@article{40274,
author = {{Zhai, Xiaokun and Ma, Xuekai and Gao, Ying and Xing, Chunzi and Gao, Meini and Dai, Haitao and Wang, Xiao and Pan, Anlian and Schumacher, Stefan and Gao, Tingge}},
journal = {{Physical Review Letters}},
number = {{13}},
pages = {{136901}},
title = {{{Electrically controlling vortices in a neutral exciton polariton condensate at room temperature}}},
doi = {{10.1103/PhysRevLett.131.136901}},
volume = {{131}},
year = {{2023}},
}
@article{36416,
author = {{De, Jianbo and Ma, Xuekai and Yin, Fan and Ren, Jiahuan and Yao, Jiannian and Schumacher, Stefan and Liao, Qing and Fu, Hongbing and Malpuech, Guillaume and Solnyshkov, Dmitry}},
issn = {{0002-7863}},
journal = {{Journal of the American Chemical Society (JACS)}},
keywords = {{Colloid and Surface Chemistry, Biochemistry, General Chemistry, Catalysis}},
number = {{3}},
pages = {{1557--1563}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates}}},
doi = {{10.1021/jacs.2c07557}},
volume = {{145}},
year = {{2023}},
}
@article{35077,
author = {{Liang, Qian and Ma, Xuekai and Long, Teng and Yao, Jiannian and Liao, Qing and Fu, Hongbing}},
issn = {{1433-7851}},
journal = {{Angewandte Chemie International Edition}},
keywords = {{General Chemistry, Catalysis}},
number = {{9}},
publisher = {{Wiley}},
title = {{{Circularly Polarized Lasing from a Microcavity Filled with Achiral Single‐Crystalline Microribbons}}},
doi = {{10.1002/anie.202213229}},
volume = {{62}},
year = {{2023}},
}
@article{36471,
abstract = {{Superconducting nanowire single-photon detectors (SNSPDs) show near unity efficiency, low dark count rate, and short recovery time. Combining these characteristics with temporal control of SNSPDs broadens their applications as in active de-latching for higher dynamic range counting or temporal filtering for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating of an SNSPD with a minimum off-to-on rise time of 2.4 ns and a total gate length of 5.0 ns. We show how the rise time depends on the inductance of the detector in combination with the control electronics. The gate window is demonstrated to be fully and freely, electrically tunable up to 500 ns at a repetition rate of 1.0 MHz, as well as ungated, free-running operation. Control electronics to generate the gating are mounted on the 2.3 K stage of a closed-cycle sorption cryostat, while the detector is operated on the cold stage at 0.8 K. We show that the efficiency and timing jitter of the detector is not altered during the on-time of the gating window. We exploit gated operation to demonstrate a method to increase in the photon counting dynamic range by a factor 11.2, as well as temporal filtering of a strong pump in an emulated pump-probe experiment.}},
author = {{Hummel, Thomas and Widhalm, Alex and Höpker, Jan Philipp and Jöns, Klaus and Chang, Jin and Fognini, Andreas and Steinhauer, Stephan and Zwiller, Val and Zrenner, Artur and Bartley, Tim}},
issn = {{1094-4087}},
journal = {{Optics Express}},
keywords = {{Atomic and Molecular Physics, and Optics}},
number = {{1}},
publisher = {{Optica Publishing Group}},
title = {{{Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry}}},
doi = {{10.1364/oe.472058}},
volume = {{31}},
year = {{2023}},
}
@article{63043,
abstract = {{Spatial modes of light have become highly attractive to increase the dimension and, thereby, security and information capacity in quantum key distribution (QKD). So far, only transverse electric field components have been considered, while longitudinal polarization components have remained neglected. Here, we present an approach to include all three spatial dimensions of electric field oscillation in QKD by implementing our tunable, on-a-chip vector beam decoder (VBD). This inversely designed device pioneers the "preparation" and "measurement" of three-dimensionally polarized mutually unbiased basis states for high-dimensional (HD) QKD and paves the way for the integration of HD QKD with spatial modes in multifunctional on-a-chip photonics platforms.}},
title = {{{Tunable vector beam decoder by inverse design for high-dimensional quantum key distribution with 3D polarized spatial modes}}},
doi = {{10.48550/ARXIV.2304.12296}},
year = {{2023}},
}
@article{46468,
author = {{Lange, Nina Amelie and Schapeler, Timon and Höpker, Jan Philipp and Protte, Maximilian and Bartley, Tim}},
issn = {{2469-9926}},
journal = {{Physical Review A}},
number = {{2}},
publisher = {{American Physical Society (APS)}},
title = {{{Degenerate photons from a cryogenic spontaneous parametric down-conversion source}}},
doi = {{10.1103/physreva.108.023701}},
volume = {{108}},
year = {{2023}},
}
@article{41035,
author = {{Sharapova, Polina R. and Kruk, Sergey S. and Solntsev, Alexander S.}},
issn = {{1863-8880}},
journal = {{Laser & Photonics Reviews}},
keywords = {{Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
publisher = {{Wiley}},
title = {{{Nonlinear Dielectric Nanoresonators and Metasurfaces: Toward Efficient Generation of Entangled Photons}}},
doi = {{10.1002/lpor.202200408}},
year = {{2023}},
}
@article{44081,
author = {{Serino, Laura and Gil López, Jano and Stefszky, Michael and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}},
issn = {{2691-3399}},
journal = {{PRX Quantum}},
keywords = {{General Physics and Astronomy, Mathematical Physics, Applied Mathematics, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, General Computer Science}},
number = {{2}},
publisher = {{American Physical Society (APS)}},
title = {{{Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States}}},
doi = {{10.1103/prxquantum.4.020306}},
volume = {{4}},
year = {{2023}},
}
@article{42648,
abstract = {{In real photonic quantum systems losses are an unavoidable factor limiting the scalability to many modes and particles, restraining their application in fields as quantum information and communication. For this reason, a considerable amount of engineering effort has been taken in order to improve the quality of particle sources and system components. At the same time, data analysis and collection methods based on post-selection have been used to mitigate the effect of particle losses. This has allowed for investigating experimentally multi-particle evolutions where the observer lacks knowledge about the system's intermediate propagation states. Nonetheless, the fundamental question how losses affect the behaviour of the surviving subset of a multi-particle system has not been investigated so far. For this reason, here we study the impact of particle losses in a quantum walk of two photons reconstructing the output probability distributions for one photon conditioned on the loss of the other in a known mode and temporal step of our evolution network. We present the underlying theoretical scheme that we have devised in order to model controlled particle losses, we describe an experimental platform capable of implementing our theory in a time multiplexing encoding. In the end we show how localized particle losses change the output distributions without altering their asymptotic spreading properties. Finally we devise a quantum civilization problem, a two walker generalisation of single particle recurrence processes.}},
author = {{Pegoraro, Federico and Held, Philip and Barkhofen, Sonja and Brecht, Benjamin and Silberhorn, Christine}},
issn = {{0031-8949}},
journal = {{Physica Scripta}},
number = {{3}},
publisher = {{IOP Publishing}},
title = {{{Dynamic conditioning of two particle discrete-time quantum walks}}},
doi = {{10.1088/1402-4896/acbcaa}},
volume = {{98}},
year = {{2023}},
}
@article{29716,
author = {{Widhalm, Alex and Golla, Christian and Weber, Nils and Mackwitz, Peter and Zrenner, Artur and Meier, Cedrik}},
issn = {{1094-4087}},
journal = {{Optics Express}},
keywords = {{Atomic and Molecular Physics, and Optics}},
number = {{4}},
publisher = {{The Optical Society}},
title = {{{Electric-field-induced second harmonic generation in silicon dioxide}}},
doi = {{10.1364/oe.443489}},
volume = {{30}},
year = {{2022}},
}
@inbook{29789,
abstract = {{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.}},
author = {{Bauer, Anna and Woitkowski, David and Reuter, Dirk and Reinhold, Peter}},
booktitle = {{Hochschullehre erforschen. }},
editor = {{Fahr, Uwe and Kenner, Alessandra and Angenent, Holger and Eßer-Lüghausen, Alexandra}},
pages = {{339--362}},
publisher = {{Springer Fachmedien}},
title = {{{Fachliche und überfachliche Herausforderungen in der Studieneingangsphase Physik}}},
doi = {{10.1007/978-3-658-34185-5_19}},
year = {{2022}},
}
@article{26747,
abstract = {{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.}},
author = {{Lu, Jinlong and Sain, Basudeb and Georgi, Philip and Protte, Maximilian and Bartley, Tim and Zentgraf, Thomas}},
issn = {{2195-1071}},
journal = {{Advanced Optical Materials}},
number = {{1}},
publisher = {{Wiley}},
title = {{{A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response}}},
doi = {{10.1002/adom.202101781}},
volume = {{10}},
year = {{2022}},
}
@article{30195,
abstract = {{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.}},
author = {{Spreyer, Florian and Mun, Jungho and Kim, Hyeohn and Kim, Ryeong Myeong and Nam, Ki Tae and Rho, Junsuk and Zentgraf, Thomas}},
issn = {{2330-4022}},
journal = {{ACS Photonics}},
keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials}},
number = {{3}},
pages = {{784–792}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles}}},
doi = {{10.1021/acsphotonics.1c00882}},
volume = {{9}},
year = {{2022}},
}
@article{30385,
abstract = {{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.}},
author = {{Jonas, B. and Heinze, D. and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, K. D. and Reuter, D. and Schumacher, S. and Zrenner, Artur}},
issn = {{2041-1723}},
journal = {{Nature Communications}},
keywords = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry}},
number = {{1}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Nonlinear down-conversion in a single quantum dot}}},
doi = {{10.1038/s41467-022-28993-3}},
volume = {{13}},
year = {{2022}},
}
@article{30384,
author = {{Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}},
issn = {{2469-9950}},
journal = {{Physical Review B}},
number = {{4}},
publisher = {{American Physical Society (APS)}},
title = {{{Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}}},
doi = {{10.1103/physrevb.105.045302}},
volume = {{105}},
year = {{2022}},
}
@article{30743,
author = {{Riedl, Thomas and Kunnathully, Vinay S. and Trapp, Alexander and Langer, Timo and Reuter, Dirk and Lindner, Jörg K. N.}},
issn = {{2196-7350}},
journal = {{Advanced Materials Interfaces}},
keywords = {{Mechanical Engineering, Mechanics of Materials}},
publisher = {{Wiley}},
title = {{{Size‐Dependent Strain Relaxation in InAs Quantum Dots on Top of GaAs(111)A Nanopillars}}},
doi = {{10.1002/admi.202102159}},
year = {{2022}},
}
@article{30880,
author = {{Kobecki, Michal and Scherbakov, Alexey V. and Kukhtaruk, Serhii M. and Yaremkevich, Dmytro D. and Henksmeier, Tobias and Trapp, Alexander and Reuter, Dirk and Gusev, Vitalyi E. and Akimov, Andrey V. and Bayer, Manfred}},
issn = {{0031-9007}},
journal = {{Physical Review Letters}},
keywords = {{General Physics and Astronomy}},
number = {{15}},
publisher = {{American Physical Society (APS)}},
title = {{{Giant Photoelasticity of Polaritons for Detection of Coherent Phonons in a Superlattice with Quantum Sensitivity}}},
doi = {{10.1103/physrevlett.128.157401}},
volume = {{128}},
year = {{2022}},
}
@article{29902,
author = {{Reineke Matsudo, Bernhard and Sain, Basudeb and Carletti, Luca and Zhang, Xue and Gao, Wenlong and Angelis, Costantino and Huang, Lingling and Zentgraf, Thomas}},
issn = {{2198-3844}},
journal = {{Advanced Science}},
keywords = {{General Physics and Astronomy, General Engineering, Biochemistry, Genetics and Molecular Biology (miscellaneous), General Materials Science, General Chemical Engineering, Medicine (miscellaneous)}},
number = {{12}},
publisher = {{Wiley}},
title = {{{Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces}}},
doi = {{10.1002/advs.202104508}},
volume = {{9}},
year = {{2022}},
}
@article{30964,
author = {{Gao, Wenlong and Sain, Basudeb and Zentgraf, Thomas}},
issn = {{2331-7019}},
journal = {{Physical Review Applied}},
keywords = {{General Physics and Astronomy}},
number = {{4}},
publisher = {{American Physical Society (APS)}},
title = {{{Spin-Orbit Interaction of Light Enabled by Negative Coupling in High-Quality-Factor Optical Metasurfaces}}},
doi = {{10.1103/physrevapplied.17.044022}},
volume = {{17}},
year = {{2022}},
}
@article{32108,
author = {{Henksmeier, T. and Schulz, J.F. and Kluth, E. and Feneberg, M. and Goldhahn, R. and Sanchez, A.M. and Voigt, M. and Grundmeier, Guido and Reuter, Dirk}},
issn = {{0022-0248}},
journal = {{Journal of Crystal Growth}},
keywords = {{Materials Chemistry, Inorganic Chemistry, Condensed Matter Physics}},
publisher = {{Elsevier BV}},
title = {{{Remote epitaxy of InxGa1-xAs (0 0 1) on graphene covered GaAs(0 0 1) substrates}}},
doi = {{10.1016/j.jcrysgro.2022.126756}},
volume = {{593}},
year = {{2022}},
}