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 -