@article{59663, abstract = {{Controlling the intensity of emitted light and charge current is the basis of transferring and processing information1. By contrast, robust information storage and magnetic random-access memories are implemented using the spin of the carrier and the associated magnetization in ferromagnets2. The missing link between the respective disciplines of photonics, electronics and spintronics is to modulate the circular polarization of the emitted light, rather than its intensity, by electrically controlled magnetization. Here we demonstrate that this missing link is established at room temperature and zero applied magnetic field in light-emitting diodes2,3,4,5,6,7, through the transfer of angular momentum between photons, electrons and ferromagnets. With spin–orbit torque8,9,10,11, a charge current generates also a spin current to electrically switch the magnetization. This switching determines the spin orientation of injected carriers into semiconductors, in which the transfer of angular momentum from the electron spin to photon controls the circular polarization of the emitted light2. The spin–photon conversion with the nonvolatile control of magnetization opens paths to seamlessly integrate information transfer, processing and storage. Our results provide substantial advances towards electrically controlled ultrafast modulation of circular polarization and spin injection with magnetization dynamics for the next-generation information and communication technology12, including space–light data transfer. The same operating principle in scaled-down structures or using two-dimensional materials will enable transformative opportunities for quantum information processing with spin-controlled single-photon sources, as well as for implementing spin-dependent time-resolved spectroscopies.}}, author = {{Dainone, Pambiang Abel and Prestes, Nicholas Figueiredo and Renucci, Pierre and Bouché, Alexandre and Morassi, Martina and Devaux, Xavier and Lindemann, Markus and George, Jean-Marie and Jaffrès, Henri and Lemaitre, Aristide and Xu, Bo and Stoffel, Mathieu and Chen, Tongxin and Lombez, Laurent and Lagarde, Delphine and Cong, Guangwei and Ma, Tianyi and Pigeat, Philippe and Vergnat, Michel and Rinnert, Hervé and Marie, Xavier and Han, Xiufeng and Mangin, Stephane and Rojas-Sánchez, Juan-Carlos and Wang, Jian-Ping and Beard, Matthew C. and Gerhardt, Nils Christopher and Žutić, Igor and Lu, Yuan}}, issn = {{0028-0836}}, journal = {{Nature}}, keywords = {{Lasers, LEDs and light sources, Spintronics}}, number = {{8005}}, pages = {{783--788}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Controlling the helicity of light by electrical magnetization switching}}}, doi = {{10.1038/s41586-024-07125-5}}, volume = {{627}}, year = {{2024}}, } @inproceedings{64298, author = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Ledentsov, N. and Ledentsov, N. N. and Shchukin, V. A. and Chorchos, Ł. and Makarov, O. Yu and Kropp, J. R. and Titkov, I. E. and Kalosha, V. P. and Zerova, V. and D’Alessandro, M. and Torrelli, V. and Tibaldi, A. and Debernardi, P.}}, booktitle = {{Vertical-Cavity Surface-Emitting Lasers XXVIII}}, title = {{{Analysis of laterally-coupled-cavity VCSELs for ultra-high-frequency photon-photon resonance modulation}}}, doi = {{10.1117/12.3001177}}, year = {{2024}}, } @inproceedings{62050, author = {{Reckmann, Eileen and Temmen, Katrin}}, location = {{Potsdam}}, title = {{{Gelingensbedingungen non-formalen Lernens an außerschulischen Lernorten – Eine qualitative Interviewstudie mit Workshop-Moderator*innen}}}, year = {{2024}}, } @inproceedings{62052, author = {{Reckmann, Eileen and Blomberg, Tobias and Temmen, Katrin}}, location = {{München}}, title = {{{„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL}}}, year = {{2024}}, } @article{64297, author = {{Lindemann, Markus (ORCiD: 0000-0002-2660-3497) and Gerhardt, Nils C. (ORCiD: 0009-0002-5538-231X) and Hofmann, Martin R. (ORCiD: 0000-0003-1265-0003) and Shchukin, V. A. and Ledentsov, N. N. and Makarov, O. Y. and Zerova, V. and D’Alessandro, M. and Tibaldi, A. and Turkiewicz, J. P.}}, title = {{{Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs}}}, year = {{2024}}, } @misc{57094, author = {{Kruse, Stephan and Scheytt, J. Christoph}}, title = {{{Elektrooptische PLL}}}, year = {{2024}}, } @techreport{57161, author = {{Werning, Alexander and Haeb-Umbach, Reinhold}}, title = {{{UPB-NT submission to DCASE24: Dataset pruning for targeted knowledge distillation}}}, year = {{2024}}, } @inproceedings{57099, author = {{Xie, Yuying and Kuhlmann, Michael and Rautenberg, Frederik and Tan, Zheng-Hua and Häb-Umbach, Reinhold}}, booktitle = {{2024 32nd European Signal Processing Conference (EUSIPCO)}}, pages = {{436–440}}, title = {{{Speaker and Style Disentanglement of Speech Based on Contrastive Predictive Coding Supported Factorized Variational Autoencoder}}}, year = {{2024}}, } @inproceedings{57107, author = {{Kress, Christian and Schwabe, Tobias and Mihaylov, Martin Miroslavov and Silberhorn, Christine and Scheytt, J. Christoph}}, location = {{Paderborn}}, title = {{{Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology}}}, year = {{2024}}, } @misc{57095, author = {{Kruse, Stephan and Scheytt, J. Christoph and Kurz, Heiko Gustav, and Schwabe, Tobias and Meinecke, Marc-Michael}}, title = {{{Mehrband-Software-Defined-Radio-System zur Umfelderfassung, sowie Verfahren und Kraftfahrzeug}}}, year = {{2024}}, } @misc{57090, author = {{Kruse, Stephan and Scheytt, J. Christoph and Meinecke, Marc-Michael and Kurz, Heiko Gustav}}, title = {{{Funk-Optisches Sensorsystem für die Umfelderfassung}}}, year = {{2024}}, } @misc{57093, author = {{Kruse, Stephan and Scheytt, J. Christoph and Meinecke, Marc-Michael and Aal, Andreas and Kurz, Heiko}}, title = {{{Radarsystem mit CMOS-Elektronikkomponenten}}}, year = {{2024}}, } @misc{57091, author = {{Scheytt, J. Christoph and Schwabe, Tobias}}, title = {{{Integriertes optisches Spektrometer}}}, year = {{2024}}, } @misc{57092, author = {{Kruse, Stephan and Scheytt, J. Christoph}}, title = {{{Optoelektronischer Oszillator}}}, year = {{2024}}, } @inproceedings{57111, author = {{Mihaylov, Martin Miroslavov and Kress, Christian and Scheytt, J. Christoph}}, location = {{Paderborn}}, title = {{{Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications}}}, year = {{2024}}, } @misc{57096, author = {{Kruse, Stephan and Scheytt, J. Christoph and Schwabe, Tobias and Heiko Gustav, Kurz and Marc-Michael, Meinecke}}, title = {{{Mehrband-Sensorsystem zur Umfelderfassung, sowie Verfahren und Kraftfahrzeug}}}, year = {{2024}}, } @misc{57089, author = {{Kruse, Stephan and Brecht, Benjamin and Silberhorn, Christine and Serino, Laura Maria}}, title = {{{Quantenoptisch-unterstütztes Sende-/Empfangssystem}}}, year = {{2024}}, } @inproceedings{54356, abstract = {{Although there are numerous design and control methodologies for the LLC resonant converter, they often do not consider decentralized control strategies to operate them as isolated DC-DC converters within a cascaded H-bridge. The total output power of all LLC converters must be constant to supply a load such as a wa- ter electrolyzer. However, each individual LLC converter can vary its output power as long as the total output power remains constant. This opens new possibilities in increasing the system efficiency and robustness. Usually, the DC-link voltage of each module capacitor shows a 2nd harmonic voltage ripple. However, the total stored energy in all DC-link capacitors is constant within a grid period for a balanced three-phase system. By controlling each LLC converter’s output power locally to be proportional to the energy stored in its DC-link capacitor, modules with a lower instantaneous DC-link voltage transfer less power to the load than modules with a higher DC-link voltage. As a result, a higher efficiency, voltage gain and lower peak resonant capacitor voltage can be achieved with the same components. The 22.2kW experimental prototype of the LLC converter reaches an efficiency of over 97% at resonance which is similar to the precalculated value.}}, author = {{Unruh, Roland and Böcker, Joachim and Schafmeister, Frank}}, booktitle = {{ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe}}, isbn = {{979-8-3503-6444-6}}, keywords = {{Cascaded H-Bridge, Converter Losses, Decentralized Control, Full-Bridge Converter, LLC Resonant Converter}}, location = {{Darmstadt, Germany}}, publisher = {{IEEE}}, title = {{{Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter}}}, doi = {{https://doi.org/10.1109/ECCEEurope62508.2024.10751954}}, year = {{2024}}, } @inproceedings{57528, abstract = {{Based on the surface equivalence principle an equivalent near-field source can be determined by measurements with a near-field scanner. One application is to use the source to simulate the interferences of the device-under-test with other objects in its close environment. Due to a limited signal-to-noise ratio in practical applications, noise adds to the near-field source. Hence, noise effects affect the quality of the simulation results and cause uncertainties. The influence of the noise effects is investigated by a simulative approach with artificially added noise. Two test devices with different a geometric dimension, operating frequency and excited power are evaluated for different characteristics and signal-to-noise ratios to assess the impact of the simulation results. Finally, in a combined simulation an equivalent near-field source will disturb an IoT-device and the voltages at two resistors on the device are examined.}}, author = {{Schröder, Dominik and Kiefner, Ulrich and Hedayat, Christian and Förstner, Jens}}, booktitle = {{2024 International Symposium on Electromagnetic Compatibility – EMC Europe}}, keywords = {{tet_topic_hf, tet_enas}}, publisher = {{IEEE}}, title = {{{Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources}}}, doi = {{10.1109/emceurope59828.2024.10722220}}, year = {{2024}}, } @inproceedings{54635, author = {{Maletz, Lucia and Temmen, Katrin and Bentrup, Leon Alexander and Frank, Carolin}}, booktitle = {{Dekarbonisierung, Digitalisierung, Demographie: Gestaltungsanspruch Für {Gewerblich-Technische} Facharbeit und }}, editor = {{Grimm, Axel and Herkner, Volkmar and Karges, Torben and Schlausch, Reiner}}, isbn = {{978-3-631-90685-9}}, pages = {{477--491}}, publisher = {{Peter Lang GmbH, Internationaler Verlag der Wissenschaften}}, title = {{{Didaktische Nutzung des digitalen Zwillings in einem E-Learning-Lernbaustein zum Thema "Smart Factory" für die Lehramtsmasterstudiengänge der gewerblich-technischen Fachrichtung}}}, year = {{2024}}, }