde zum 3. Newton’schen Axiom unter definierten Zeitvorgaben im Praxissemester simuliert wurde. Zusätzlich wurden das fachliche, fachdidaktische und pädagogische Wissen der Studierenden mit Hilfe standardisierter Instrumente zu beiden Zeitpunkten erhoben, sowie die einschlägigen Lerngelegenheiten im Praxissemester über einen Fragebogen erfasst. Sowohl für Unterrichtsplanungsfähigkeit als auch für alle Wissensvariablen können Zuwächse im Praxissemester beobachtet werden. Cross-Lagged-Panel-Analysen zeigen, dass insbesondere die Ausprägung des fachdidaktischen und pädagogischen Wissens der Studierenden am Beginn des Praxissemesters die Entwicklung von Unterrichtsplanungsfähigkeit begünstigt. AU - Riese, Josef AU - Vogelsang, Christoph AU - Schröder, Jan AU - Borowski, Andreas AU - Kulgemeyer, Christoph AU - Reinhold, Peter AU - Schecker, Horst ID - 35524 IS - 4 JF - Zeitschrift für Erziehungswissenschaft KW - Education SN - 1434-663X TI - Entwicklung von Unterrichtsplanungsfähigkeit im Fach Physik: Welchen Einfluss hat Professionswissen? VL - 25 ER - TY - JOUR AB - ZusammenfassungEine zentrale Aufgabe fachdidaktischer Forschung stellt die Verbesserung schulischen Unterrichts dar. Die freie Bereitstellung wirksamer Unterrichtskonzeptionen zur Unterstützung des Selbststudiums von Lehrkräften bildet eine Strategie für eine flächendeckende Implementierung fachdidaktischer Innovationen. Allerdings etablieren sich zahlreiche, empirisch erfolgreich evaluierte Unterrichtskonzeptionen nicht nachhaltig an Schulen. Daher untersucht das vorliegende Forschungsvorhaben den Implementationsprozess solcher Materialien unter authentischen Bedingungen. Dazu wurde kriteriengeleitet eine evidenzbasierte, fachdidaktisch innovative Unterrichtskonzeption ausgewählt: das Münchener Unterrichtskonzept zur Quantenmechanik (MILQ). Diese wurde den teilnehmenden Lehrkräften fakultativ zur Verfügung gestellt. Mittels Fallstudien wurde die Implementierung von MILQ von elf Lehrkräften durch halbstandardisierte Interviews zu Beginn und am Ende einer Unterrichtsreihe zur Quantenmechanik sowie zwei Unterrichtsbeobachtungen mit je einem anschließenden stimulated recall explorativ erfasst. Die Probanden setzten sich überwiegend heuristisch mit MILQ auseinander und implementierten vor allem Elemente auf Sichtstrukturebene im Unterricht, die konform zu ihren bisherigen Vorstellungen waren. Dadurch wurde das fachdidaktische Innovationspotential nicht ausgeschöpft. Bezeichnend ist, dass der empirische Wirksamkeitsnachweis von MILQ für die Beurteilung der Lehrkräfte nicht relevant war, was aus theoretischer Sicht bislang als ein zentrales Argument der Bereitstellungsstrategie zur Implementierung fachdidaktischer Innovation angenommen wurde. AU - Breuer, Judith AU - Vogelsang, Christoph AU - Reinhold, Peter ID - 35525 IS - 1 JF - Zeitschrift für Didaktik der Naturwissenschaften KW - General Medicine SN - 0949-1147 TI - Nutzungsverhalten von Lehrkräften bei der Implementierung einer physikdidaktisch innovativen Unterrichtskonzeption VL - 28 ER - TY - JOUR AB - Following concepts describing lesson planning as a form of anticipatory reflection, preservice physics teachers’ reflection skills are assumed to be positively connected with their planning skills. However, empirical evidence on this is scarce. To explore how relations between these specific skills change over the course of a field experience controlling for influences of professional knowledge, we conduct a pre-post field study with N = 95 preservice physics teachers in a one-semester field experience. Content knowledge (CK) and pedagogical content knowledge (PCK) (paper-and-pencil tests), and reflection and planning skills (standardized performance assessments) were assessed before and after the field experience. Path analyses revealed almost no influence of reflection skills on planning skills. Reflections skills did not contribute to preservice teachers planning skills beyond knowledge, indicating both constructs might represent rather independent abilities. The results show the need for further development of models describing the development of teachers’ professional knowledge and skills in academic teacher education and for the development of concepts for a better integration of reflection and lesson planning in field experiences. AU - Vogelsang, Christoph AU - Kulgemeyer, Christoph AU - Riese, Josef ID - 35522 IS - 7 JF - Education Sciences KW - Public Administration KW - Developmental and Educational Psychology KW - Education KW - Computer Science Applications KW - Computer Science (miscellaneous) KW - Physical Therapy KW - Sports Therapy and Rehabilitation SN - 2227-7102 TI - Learning to Plan by Learning to Reflect?—Exploring Relations between Professional Knowledge, Reflection Skills, and Planning Skills of Preservice Physics Teachers in a One-Semester Field Experience VL - 12 ER - TY - CHAP AU - Van Dusen, Ben AU - Vogelsang, Christoph AU - Taylor, Joseph AU - Cauet, Eva ID - 35523 SN - 2662-8422 T2 - Physics Education TI - How to Teach a Teacher: Challenges and Opportunities in Physics Teacher Education in Germany and the USA ER - TY - JOUR AB - A process sequence enabling the large-area fabrication of nanopillar-patterned semiconductor templates for selective-area heteroepitaxy is developed. Herein, the nanopillar tops surrounded by a SiNx mask film serve as nanoscale growth areas. The molecular beam epitaxial growth of InAs on such patterned GaAs[Formula: see text]A templates is investigated by means of electron microscopy. It is found that defect-free nanoscale InAs islands grow selectively on the nanopillar tops at a substrate temperature of 425 °C. High-angle annular dark-field scanning transmission electron microscopy imaging reveals that for a growth temperature of 400 °C, the InAs islands show a tendency to form wurtzite phase arms extending along the lateral [Formula: see text] directions from the central zinc blende region of the islands. This is ascribed to a temporary self-catalyzed vapor–liquid–solid growth on [Formula: see text] B facets, which leads to a kinetically induced preference for the nucleation of the wurtzite phase driven by the local, instantaneous V/III ratio, and to a concomitant reduction of surface energy of the nanoscale diameter arms. AU - Riedl, Thomas AU - Kunnathully, Vinay S. AU - Verma, Akshay Kumar AU - Langer, Timo AU - Reuter, Dirk AU - Büker, Björn AU - Hütten, Andreas AU - Lindner, Jörg ID - 34056 IS - 18 JF - Journal of Applied Physics KW - General Physics and Astronomy SN - 0021-8979 TI - Selective area heteroepitaxy of InAs nanostructures on nanopillar-patterned GaAs(111)A VL - 132 ER - TY - JOUR AU - Riedl, Thomas AU - Kunnathully, Vinay AU - Trapp, Alexander AU - Langer, Timo AU - Reuter, Dirk AU - Lindner, Jörg ID - 34053 IS - 11 JF - Advanced Materials Interfaces KW - Mechanical Engineering KW - Mechanics of Materials SN - 2196-7350 TI - Size‐Dependent Strain Relaxation in InAs Quantum Dots on Top of GaAs(111)A Nanopillars VL - 9 ER - TY - CONF AU - Hörnlein, Madeleine AU - Kulgemeyer, Christoph ID - 35838 TI - Wie können Erklärvideos zum Erwerb physikalischen Konzeptwissens beitragen? ER - TY - JOUR AU - Bürger, Julius AU - Venugopal, Harikrishnan AU - Kool, Daniel AU - de los Arcos de Pedro, Maria Teresa AU - Gonzalez Orive, Alejandro AU - Grundmeier, Guido AU - Brassat, Katharina AU - Lindner, Jörg ID - 34086 IS - 26 JF - Advanced Materials Interfaces KW - General Medicine SN - 2196-7350 TI - High‐Resolution Study of Changes in Morphology and Chemistry of Cylindrical PS‐ b ‐PMMA Block Copolymer Nanomasks during Mask Development VL - 9 ER - TY - JOUR AU - Schapeler, Timon AU - Bartley, Tim ID - 33670 IS - 1 JF - Physical Review A SN - 2469-9926 TI - Information extraction in photon-counting experiments VL - 106 ER - TY - JOUR AB - Abstract We demonstrate the fabrication of micron-wide tungsten silicide superconducting nanowire single-photon detectors on a silicon substrate using laser lithography. We show saturated internal detection efficiencies with wire widths ranging from 0.59 µm to 1.43 µm under illumination at 1550 nm. We demonstrate both straight wires, as well as meandered structures. Single-photon sensitivity is shown in devices up to 4 mm in length. Laser-lithographically written devices allow for fast and easy structuring of large areas while maintaining a saturated internal efficiency for wire widths around 1 µm. AU - Protte, Maximilian AU - Verma, Varun B AU - Höpker, Jan Philipp AU - Mirin, Richard P AU - Woo Nam, Sae AU - Bartley, Tim ID - 33671 IS - 5 JF - Superconductor Science and Technology KW - Materials Chemistry KW - Electrical and Electronic Engineering KW - Metals and Alloys KW - Condensed Matter Physics KW - Ceramics and Composites SN - 0953-2048 TI - Laser-lithographically written micron-wide superconducting nanowire single-photon detectors VL - 35 ER - TY - JOUR AU - Lange, Nina Amelie AU - Höpker, Jan Philipp AU - Ricken, Raimund AU - Quiring, Viktor AU - Eigner, Christof AU - Silberhorn, Christine AU - Bartley, Tim ID - 30342 IS - 1 JF - Optica KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 2334-2536 TI - Cryogenic integrated spontaneous parametric down-conversion VL - 9 ER - TY - JOUR AB - Abstract Lithium niobate is a promising platform for integrated quantum optics. In this platform, we aim to efficiently manipulate and detect quantum states by combining superconducting single photon detectors and modulators. The cryogenic operation of a superconducting single photon detector dictates the optimisation of the electro-optic modulators under the same operating conditions. To that end, we characterise a phase modulator, directional coupler, and polarisation converter at both ambient and cryogenic temperatures. The operation voltage V π / 2 of these modulators increases, due to the decrease in the electro-optic effect, by 74% for the phase modulator, 84% for the directional coupler and 35% for the polarisation converter below 8.5 K . The phase modulator preserves its broadband nature and modulates light in the characterised wavelength range. The unbiased bar state of the directional coupler changed by a wavelength shift of 85 n m while cooling the device down to 5 K . The polarisation converter uses periodic poling to phasematch the two orthogonal polarisations. The phasematched wavelength of the utilised poling changes by 112 n m when cooling to 5 K . AU - Thiele, Frederik AU - vom Bruch, Felix AU - Brockmeier, Julian AU - Protte, Maximilian AU - Hummel, Thomas AU - Ricken, Raimund AU - Quiring, Viktor AU - Lengeling, Sebastian AU - Herrmann, Harald AU - Eigner, Christof AU - Silberhorn, Christine AU - Bartley, Tim ID - 33672 IS - 3 JF - Journal of Physics: Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 2515-7647 TI - Cryogenic electro-optic modulation in titanium in-diffused lithium niobate waveguides VL - 4 ER - TY - JOUR AB - Superconducting Nanowire Single Photon Detectors (SNSPDs) have become an integral part of quantum optics in recent years because of their high performance in single photon detection. We present a method to replace the electrical input by supplying the required bias current via the photocurrent of a photodiode situated on the cold stage of the cryostat. Light is guided to the bias photodiode through an optical fiber, which enables a lower thermal conduction and galvanic isolation between room temperature and the cold stage. We show that an off-the-shelf InGaAs–InP photodiode exhibits a responsivity of at least 0.55 A/W at 0.8 K. Using this device to bias an SNSPD, we characterize the count rate dependent on the optical power incident on the photodiode. This configuration of the SNSPD and photodiode shows an expected plateau in the single photon count rate with an optical bias power on the photodiode above 6.8 µW. Furthermore, we compare the same detector under both optical and electrical bias, and show there is no significant changes in performance. This has the advantage of avoiding an electrical input cable, which reduces the latent heat load by a factor of 100 and, in principle, allows for low loss RF current supply at the cold stage. AU - Thiele, Frederik AU - Hummel, Thomas AU - Protte, Maximilian AU - Bartley, Tim ID - 33673 IS - 8 JF - APL Photonics KW - Computer Networks and Communications KW - Atomic and Molecular Physics KW - and Optics SN - 2378-0967 TI - Opto-electronic bias of a superconducting nanowire single photon detector using a cryogenic photodiode VL - 7 ER - TY - JOUR AU - Henksmeier, Tobias AU - Schulz, Johann Friedemann AU - Kluth, Elias AU - Feneberg, Martin AU - Goldhahn, Rüdiger AU - Sanchez, Ana M. AU - Voigt, Markus AU - Grundmeier, Guido AU - Reuter, Dirk ID - 36804 JF - Journal of Crystal Growth TI - Remote epitaxy of In(x)Ga(1-x)As(001) on graphene covered GaAs(001) substrates VL - 593 ER - TY - BOOK AU - Kirsch, Alexander ID - 36572 TI - Professionalitätsentwicklung angehender Lehrkräfte ER - TY - CHAP AB - Inklusion ist als Thema aus dem deutschen Bildungssystem nicht mehr wegzudenken und trotzdem stellt sie weiterhin eine Herausforderung auf unterschiedlichen Ebenen dar. Die Qualifizierung der pädagogischen Fachkräfte ist dabei neben der Bereitstellung adäquater Rahmenbedingungen als ein besonders wichtiges Handlungsfeld zu betrachten. Die Bände der Reihe „Qualifizierung für Inklusion“ greifen den bestehenden Forschungs- und Entwicklungsbedarf auf und geben einen Überblick über die Ergebnisse der vom BMBF im Rahmen des Programms „Qualifzierung der pädagogischen Fachkräfte für inklusive Bildung“ geförderten Forschungsprojekte. Adressiert werden damit sowohl Wissenschaftler:innen als auch mit dem Themenfeld Inklusion befasste Personen und Institutionen der Aus-, Fort- und Weiterbildung, der Bildungsadministration und der Bildungspolitik. Der zweite Band der Reihe versammelt die Vorstellung von Projekten, Ergebnissen und Materialien, die sich dem Bildungsbereich der Grundschule zuordnen lassen. Die Reihe besteht aus drei weiteren Bänden, in denen die Ergebnisse zur Qualifizierung für Inklusion im Elementarbereich (Band 1), in der Sekundarstufe (Band 3) sowie in der Berufsschule, Hochschule und Erwachsenenbildung (Band 4) vorgestellt werden. AU - Hellmich, Frank AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Kirsch, Alexander AU - Blumberg, Eva AU - Schwab, Susanne ED - Buchhaupt, Felix ED - Becker, Jonas ED - Katzenbach, Dieter ED - Lutz, Deborah ED - Strecker, Alica ED - Urban, Michael ID - 35871 SN - 9783830945130 T2 - Qualifizierung für Inklusion. Grundschule TI - Kooperatives Unterrichten von Studierenden des Lehramts an Grund- und Förderschulen als Vorbereitung auf den inklusiven naturwissenschaftlichen Sachunterricht VL - 2 ER - TY - JOUR AB - ZusammenfassungIm vorliegenden Beitrag werden nach ausführlicher theoretischer Diskussion des Kompetenzbegriffs und der Definition von Kompetenz als Können ein Modell sachunterrichtlicher Planungskompetenz sowie ein daran anschließendes Messinstrument vorgestellt. Im Hinblick auf den Einsatz dieses Instrumentes im Rahmen einer Evaluation des nordrhein-westfälischen Praxissemesters stellen sich Fragen nach der psychometrischen Struktur der Testauswertung. Da das Instrument sowohl zur Testung von Sachunterrichtsstudierenden mit dem Lehramtsprofil ‚Grundschule‘ als auch von Sachunterrichtsstudierenden mit sonderpädagogischem Schwerpunkt eingesetzt werden soll, ist zu zeigen, dass die Testergebnisse nicht durch den gewählten Studiengang beeinflusst werden. Im Beitrag werden Rohdaten aus einer Studie an der Universität Paderborn (n = 121) genutzt, um eine fünfdimensionale Modellstruktur gegen eine eindimensionale zu testen und empirisch gestützte Argumente für eine mehrdimensionale Skalierung zu generieren. Durch Differential-Item-Functioning-Analysen wird geprüft, ob die Itemschwierigkeiten mit dem Merkmal ‚Studiengang‘ interagieren, sodass sie sich trotz gleicher Kompetenzausprägung für Untersuchungsteilnehmende beider Studierendengruppen signifikant unterscheiden und zu einer diagnostischen Verzerrung führen würden. Abschließend wird der beispielhafte Einsatz des Instrumentes im Rahmen einer Wirksamkeitsanalyse in Bezug die Effektivität des nordrhein-westfälischen Praxissemesters an der Universität Paderborn (n = 26) dargelegt. Aus den differenzierten Ergebnissen werden unter anderem erste Hinweise auf Defizite in der Lehrerinnen- und Lehrerausbildung abgeleitet. AU - Kirsch, Alexander ID - 36569 IS - 4 JF - Zeitschrift für Erziehungswissenschaft KW - Education SN - 1434-663X TI - Messung von Unterrichtsplanungskompetenz im Fach Sachunterricht: Empirische Befunde zur Kompetenzentwicklung angehender Grundschullehrkräfte auf Grundlage einer mehrdimensionalen Kompetenzstruktur VL - 25 ER - TY - CONF AU - Hellmich, Frank AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva ID - 36000 TI - The composition of pre-service teacher teams and primary school students’ competencies in (non-)inclusive science lessons. Oral Communication. Porto International Conference on Research in Education 2022 (ICRE 2022) ER - TY - CONF AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva AU - Hellmich, Frank ID - 35990 TI - Effects of Teacher Feedback on Primary School Students’ Self-Efficacy Beliefs and their Interest in Science Lessons. Single Paper. ECER (European Conference on Educational Research) 2022 PLUS. “Education in a Changing World: The impact of global realities on the prospects and experiences of educational research” ER - TY - CHAP AU - Tenberge, Claudia ED - Mammes, Ingelore ED - Rotter, Carolin ID - 39449 T2 - Professionalisierung von Grundschullehrkräften. TI - Ausbildung in der zweiten Phase der Lehrerbildung. ER - TY - BOOK AU - Möller, Kornelia AU - Eikmeyer, Birgit AU - Tenberge, Claudia AU - Wilke, Torben AU - Zolg, Monika ID - 39433 TI - Holz erleben. Technik verstehen. ER - TY - CONF AU - Schulze, Jan Roland AU - Blumberg, Eva AU - Hellmich, Frank ID - 36026 TI - Pre-Service Teachers’ Collaborative Lesson Planning and their Self-Concepts in Inclusive Education. Single Paper. EARLI SIG 11 Conference 2022 ‘Teaching and Teacher Education’. “Digital Transformation in Teaching and Teacher Education” ER - TY - JOUR AU - Tenberge, Claudia ID - 40059 JF - Grundschule Sachunterricht. TI - Schöpfen, gautschen, trocknen. Wassereinsatz in der Papierherstellung. VL - 95 ER - TY - CHAP AB - Das Lehrbuch umfasst Beiträge zur Einführung in den Inklusionsdiskurs, zu Modellen der Allgemeinen Didaktik und der inklusiven Didaktik, zur praxeologischen Unterrichtsforschung, zum Mathematik-, Deutsch-, Sach-, Kunst-, Religions-, Englisch- und Sportunterricht sowie Kommentare zum Zusammenhang der aufgeführten Themenbereiche. AU - Schröer, Franz AU - Tenberge, Claudia ED - Dexel, Timo ID - 36228 SN - 9783838556864 T2 - Inklusive (Fach-)Didaktik in der Primarstufe - Ein Lehrbuch TI - Theorien und Konzeptionen inklusiven Sachunterrichts ER - TY - CONF AU - Lenke, Michael AU - Tenberge, Claudia ED - Gill, David ED - Tuff, Jim ED - Kennedy, Thomas ED - Pendergast, Shawn ED - Jamil, Sana ID - 40048 TI - Future Primary Teacher Education: Computational Thinking and STEAM. ER - TY - JOUR AU - Tenberge, Claudia ID - 40062 JF - Grundschule Sachunterricht. TI - Über die Dächer der Welt. VL - 93 ER - TY - JOUR AU - Schröer, Franz AU - Tenberge, Claudia ID - 37642 JF - widerstreit Sachunterricht - Auf die Lehrkraft kommt es an? Professionalisierung von Lehrkräften für inklusiven Sachunterricht TI - Technisches Lernen im Sachunterricht inklusiv gestalten - Fördert ein inklusionssensibles Seminar in der universitären Lehrerbildung das Interesse und die Selbstwirksamkeitserwartung von Bachelorstudierenden? VL - 13 ER - TY - CHAP AU - Janicki, Nicole ED - Binder, Martin ED - Wiesmüller, Christian ED - Finkbeiner, Timo ID - 37902 KW - technology education KW - teacher professionalisation KW - Computational Thinking KW - digitalization KW - learning robots T2 - Technik: Verstehen wir, was wir nutzen!? - Tagungsband zur 23. Jahrestagung der Deutschen Gesellschaft für Technische Bildung in Mannheim vom 24.-25. September 2021. TI - Entwicklung und Evaluation eines Fortbildungskonzepts im Kontext der technischen Bildung an Grundschulen am Beispiel von Lernrobotern ER - TY - CONF AB - Theoretical approaches to the transformation towards an inclusive educational system in Germany mostly agree on the involvement of developmental tasks in subject related research (Hinz, 2011). The common understanding of inclusion as a process geared towards equal participation of all children (Booth, 2012) requires a reflexive questioning of established values, attitudes and practices in order to develop inclusive subject related research, teacher training and teaching and learning (Pech & Schomaker, 2013). Among other things, this results in consequences for the design of pre- service teacher training. To a large extent, teacher education is driven by the promotion of central competencies, interests and self-efficacy (Baumert & Kunter, 2011). It aims towards the development and realisation of inclusive interdisciplinary science and social studies (‘Sachunterricht’) in primary education (Moser, 2018). In conjunction with largely acknowledged constructivist approaches to teaching and learning (Möller, 2001), the development of personality, the consideration of basic needs (Deci & Ryan, 1993) and promotion of individual potentials are repeatedly fundamentally represented in subject related and pedagogical considerations (Feuser, 1989; GDSU, 2013). Therefore, the aforementioned constructivist approach is connected to several certain key paradigms for teaching and learning processes (e.g., Vygotskij, 1978; Posner et al., 1982; van de Pol et al., 2010). In this regard, the nature of primary school students’ basic needs have empirically not been sufficiently studied yet. Theoretical frameworks from motivational psychology (Deci & Ryan, 1993) do not explicitly address how individual needs differ and how the diversity of needs can be included in joint-learning, multi-perspective technology education classes. The research project the present paper is part of aims to develop a research-based concept for the professionalisation of pre-service teachers in a seminar course. Therefore, the promotion of the pre- service teachers’ interests and self-efficacy expectations have been assessed in a pre-post research design with a control group visiting another course not related to technology education and inclusion. The present paper describes and discusses first results of the project and will give an outlook on subsequent developmental tasks. AU - Schröer, Franz AU - Tenberge, Claudia ED - Gill, David ED - Tuff, Jim ED - Kennedy, Thomas ED - Pendergast, Shawn ED - Jamil, Sana ID - 40046 KW - Inclusion KW - basic needs KW - pre-service teacher training KW - interest KW - self-efficacy T2 - PATT39 - PATT on the Edge Technology, Innovation and Education TI - How to enable pre-service teachers to design technological teaching and learning inclusively? – On the nature and consideration of basic needs in teacher training ER - TY - GEN ED - Diederich, Julia ED - Schröer, Franz ID - 40055 SN - 2196-9191 TI - GDSU-Journal VL - 13 ER - TY - JOUR AU - Brenke, Laurien AU - Kirsch, Alexander AU - Blumberg, Eva ID - 40033 JF - GDSU-Journal TI - (Selbst-)Einschätzungen zum Herausforderungsbereich Digitalisierung in Schule und Hochschule – Eine empirische Online-Befragung bei Sachunterrichtsstudierenden an der Universität Paderborn VL - Heft 13 ER - TY - CONF AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva AU - Hellmich, Frank ID - 35921 TI - Effekte des Feedbacks von Lehrkräften auf die Selbstwirksamkeitsüberzeugungen und die intrinsische Motivation von Kindern im naturwissenschaftlichen Sachunterricht der Grundschule. Vortrag. 30. Jahrestagung der Kommission "Grundschulforschung und Pädagogik der Primarstufe" der Deutschen Gesellschaft für Erziehungswissenschaft (DGfE, Sektion Schulpädagogik). Thema: "Nachhaltige Bildung in der Grundschule" ER - TY - CONF AU - Hellmich, Frank AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva ID - 36009 TI - Pre-service teachers’ team-teaching practices and children’s competence development in inclusive schools. Single Paper. EARLI SIG 11 Conference 2022 ‘Teaching and Teacher Education’. “Digital Transformation in Teaching and Teacher Education” ER - TY - CONF AU - Schroeder, René AU - Blumberg, Eva AU - Miller, Susanne AU - Kottmann, Brigitte AU - Reh, Anne AU - Franzen, Katja ID - 40453 TI - DiPoSa: Didaktisch-diagnostische Potentiale des inklusionsorientierten Sachunterrichts: Identifizieren, Konzeptualisieren und Implementieren. Vortrag auf der Auftaktveranstaltung zur BMBF-Förderrichtlinie „Förderbezogene Diagnostik in der inklusiven Bildung“ im Rahmen des BMBF-Metavorhabens „Qualifizierung für inklusive Bildung“ ER - TY - CONF AU - Janicki, Nicole AU - Tenberge, Claudia ED - Gill, David ED - Tuff, Jim ED - Kennedy, Thomas ED - Pendergast, Shawn ED - Jamil, Sana ID - 40054 TI - Technology Education in Elementary School Using the Example of 'Learning Robots' – Development and Evaluation of an In-Service Teacher Training Concept. ER - TY - JOUR AU - Blumberg, Eva AU - Brenke, Laurien AU - Schürmann, Michelle AU - Gövert, André ID - 40019 JF - Das Projekt "Vielfalt stärken" TI - Vielfalt stärken im naturwissenschaftlich-technischen Sachunterricht – Mehrperspektivische Sichtweisen zur Nutzung sprachlicher und kultureller Heterogenität im Sachunterricht der Grundschule und in der sachunterrichtsdidaktischen Lehrer*innenausbildung ER - TY - JOUR AU - Thonemann, Lisa AU - Deutschen, Katrin AU - Lakemeyer, Jana Marie AU - Reh, Anne AU - Blumberg, Eva ID - 40034 JF - GDSU-Journal TI - Sachunterricht lehren in Zeiten der Pandemie – Eine Online-Befragung zu den Auswirkungen der digitalen Lehre auf den Materialeinsatz in der sachunterrichtsdidaktischen Hochschulausbildung VL - Heft 13 ER - TY - JOUR AU - Tänzer, Sandra AU - Lauterbach, Roland AU - Blumberg, Eva AU - Grittner, Frauke AU - Lange, Jochen AU - Schomaker, Claudia ID - 40030 JF - GDSU-Journal TI - Sachunterricht begründet planen – Das Prozessmodell Generativer Unterrichtsplanung Sachunterricht (GUS) VL - Heft 13 ER - TY - CONF AU - Hellmich, Frank AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva ID - 35919 TI - Effects of the composition of pre-service teacher teams on primary school students’ competencies in (non-)inclusive science lessons. Paper Presentation. EARLI SIG 15 Biennial Conference 2022 `Special Educational Needs´. “A Village to Teach a Child – The Influence of Contextual Factors on Learning and Development” ER - TY - JOUR AU - Deppe, Franziska AU - Reh, Anne AU - Blumberg, Eva ID - 40038 JF - GDSU-Journal TI - Digitales Sachunterrichtsstudium in der Corona-Krise – Eine empirische Evaluationsstudie zur Rezeption des Unterstützungsangebots des Paderborner Lernzentrums „Sachunterrichtstreff“ bei Sachunterrichtsstudierenden im Grund- und Förderschullehramt VL - Heft 13 ER - TY - CONF AU - Schulze, Jan Roland AU - Crummenerl, Lena Luise AU - Sicking, Annika AU - Temmen, Katrin AU - Blumberg, Eva ID - 40450 TI - Effects on primary and secondary school students’ academic out-of-school learning experiences in Science Technology Engineering Mathematics (STEM) education. Single Paper. ECER (European Conference on Educational Research) 2022 PLUS. “Education in a Changing World: The impact of global realities on the prospects and experiences of educational research” ER - TY - CONF AU - Hellmich, Frank AU - Hoya, Fabian Karl AU - Schulze, Jan Roland AU - Blumberg, Eva ID - 40452 TI - The composition of pre-service teacher teams and primary school students’ competencies in (non-)inclusive science lessons. Oral Communication. Porto International Conference on Research in Education 2022 (ICRE 2022), Polytechnic of Porto, Centre for Research and Innovation in Education (inED) of the School of Education ER - TY - JOUR AU - Meyer-Scott, Evan AU - Prasannan, Nidhin AU - Dhand, Ish AU - Eigner, Christof AU - Quiring, Viktor AU - Barkhofen, Sonja AU - Brecht, Benjamin AU - Plenio, Martin B. AU - Silberhorn, Christine ID - 40273 IS - 15 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Scalable Generation of Multiphoton Entangled States by Active Feed-Forward and Multiplexing VL - 129 ER - TY - CONF AU - Franzen, Katja AU - Blumberg, Eva AU - Schroeder, René AU - Reh, Anne AU - Miller, Susanne AU - Kottmann, Brigitte ID - 40451 TI - Inclusive science teaching in primary schools and its didactic-diagnostic potential. Single Paper. Porto International Conference on Research in Education 2022 (ICRE 2022) ER - TY - JOUR AB - Multimode integrated interferometers have great potential for both spectral engineering and metrological applications. However, the material dispersion of integrated platforms constitutes an obstacle that limits the performance and precision of such interferometers. At the same time, two-colour nonlinear interferometers present an important tool for metrological applications, when measurements in a certain frequency range are difficult. In this manuscript, we theoretically developed and investigated an integrated multimode two-colour SU(1,1) interferometer operating in a supersensitive mode. By ensuring the proper design of the integrated platform, we suppressed the dispersion, thereby significantly increasing the visibility of the interference pattern. The use of a continuous wave pump laser provided the symmetry between the spectral shapes of the signal and idler photons concerning half the pump frequency, despite different photon colours. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to 3×104 photons are generated. AU - Ferreri, Alessandro AU - Sharapova, Polina R. ID - 40371 IS - 3 JF - Symmetry KW - Physics and Astronomy (miscellaneous) KW - General Mathematics KW - Chemistry (miscellaneous) KW - Computer Science (miscellaneous) SN - 2073-8994 TI - Two-Colour Spectrally Multimode Integrated SU(1,1) Interferometer VL - 14 ER - TY - JOUR AB - The free exciton transition (near-band-edge emission, NBE) of ZnO at ≈388 nm can be strongly enhanced and even stimulated by an underlying photonic structure. 1D Photonic crystals, so-called distributed Bragg reflectors, are utilized to suppress the deep-level emission of ZnO (DLE, ≈500–530 nm). The reflector stacks are fabricated in a layer-by-layer procedure by wet-chemical synthesis. They consist of low-ε porous SiO2 layers and high-ε TiO2 layers. Varying the thickness of the SiO2 layers allows tuning the optical bandgap in a wide range between ≈420 and 800 nm. A ZnO layer is deposited on top of the reflector stacks by sol–gel synthesis. The spontaneous photoluminescence (PL) emission of the ZnO film is modulated by the photonic structure. When the optical bandgap of the reflector is in resonance with the deep-level emission of ZnO (DLE, ≈500–530 nm), then this defect-related emission mode is suppressed. Strong NBE emission is observed even when the ZnO layer does not show any NBE emission (due to low crystallinity) in the absence of the photonic structure. With this cost-efficient synthesis method, emitters for, e.g., luminescent gas sensors can be fabricated. AU - Kothe, Linda AU - Albert, Maximilian AU - Meier, Cedrik AU - Wagner, Thorsten AU - Tiemann, Michael ID - 29790 JF - Advanced Materials Interfaces KW - Mechanical Engineering KW - Mechanics of Materials SN - 2196-7350 TI - Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors ER - TY - JOUR AB - With the rapid advances of functional dielectric metasurfaces and their integration on on-chip nanophotonic devices, the necessity of metasurfaces working in different environments, especially in biological applications, arose. However, the metasurfaces’ performance is tied to the unit cell’s efficiency and ultimately the surrounding environment it was designed for, thus reducing its applicability if exposed to altering refractive index media. Here, we report a method to increase a metasurface’s versatility by covering the high-index metasurface with a low index porous SiO2 film, protecting the metasurface from environmental changes while keeping the working efficiency unchanged. We show, that a covered metasurface retains its functionality even when exposed to fluidic environments. AU - Geromel, René AU - Weinberger, Christian AU - Brormann, Katja AU - Tiemann, Michael AU - Zentgraf, Thomas ID - 28254 IS - 1 JF - Optical Materials Express SN - 2159-3930 TI - Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions VL - 12 ER - TY - JOUR AB - Abstract The interaction between quantum light and matter is being intensively studied for systems that are enclosed in high-Q cavities which strongly enhance the light–matter coupling. Cavities with low Q-factors are generally given less attention due to their high losses that quickly destroy quantum systems. However, bad cavities can be utilized for several applications, where lower Q-factors are required, e.g., to increase the spectral width of the cavity mode. In this work, we demonstrate that low-Q cavities can be beneficial for preparing specific electronic steady states when certain quantum states of light are applied. We investigate the interaction between quantum light with various statistics and matter represented by a Λ-type three-level system in lossy cavities, assuming that cavity losses are the dominant loss mechanism. We show that cavity losses lead to non-trivial electronic steady states that can be controlled by the loss rate and the initial statistics of the quantum fields. We discuss the mechanism of the formation of such steady states on the basis of the equations of motion and present both analytical expressions and numerical simulations for such steady states. AU - Rose, Hendrik AU - Tikhonova, O V AU - Meier, Torsten AU - Sharapova, Polina ID - 37318 IS - 6 JF - New Journal of Physics KW - General Physics and Astronomy SN - 1367-2630 TI - Steady states of Λ-type three-level systems excited by quantum light with various photon statistics in lossy cavities VL - 24 ER - TY - JOUR AU - Grisard, S. AU - Rose, Hendrik AU - Trifonov, A. V. AU - Reichhardt, R. AU - Reiter, D. E. AU - Reichelt, Matthias AU - Schneider, C. AU - Kamp, M. AU - Höfling, S. AU - Bayer, M. AU - Meier, Torsten AU - Akimov, I. A. ID - 37319 IS - 20 JF - Physical Review B SN - 2469-9950 TI - Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses VL - 106 ER - TY - CONF AU - Trautmann, Alexander AU - Zuo, Ruixin AU - Wang, Guifang AU - Hannes, Wolf-Rüdiger AU - Yang, Shidong AU - Thong, Le Huu AU - Ngo, Cong AU - Steiner, Johannes AU - Ciappina, Marcelo AU - Reichelt, Matthias AU - Duc, Huynh Thanh AU - Song, Xiaohong AU - Yang, Weifeng AU - Meier, Torsten ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 37329 T2 - Ultrafast Phenomena and Nanophotonics XXVI TI - Microscopic simulations of high harmonic generation from semiconductors VL - 11999 ER - TY - CONF AU - Rose, Hendrik AU - Tikhonova, Olga V. AU - Meier, Torsten AU - Sharapova, Polina ED - Betz, Markus ED - Elezzabi, Abdulhakem Y. ID - 37327 T2 - Ultrafast Phenomena and Nanophotonics XXVI TI - Theoretical analysis of correlations between two quantum fields exciting a three-level system using the cluster-expansion approach VL - 11999 ER - TY - JOUR AU - Paul, J. AU - Rose, Hendrik AU - Swagel, E. AU - Meier, Torsten AU - Wahlstrand, J. K. AU - Bristow, A. D. ID - 37323 IS - 11 JF - Physical Review B SN - 2469-9950 TI - Coherent contributions to population dynamics in a semiconductor microcavity VL - 105 ER - TY - GEN AU - Meier, Torsten AU - Ali, Usman ID - 37325 T2 - Condensed Matter TI - Super-Bloch oscillations with parametric modulation of a parabolic trap ER - TY - JOUR AB - AbstractTailored 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. AU - Jonas, B. AU - Heinze, Dirk Florian AU - Schöll, E. AU - Kallert, P. AU - Langer, T. AU - Krehs, S. AU - Widhalm, A. AU - Jöns, Klaus AU - Reuter, Dirk AU - Schumacher, Stefan AU - Zrenner, Artur ID - 40523 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry KW - Multidisciplinary SN - 2041-1723 TI - Nonlinear down-conversion in a single quantum dot VL - 13 ER - TY - JOUR AU - Long, Teng AU - Ma, Xuekai AU - Ren, Jiahuan AU - Li, Feng AU - Liao, Qing AU - Schumacher, Stefan AU - Malpuech, Guillaume AU - Solnyshkov, Dmitry AU - Fu, Hongbing ID - 33080 IS - 29 JF - Advanced Science KW - General Physics and Astronomy KW - General Engineering KW - Biochemistry KW - Genetics and Molecular Biology (miscellaneous) KW - General Materials Science KW - General Chemical Engineering KW - Medicine (miscellaneous) SN - 2198-3844 TI - Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity VL - 9 ER - TY - JOUR AU - Li, Yao AU - Ma, Xuekai AU - Zhai, Xiaokun AU - Gao, Meini AU - Dai, Haitao AU - Schumacher, Stefan AU - Gao, Tingge ID - 32310 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry KW - Multidisciplinary SN - 2041-1723 TI - Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature VL - 13 ER - TY - JOUR AU - Praschan, Tom AU - Heinze, Dirk AU - Breddermann, Dominik AU - Zrenner, Artur AU - Walther, Andrea AU - Schumacher, Stefan ID - 40431 IS - 4 JF - Physical Review B SN - 2469-9950 TI - Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton VL - 105 ER - TY - JOUR AU - Gao, Xinghui AU - Hu, Wei AU - Schumacher, Stefan AU - Ma, Xuekai ID - 32148 IS - 13 JF - Optics Letters KW - Atomic and Molecular Physics KW - and Optics SN - 0146-9592 TI - Unidirectional vortex waveguides and multistable vortex pairs in polariton condensates VL - 47 ER - TY - JOUR AU - Li, Yao AU - Ma, Xuekai AU - Hatzopoulos, Zaharias AU - Savvidis, Pavlos G. AU - Schumacher, Stefan AU - Gao, Tingge ID - 31937 IS - 6 JF - ACS Photonics SN - 2330-4022 TI - Switching Off a Microcavity Polariton Condensate near the Exceptional Point VL - 9 ER - TY - DATA AU - Jonas, Björn AU - Heinze, Dirk Florian AU - Schöll, Eva AU - Kallert, Patricia AU - Langer, Timo AU - Krehs, Sebastian AU - Widhalm, Alex AU - Jöns, Klaus AU - Reuter, Dirk AU - Zrenner, Artur ID - 40428 TI - Nonlinear down-conversion in a single quantum dot ER - TY - CHAP AB - Lithium niobate (LiNbO3), a material frequently used in optical applications, hosts different kinds of polarons that significantly affect many of its physical properties. In this study, a variety of electron polarons, namely free, bound, and bipolarons, are analyzed using first-principles calculations. We perform a full structural optimization based on density-functional theory for selected intrinsic defects with special attention to the role of symmetry-breaking distortions that lower the total energy. The cations hosting the various polarons relax to a different degree, with a larger relaxation corresponding to a larger gap between the defect level and the conduction-band edge. The projected density of states reveals that the polaron states are formerly empty Nb 4d states lowered into the band gap. Optical absorption spectra are derived within the independent-particle approximation, corrected by the GW approximation that yields a wider band gap and by including excitonic effects within the Bethe-Salpeter equation. Comparing the calculated spectra with the density of states, we find that the defect peak observed in the optical absorption stems from transitions between the defect level and a continuum of empty Nb 4d states. Signatures of polarons are further analyzed in the reflectivity and other experimentally measurable optical coefficients. AU - Schmidt, Falko AU - Kozub, Agnieszka L. AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero AU - Schindlmayr, Arno ED - Corradi, Gábor ED - Kovács, László ID - 30288 SN - 978-3-0365-3340-7 T2 - New Trends in Lithium Niobate: From Bulk to Nanocrystals TI - Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response ER - TY - JOUR AB - AbstractPolarons influence decisively the performance of lithium niobate for optical applications. In this work, the formation of (defect) bound polarons in lithium niobate is studied by ab initio molecular dynamics. The calculations show a broad scatter of polaron formation times. Rising temperature increases the share of trajectories with long formation times, which leads to an overall increase of the average formation time with temperature. However, even at elevated temperatures, the average formation time does not exceed the value of 100 femtoseconds, i.e., a value close to the time measured for free, i.e., self-trapped polarons. Analyzing individual trajectories, it is found that the time required for the structural relaxation of the polarons depends sensitively on the excitation of the lithium niobate high-frequency phonon modes and their phase relation. AU - Krenz, Marvin AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero ID - 37711 JF - Applied Physics A KW - General Materials Science KW - General Chemistry SN - 0947-8396 TI - Bound polaron formation in lithium niobate from ab initio molecular dynamics VL - 128 ER - TY - CONF AB - We demonstrate theoretically and experimentally complex correlations in the photon numbers of two-mode quantum states using measurement-induced nonlinearity. For this, we combine the interference of coherent states and single photons with photon sub-traction. AU - Meier, Torsten AU - Hoepker, Jan Philipp AU - Protte, Maximilian AU - Eigner, Christof AU - Silberhorn, Christine AU - Sharapova, Polina R. AU - Sperling, Jan AU - Bartley, Tim ID - 43744 SN - 978-1-957171-05-0 T2 - Conference on Lasers and Electro-Optics: Applications and Technology TI - Two-Mode Photon-Number Correlations Created by Measurement-Induced Nonlinearity ER - TY - JOUR AB - We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Furthermore, we create so-called gray tracking in KTP and investigate the ionic conductivity in theses areas. A local unintended reduction of the ionic conductivity is observed in the gray-tracked regions, which also induce additional optical absorption in the material. We show that a thermal treatment in an oxygen-rich atmosphere removes the gray tracking and brings the ionic conductivity as well as the optical transmission back to the original level. These studies can help to choose the best material and treatment for specific applications. AU - Padberg, Laura AU - Quiring, Viktor AU - Bocchini, Adriana AU - Santandrea, Matteo AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero AU - Silberhorn, Christine AU - Eigner, Christof ID - 33484 JF - Crystals SN - 2073-4352 TI - DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking VL - 12 ER - TY - JOUR AB - Lithium niobate on insulator (LNOI) has a great potential for photonic integrated circuits, providing substantial versatility in design of various integrated components. To properly use these components in the implementation of different quantum protocols, photons with different properties are required. In this paper, we theoretically demonstrate a flexible source of correlated photons built on the LNOI waveguide of a special geometry. This source is based on the parametric down-conversion (PDC) process, in which the signal and idler photons are generated at the telecom wavelength and have different spatial profiles and polarizations, but the same group velocities. Distinguishability in polarizations and spatial profiles facilitates the routing and manipulating individual photons, while the equality of their group velocities leads to the absence of temporal walk-off between photons. We show how the spectral properties of the generated photons and the number of their frequency modes can be controlled depending on the pump characteristics and the waveguide length. Finally, we discuss special regimes, in which narrowband light with strong frequency correlations and polarization-entangled Bell states are generated at the telecom wavelength. AU - Ebers, Lena AU - Ferreri, Alessandro AU - Hammer, Manfred AU - Albert, Maximilian AU - Meier, Cedrik AU - Förstner, Jens AU - Sharapova, Polina R. ID - 30210 JF - Journal of Physics: Photonics KW - tet_topic_waveguide SN - 2515-7647 TI - Flexible source of correlated photons based on LNOI rib waveguides VL - 4 ER - TY - JOUR AB - Many-body perturbation theory based on density-functional theory calculations is used to determine the quasiparticle band structures and the dielectric functions of the isomorphic ferroelectrics rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenide (KTiOAsO4). Self-energy corrections of more than 2 eV are found to widen the transport band gaps of both materials considerably to 5.3 and 5.2 eV, respectively. At the same time, both materials are characterized by strong exciton binding energies of 1.4 and 1.5 eV, respectively. The solution of the Bethe-Salpeter equation based on the quasiparticle energies results in onsets of the optical absorption within the range of the measured data. AU - Neufeld, Sergej AU - Schindlmayr, Arno AU - Schmidt, Wolf Gero ID - 26627 IS - 1 JF - Journal of Physics: Materials TI - Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4 VL - 5 ER - TY - JOUR AU - Glahn, Luis Joel AU - Ruiz Alvarado, Isaac Azahel AU - Neufeld, Sergej AU - Zare Pour, Mohammad Amin AU - Paszuk, Agnieszka AU - Ostheimer, David AU - Shekarabi, Sahar AU - Romanyuk, Oleksandr AU - Moritz, Dominik Christian AU - Hofmann, Jan Philipp AU - Jaegermann, Wolfram AU - Hannappel, Thomas AU - Schmidt, Wolf Gero ID - 37656 IS - 11 JF - physica status solidi (b) KW - Condensed Matter Physics KW - Electronic KW - Optical and Magnetic Materials SN - 0370-1972 TI - Clean and Hydrogen‐Adsorbed AlInP(001) Surfaces: Structures and Electronic Properties VL - 259 ER - TY - JOUR AU - Ruiz Alvarado, Isaac Azahel AU - Schmidt, Wolf Gero ID - 37710 IS - 23 JF - ACS Omega KW - General Chemical Engineering KW - General Chemistry SN - 2470-1343 TI - Water/InP(001) from Density Functional Theory VL - 7 ER - TY - JOUR AU - Moritz, Dominik Christian AU - Ruiz Alvarado, Isaac Azahel AU - Zare Pour, Mohammad Amin AU - Paszuk, Agnieszka AU - Frieß, Tilo AU - Runge, Erich AU - Hofmann, Jan P. AU - Hannappel, Thomas AU - Schmidt, Wolf Gero AU - Jaegermann, Wolfram ID - 37681 IS - 41 JF - ACS Applied Materials & Interfaces KW - General Materials Science SN - 1944-8244 TI - P-Terminated InP (001) Surfaces: Surface Band Bending and Reactivity to Water VL - 14 ER - TY - JOUR AU - Karmo, Marsel AU - Ruiz Alvarado, Isaac Azahel AU - Schmidt, Wolf Gero AU - Runge, Erich ID - 37714 IS - 6 JF - ACS Omega KW - General Chemical Engineering KW - General Chemistry SN - 2470-1343 TI - Reconstructions of the As-Terminated GaAs(001) Surface Exposed to Atomic Hydrogen VL - 7 ER - TY - CHAP AB - Dieses Format eignet sich, um zu prüfen, inwieweit Studierende Computersimulationen und eigene kleine Programme zur Lösung typischer Probleme ihres Fachs nutzen können. Wie bei Klausuren erfolgt die Bearbeitung in begrenzter Zeit und unter Aufsicht, wird aber am Computer durchgeführt und beinhaltet neben der Programmierung auch vor- und nachbereitende Aufgaben im Kontext der fachlichen Anwendung. AU - Schindlmayr, Arno ED - Gerick, Julia ED - Sommer, Angela ED - Zimmermann, Germo ID - 29808 SN - 9783825258597 T2 - Kompetent Prüfungen gestalten: 60 Prüfungsformate für die Hochschullehre TI - Programmierung und Computersimulationen ER - TY - JOUR AU - Prasannan, Nidhin AU - Sperling, Jan AU - Brecht, Benjamin AU - Silberhorn, Christine ID - 34884 IS - 26 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Direct Measurement of Higher-Order Nonlinear Polarization Squeezing VL - 129 ER - TY - JOUR AB - Lewis-acid doping of organic semiconductors (OSCs) opens up new ways of p-type doping and has recently become of significant interest. AU - Bauch, Fabian AU - Dong, Chuan-Ding AU - Schumacher, Stefan ID - 40423 IS - 22 JF - RSC Advances KW - General Chemical Engineering KW - General Chemistry SN - 2046-2069 TI - Protonation-induced charge transfer and polaron formation in organic semiconductors doped by Lewis acids VL - 12 ER - TY - JOUR AU - Gao, Ying AU - Li, Yao AU - Ma, Xuekai AU - Gao, Meini AU - Dai, Haitao AU - Schumacher, Stefan AU - Gao, Tingge ID - 34094 IS - 20 JF - Applied Physics Letters KW - Physics and Astronomy (miscellaneous) SN - 0003-6951 TI - Tilting nondispersive bands in an empty microcavity VL - 121 ER - TY - JOUR AU - Bathe, Thomas AU - Dong, Chuan-Ding AU - Schumacher, Stefan ID - 40425 IS - 13 JF - The Journal of Physical Chemistry A KW - Physical and Theoretical Chemistry SN - 1089-5639 TI - Microscopic Study of Molecular Double Doping VL - 126 ER - TY - JOUR AU - Murzakhanov, Fadis F. AU - Mamin, Georgy Vladimirovich AU - Orlinskii, Sergei Borisovich AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero AU - Biktagirov, Timur AU - Aharonovich, Igor AU - Gottscholl, Andreas AU - Sperlich, Andreas AU - Dyakonov, Vladimir AU - Soltamov, Victor A. ID - 37713 IS - 7 JF - Nano Letters KW - Mechanical Engineering KW - Condensed Matter Physics KW - General Materials Science KW - General Chemistry KW - Bioengineering SN - 1530-6984 TI - Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized VB Spin States in hBN VL - 22 ER - TY - JOUR AU - Bocchini, Adriana AU - Gerstmann, Uwe AU - Bartley, Tim AU - Steinrück, Hans-Georg AU - Henkel, Gerald AU - Schmidt, Wolf Gero ID - 33965 JF - Phys. Rev. Materials TI - Electrochemical performance of KTiOAsO_4 (KTA) in potassium-ion batteries from density-functional theory VL - 6 ER - TY - JOUR AU - Bocchini, Adriana AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero ID - 31254 JF - Phys. Rev. B TI - Oxygen vacancies in KTiOPO_4: Optical absorption from hybrid DFT VL - 105 ER - TY - JOUR AB - Inspired by plant grafting, grafted vortex beams can be formed through grafting two or more helical phase profiles of optical vortex beams. Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties and potential applications. However, the current method to generate and manipulate GPVBs requires a complex and bulky optical system, hindering further investigation and limiting its practical applications. Here, a compact metasurface approach for generating and manipulating GPVBs in multiple channels is proposed and demonstrated, which eliminates the need for such a complex optical setup. A single metasurface is utilized to realize various superpositions of GPVBs with different combinations of topological charges in four channels, leading to asymmetric singularity distributions. The positions of singularities in the superimposed beam can be further modulated by introducing an initial phase difference in the metasurface design. The work demonstrates a compact metasurface platform that performs a sophisticated optical task that is very challenging with conventional optics, opening opportunities for the investigation and applications of GPVBs in a wide range of emerging application areas, such as singular optics and quantum science. AU - Ahmed, Hammad AU - Intaravanne, Yuttana AU - Ming, Yang AU - Ansari, Muhammad Afnan AU - Buller, Gerald S. AU - Zentgraf, Thomas AU - Chen, Xianzhong ID - 32068 IS - 30 JF - Advanced Materials KW - Mechanical Engineering KW - Mechanics of Materials KW - General Materials Science SN - 0935-9648 TI - Multichannel Superposition of Grafted Perfect Vortex Beams VL - 34 ER - TY - JOUR AU - Große-Heilmann, Rike Isabel AU - Riese, Josef AU - Burde, Jan-Phillip AU - Schubatzky, Thomas AU - Weiler, David ID - 45174 JF - Education Sciences TI - Fostering Pre-Service Physics Teachers’ Pedagogical Content Knowledge Regarding Digital Media VL - 12 ER - TY - CONF AU - Riese, Josef AU - Schröder, Jan AU - Vogelsang, Christoph ED - Habig, Sebastian ID - 45298 T2 - Unsicherheit als Element von naturwissenschaftsbezogenen Bildungsprozessen. Gesellschaft für Didaktik der Chemie und Physik. Online Jahrestagung 2021 TI - Die Entwicklung physikdidaktischen Wissens im Längsschnitt VL - 42 ER - TY - JOUR AB - Praktische Tätigkeiten und Handlungen besitzen im allgemeinbildenden Technikunterricht hohen Stellenwert, wenn z.B. Maschinen bedient und Artefakte konstruiert und gefertigt werden. Im Rahmen der Lehramtsausbildung sollten Techniklehrkräfte deswegen best-möglich auf die Anwendung und Durchführung fachpraktischer Handlungen vorbereitet werden. Ziel dieser Arbeit ist es daher, im Rahmen des Lehramtsstudiengangs Technik der RWTH Aachen ein Fachpraktikum zu entwickeln, in dem berufsrelevante fachpraktische Kompetenzen erworben werden. Die empirisch gestützte Entwicklung des Fachpraktikums erfolgt als iterativer Prozess und wird durch das Modell der Didaktischen Rekonstruktion strukturiert, nach welchem die fach-liche Klärung gleichwertig zur Betrachtung der Studierendenperspektive berücksichtigt wird. AU - Ermel, Dorothee AU - Riese, Josef ID - 45175 IS - 1 JF - Journal of Technical Education TI - Entwicklung und Evaluation eines Fachpraktikums für das Techniklehramt VL - 10 ER -