[{"department":[{"_id":"101"}],"publication":"2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE)","author":[{"last_name":"Hanke","first_name":"Soren","full_name":"Hanke, Soren"},{"last_name":"Peitz","id":"47427","first_name":"Sebastian","full_name":"Peitz, Sebastian","orcid":"https://orcid.org/0000-0002-3389-793X"},{"first_name":"Oliver","full_name":"Wallscheid, Oliver","last_name":"Wallscheid"},{"full_name":"Böcker, Joachim","first_name":"Joachim","last_name":"Böcker"},{"last_name":"Dellnitz","full_name":"Dellnitz, Michael","first_name":"Michael"}],"publication_identifier":{"isbn":["9781538694145"]},"publication_status":"published","date_created":"2019-07-10T08:15:23Z","status":"public","abstract":[{"text":"In comparison to classical control approaches in the field of electrical drives like the field-oriented control (FOC), model predictive control (MPC) approaches are able to provide a higher control performance. This refers to shorter settling times, lower overshoots, and a better decoupling of control variables in case of multi-variable controls. However, this can only be achieved if the used prediction model covers the actual behavior of the plant sufficiently well. In case of model deviations, the performance utilizing MPC remains below its potential. This results in effects like increased current ripple or steady state setpoint deviations. In order to achieve a high control performance, it is therefore necessary to adapt the model to the real plant behavior. When using an online system identification, a less accurate model is sufficient for commissioning of the drive system. In this paper, the combination of a finite-control-set MPC (FCS-MPC) with a system identification is proposed. The method does not require high-frequency signal injection, but uses the measured values already required for the FCS-MPC. An evaluation of the least squares-based identification on a laboratory test bench showed that the model accuracy and thus the control performance could be improved by an online update of the prediction models.","lang":"eng"}],"title":"Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification","user_id":"47427","citation":{"bibtex":"@inproceedings{Hanke_Peitz_Wallscheid_Böcker_Dellnitz_2019, title={Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification}, DOI={10.1109/precede.2019.8753313}, booktitle={2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE)}, author={Hanke, Soren and Peitz, Sebastian and Wallscheid, Oliver and Böcker, Joachim and Dellnitz, Michael}, year={2019} }","mla":"Hanke, Soren, et al. “Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification.” 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019, doi:10.1109/precede.2019.8753313.","apa":"Hanke, S., Peitz, S., Wallscheid, O., Böcker, J., & Dellnitz, M. (2019). Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification. In 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE). https://doi.org/10.1109/precede.2019.8753313","ama":"Hanke S, Peitz S, Wallscheid O, Böcker J, Dellnitz M. Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification. In: 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE). ; 2019. doi:10.1109/precede.2019.8753313","chicago":"Hanke, Soren, Sebastian Peitz, Oliver Wallscheid, Joachim Böcker, and Michael Dellnitz. “Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification.” In 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019. https://doi.org/10.1109/precede.2019.8753313.","ieee":"S. Hanke, S. Peitz, O. Wallscheid, J. Böcker, and M. Dellnitz, “Finite-Control-Set Model Predictive Control for a Permanent Magnet Synchronous Motor Application with Online Least Squares System Identification,” in 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019.","short":"S. Hanke, S. Peitz, O. Wallscheid, J. Böcker, M. Dellnitz, in: 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019."},"type":"conference","year":"2019","language":[{"iso":"eng"}],"_id":"10597","date_updated":"2022-01-06T06:50:46Z","doi":"10.1109/precede.2019.8753313"},{"title":"Assessing the long-term fragmentation of information systems research with a longitudinal multi-network analysis","user_id":"72744","volume":28,"publication_status":"published","publication_identifier":{"issn":["0960-085X","1476-9344"]},"status":"public","date_created":"2019-07-11T08:25:41Z","author":[{"full_name":"Khan, Gohar Feroz","first_name":"Gohar Feroz","last_name":"Khan"},{"full_name":"Trier, Matthias","first_name":"Matthias","id":"72744","last_name":"Trier"}],"department":[{"_id":"198"}],"publication":"European Journal of Information Systems","doi":"10.1080/0960085x.2018.1547853","issue":"4","date_updated":"2022-01-06T06:50:50Z","_id":"10792","intvolume":" 28","type":"journal_article","year":"2019","citation":{"short":"G.F. Khan, M. Trier, European Journal of Information Systems 28 (2019) 370–393.","ieee":"G. F. Khan and M. Trier, “Assessing the long-term fragmentation of information systems research with a longitudinal multi-network analysis,” European Journal of Information Systems, vol. 28, no. 4, pp. 370–393, 2019.","chicago":"Khan, Gohar Feroz, and Matthias Trier. “Assessing the Long-Term Fragmentation of Information Systems Research with a Longitudinal Multi-Network Analysis.” European Journal of Information Systems 28, no. 4 (2019): 370–93. https://doi.org/10.1080/0960085x.2018.1547853.","apa":"Khan, G. F., & Trier, M. (2019). Assessing the long-term fragmentation of information systems research with a longitudinal multi-network analysis. European Journal of Information Systems, 28(4), 370–393. https://doi.org/10.1080/0960085x.2018.1547853","ama":"Khan GF, Trier M. Assessing the long-term fragmentation of information systems research with a longitudinal multi-network analysis. European Journal of Information Systems. 2019;28(4):370-393. doi:10.1080/0960085x.2018.1547853","mla":"Khan, Gohar Feroz, and Matthias Trier. “Assessing the Long-Term Fragmentation of Information Systems Research with a Longitudinal Multi-Network Analysis.” European Journal of Information Systems, vol. 28, no. 4, 2019, pp. 370–93, doi:10.1080/0960085x.2018.1547853.","bibtex":"@article{Khan_Trier_2019, title={Assessing the long-term fragmentation of information systems research with a longitudinal multi-network analysis}, volume={28}, DOI={10.1080/0960085x.2018.1547853}, number={4}, journal={European Journal of Information Systems}, author={Khan, Gohar Feroz and Trier, Matthias}, year={2019}, pages={370–393} }"},"page":"370-393","language":[{"iso":"eng"}]},{"user_id":"82920","title":"Argument Search: Assessing Argument Relevance","date_created":"2019-07-11T13:09:41Z","status":"public","department":[{"_id":"600"},{"_id":"568"}],"publication":"42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019)","publisher":"ACM","author":[{"full_name":"Potthast, Martin","first_name":"Martin","last_name":"Potthast"},{"last_name":"Gienapp","first_name":"Lukas","full_name":"Gienapp, Lukas"},{"first_name":"Florian","full_name":"Euchner, Florian","last_name":"Euchner"},{"last_name":"Heilenkötter","full_name":"Heilenkötter, Nick","first_name":"Nick"},{"full_name":"Weidmann, Nico","first_name":"Nico","last_name":"Weidmann"},{"first_name":"Henning","full_name":"Wachsmuth, Henning","last_name":"Wachsmuth","id":"3900"},{"last_name":"Stein","first_name":"Benno","full_name":"Stein, Benno"},{"full_name":"Hagen, Matthias","first_name":"Matthias","last_name":"Hagen"}],"doi":"10.1145/3331184.3331327","_id":"11709","date_updated":"2022-01-06T06:51:06Z","language":[{"iso":"eng"}],"page":"1117 - 1120","citation":{"apa":"Potthast, M., Gienapp, L., Euchner, F., Heilenkötter, N., Weidmann, N., Wachsmuth, H., … Hagen, M. (2019). Argument Search: Assessing Argument Relevance. In 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019) (pp. 1117–1120). ACM. https://doi.org/10.1145/3331184.3331327","ama":"Potthast M, Gienapp L, Euchner F, et al. Argument Search: Assessing Argument Relevance. In: 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019). ACM; 2019:1117-1120. doi:10.1145/3331184.3331327","chicago":"Potthast, Martin, Lukas Gienapp, Florian Euchner, Nick Heilenkötter, Nico Weidmann, Henning Wachsmuth, Benno Stein, and Matthias Hagen. “Argument Search: Assessing Argument Relevance.” In 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019), 1117–20. ACM, 2019. https://doi.org/10.1145/3331184.3331327.","bibtex":"@inproceedings{Potthast_Gienapp_Euchner_Heilenkötter_Weidmann_Wachsmuth_Stein_Hagen_2019, title={Argument Search: Assessing Argument Relevance}, DOI={10.1145/3331184.3331327}, booktitle={42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019)}, publisher={ACM}, author={Potthast, Martin and Gienapp, Lukas and Euchner, Florian and Heilenkötter, Nick and Weidmann, Nico and Wachsmuth, Henning and Stein, Benno and Hagen, Matthias}, year={2019}, pages={1117–1120} }","mla":"Potthast, Martin, et al. “Argument Search: Assessing Argument Relevance.” 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019), ACM, 2019, pp. 1117–20, doi:10.1145/3331184.3331327.","short":"M. Potthast, L. Gienapp, F. Euchner, N. Heilenkötter, N. Weidmann, H. Wachsmuth, B. Stein, M. Hagen, in: 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019), ACM, 2019, pp. 1117–1120.","ieee":"M. Potthast et al., “Argument Search: Assessing Argument Relevance,” in 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019), 2019, pp. 1117–1120."},"type":"conference","year":"2019","main_file_link":[{"url":"https://dl.acm.org/doi/pdf/10.1145/3331184.3331327"}]},{"page":"603 - 606","year":"2019","citation":{"bibtex":"@article{Wachsmuth_2019, title={Book Review: Argumentation Mining}, volume={45}, number={3}, journal={Computational Linguistics}, publisher={ACL}, author={Wachsmuth, Henning}, year={2019}, pages={603–606} }","mla":"Wachsmuth, Henning. “Book Review: Argumentation Mining.” Computational Linguistics, vol. 45, no. 3, ACL, 2019, pp. 603–06.","ama":"Wachsmuth H. Book Review: Argumentation Mining. Computational Linguistics. 2019;45(3):603-606.","apa":"Wachsmuth, H. (2019). Book Review: Argumentation Mining. Computational Linguistics. ACL.","chicago":"Wachsmuth, Henning. “Book Review: Argumentation Mining.” Computational Linguistics. ACL, 2019.","ieee":"H. Wachsmuth, “Book Review: Argumentation Mining,” Computational Linguistics, vol. 45, no. 3. ACL, pp. 603–606, 2019.","short":"H. Wachsmuth, Computational Linguistics 45 (2019) 603–606."},"type":"review","language":[{"iso":"eng"}],"intvolume":" 45","_id":"11713","date_updated":"2022-01-06T06:51:07Z","issue":"3","publication":"Computational Linguistics","department":[{"_id":"600"}],"publisher":"ACL","author":[{"full_name":"Wachsmuth, Henning","first_name":"Henning","id":"3900","last_name":"Wachsmuth"}],"volume":45,"date_created":"2019-07-11T13:29:48Z","status":"public","title":"Book Review: Argumentation Mining","user_id":"3900"},{"date_updated":"2022-01-06T06:51:07Z","_id":"11714","main_file_link":[{"url":"https://webis.de/downloads/publications/papers/stein_2019p.pdf"}],"language":[{"iso":"eng"}],"page":"48-59","type":"conference","citation":{"short":"Y. Ajjour, H. Wachsmuth, J. Kiesel, M. Potthast, M. Hagen, B. Stein, in: Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence, 2019, pp. 48–59.","ieee":"Y. Ajjour, H. Wachsmuth, J. Kiesel, M. Potthast, M. Hagen, and B. Stein, “Data Acquisition for Argument Search: The args.me Corpus,” in Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence, 2019, pp. 48–59.","apa":"Ajjour, Y., Wachsmuth, H., Kiesel, J., Potthast, M., Hagen, M., & Stein, B. (2019). Data Acquisition for Argument Search: The args.me Corpus. In Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence (pp. 48–59).","ama":"Ajjour Y, Wachsmuth H, Kiesel J, Potthast M, Hagen M, Stein B. Data Acquisition for Argument Search: The args.me Corpus. In: Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence. ; 2019:48-59.","chicago":"Ajjour, Yamen, Henning Wachsmuth, Johannes Kiesel, Martin Potthast, Matthias Hagen, and Benno Stein. “Data Acquisition for Argument Search: The Args.Me Corpus.” In Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence, 48–59, 2019.","mla":"Ajjour, Yamen, et al. “Data Acquisition for Argument Search: The Args.Me Corpus.” Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence, 2019, pp. 48–59.","bibtex":"@inproceedings{Ajjour_Wachsmuth_ Kiesel_Potthast_Hagen_Stein_2019, title={Data Acquisition for Argument Search: The args.me Corpus}, booktitle={Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence}, author={Ajjour, Yamen and Wachsmuth, Henning and Kiesel, Johannes and Potthast, Martin and Hagen, Matthias and Stein, Benno}, year={2019}, pages={48–59} }"},"year":"2019","user_id":"82920","title":"Data Acquisition for Argument Search: The args.me Corpus","department":[{"_id":"600"},{"_id":"568"}],"publication":"Proceedings of the 42nd Edition of the German Conference on Artificial Intelligence","author":[{"last_name":"Ajjour","full_name":"Ajjour, Yamen","first_name":"Yamen"},{"last_name":"Wachsmuth","id":"3900","first_name":"Henning","full_name":"Wachsmuth, Henning"},{"full_name":" Kiesel, Johannes","first_name":"Johannes","last_name":" Kiesel"},{"last_name":"Potthast","full_name":"Potthast, Martin","first_name":"Martin"},{"first_name":"Matthias","full_name":"Hagen, Matthias","last_name":"Hagen"},{"last_name":"Stein","full_name":"Stein, Benno","first_name":"Benno"}],"date_created":"2019-07-11T13:43:15Z","status":"public"},{"keyword":["High density electromyography","FPGA acceleration","Medical signal processing","Pattern recognition","Prosthetics"],"publication":"Journal of Parallel and Distributed Computing","publisher":"Elsevier","author":[{"last_name":"Boschmann","full_name":"Boschmann, Alexander","first_name":"Alexander"},{"last_name":"Agne","full_name":"Agne, Andreas","first_name":"Andreas"},{"first_name":"Georg","full_name":"Thombansen, Georg","last_name":"Thombansen"},{"full_name":"Witschen, Linus Matthias","first_name":"Linus Matthias","id":"49051","last_name":"Witschen"},{"last_name":"Kraus","full_name":"Kraus, Florian","first_name":"Florian"},{"last_name":"Platzner","id":"398","first_name":"Marco","full_name":"Platzner, Marco"}],"date_created":"2019-07-12T13:13:55Z","status":"public","volume":123,"abstract":[{"lang":"eng","text":"Advances in electromyographic (EMG) sensor technology and machine learning algorithms have led to an increased research effort into high density EMG-based pattern recognition methods for prosthesis control. With the goal set on an autonomous multi-movement prosthesis capable of performing training and classification of an amputee’s EMG signals, the focus of this paper lies in the acceleration of the embedded signal processing chain. We present two Xilinx Zynq-based architectures for accelerating two inherently different high density EMG-based control algorithms. The first hardware accelerated design achieves speed-ups of up to 4.8 over the software-only solution, allowing for a processing delay lower than the sample period of 1 ms. The second system achieved a speed-up of 5.5 over the software-only version and operates at a still satisfactory low processing delay of up to 15 ms while providing a higher reliability and robustness against electrode shift and noisy channels."}],"user_id":"398","page":"77-89","type":"journal_article","year":"2019","citation":{"mla":"Boschmann, Alexander, et al. “Zynq-Based Acceleration of Robust High Density Myoelectric Signal Processing.” Journal of Parallel and Distributed Computing, vol. 123, Elsevier, 2019, pp. 77–89, doi:10.1016/j.jpdc.2018.07.004.","bibtex":"@article{Boschmann_Agne_Thombansen_Witschen_Kraus_Platzner_2019, title={Zynq-based acceleration of robust high density myoelectric signal processing}, volume={123}, DOI={10.1016/j.jpdc.2018.07.004}, journal={Journal of Parallel and Distributed Computing}, publisher={Elsevier}, author={Boschmann, Alexander and Agne, Andreas and Thombansen, Georg and Witschen, Linus Matthias and Kraus, Florian and Platzner, Marco}, year={2019}, pages={77–89} }","ama":"Boschmann A, Agne A, Thombansen G, Witschen LM, Kraus F, Platzner M. Zynq-based acceleration of robust high density myoelectric signal processing. Journal of Parallel and Distributed Computing. 2019;123:77-89. doi:10.1016/j.jpdc.2018.07.004","apa":"Boschmann, A., Agne, A., Thombansen, G., Witschen, L. M., Kraus, F., & Platzner, M. (2019). Zynq-based acceleration of robust high density myoelectric signal processing. Journal of Parallel and Distributed Computing, 123, 77–89. https://doi.org/10.1016/j.jpdc.2018.07.004","chicago":"Boschmann, Alexander, Andreas Agne, Georg Thombansen, Linus Matthias Witschen, Florian Kraus, and Marco Platzner. “Zynq-Based Acceleration of Robust High Density Myoelectric Signal Processing.” Journal of Parallel and Distributed Computing 123 (2019): 77–89. https://doi.org/10.1016/j.jpdc.2018.07.004.","ieee":"A. Boschmann, A. Agne, G. Thombansen, L. M. Witschen, F. Kraus, and M. Platzner, “Zynq-based acceleration of robust high density myoelectric signal processing,” Journal of Parallel and Distributed Computing, vol. 123, pp. 77–89, 2019.","short":"A. Boschmann, A. Agne, G. Thombansen, L.M. Witschen, F. Kraus, M. Platzner, Journal of Parallel and Distributed Computing 123 (2019) 77–89."},"intvolume":" 123","_id":"11950","department":[{"_id":"78"}],"publication_identifier":{"issn":["0743-7315"]},"publication_status":"published","title":"Zynq-based acceleration of robust high density myoelectric signal processing","language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:51:13Z","doi":"10.1016/j.jpdc.2018.07.004"},{"doi":"10.1007/978-3-030-23535-2_27","conference":{"location":"Orlando, FL, USA","name":"21st International Conference on Human-Computer Interaction","start_date":"2019-07-26","end_date":"2019-07-31"},"_id":"11952","date_updated":"2022-01-06T06:51:13Z","year":"2019","type":"book_chapter","citation":{"short":"B. Senft, F. Rittmeier, H.G. Fischer, S. Oberthür, in: Design, User Experience, and Usability. Practice and Case Studies, Cham, 2019.","ieee":"B. Senft, F. Rittmeier, H. G. Fischer, and S. Oberthür, “A Value-Centered Approach for Unique and Novel Software Applications,” in Design, User Experience, and Usability. Practice and Case Studies, Cham, 2019.","chicago":"Senft, Björn, Florian Rittmeier, Holger Gerhard Fischer, and Simon Oberthür. “A Value-Centered Approach for Unique and Novel Software Applications.” In Design, User Experience, and Usability. Practice and Case Studies. Cham, 2019. https://doi.org/10.1007/978-3-030-23535-2_27.","apa":"Senft, B., Rittmeier, F., Fischer, H. G., & Oberthür, S. (2019). A Value-Centered Approach for Unique and Novel Software Applications. In Design, User Experience, and Usability. Practice and Case Studies. Cham. https://doi.org/10.1007/978-3-030-23535-2_27","ama":"Senft B, Rittmeier F, Fischer HG, Oberthür S. A Value-Centered Approach for Unique and Novel Software Applications. In: Design, User Experience, and Usability. Practice and Case Studies. Cham; 2019. doi:10.1007/978-3-030-23535-2_27","mla":"Senft, Björn, et al. “A Value-Centered Approach for Unique and Novel Software Applications.” Design, User Experience, and Usability. Practice and Case Studies, 2019, doi:10.1007/978-3-030-23535-2_27.","bibtex":"@inbook{Senft_Rittmeier_Fischer_Oberthür_2019, place={Cham}, title={A Value-Centered Approach for Unique and Novel Software Applications}, DOI={10.1007/978-3-030-23535-2_27}, booktitle={Design, User Experience, and Usability. Practice and Case Studies}, author={Senft, Björn and Rittmeier, Florian and Fischer, Holger Gerhard and Oberthür, Simon}, year={2019} }"},"language":[{"iso":"eng"}],"title":"A Value-Centered Approach for Unique and Novel Software Applications","user_id":"9109","place":"Cham","publication_status":"published","publication_identifier":{"issn":["0302-9743","1611-3349"],"isbn":["9783030235345","9783030235352"]},"date_created":"2019-07-14T07:57:53Z","status":"public","department":[{"_id":"66"}],"publication":"Design, User Experience, and Usability. Practice and Case Studies","author":[{"id":"9109","last_name":"Senft","full_name":"Senft, Björn","first_name":"Björn"},{"first_name":"Florian","full_name":"Rittmeier, Florian","last_name":"Rittmeier","id":"5281"},{"full_name":"Fischer, Holger Gerhard","first_name":"Holger Gerhard","id":"30457","last_name":"Fischer"},{"full_name":"Oberthür, Simon","first_name":"Simon","id":"383","last_name":"Oberthür"}]},{"project":[{"name":"TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - Subproject A8","_id":"65"},{"_id":"53","name":"TRR 142"}],"publication_status":"published","publication_identifier":{"issn":["1530-6984","1530-6992"]},"department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"429"}],"title":"Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces","external_id":{"pmid":["31050899"]},"language":[{"iso":"eng"}],"doi":"10.1021/acs.nanolett.9b01298","date_updated":"2022-01-06T06:51:13Z","date_created":"2019-07-15T07:55:26Z","status":"public","volume":19,"publication":"Nano Letters","quality_controlled":"1","author":[{"full_name":"Frese, Daniel","first_name":"Daniel","last_name":"Frese"},{"last_name":"Wei","first_name":"Qunshuo","full_name":"Wei, Qunshuo"},{"last_name":"Wang","full_name":"Wang, Yongtian","first_name":"Yongtian"},{"last_name":"Huang","full_name":"Huang, Lingling","first_name":"Lingling"},{"id":"30525","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","full_name":"Zentgraf, Thomas","first_name":"Thomas"}],"user_id":"30525","abstract":[{"text":"As flexible optical devices that can manipulate the phase and amplitude of light, metasurfaces would clearly benefit from directional optical properties. However, single layer metasurface systems consisting of two-dimensional nanoparticle arrays exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly symmetric transmission features. Here, we present a metasurface design principle for nonreciprocal polarization encryption of holographic images. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and generates a bidirectional functionality with full phase and amplitude control of the transmitted light. The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction. Hence, layered metasurface systems can feature asymmetric transmission with full phase and amplitude control and therefore expand the design freedom in nanoscale optical devices toward asymmetric information processing and security features for anticounterfeiting applications.","lang":"eng"}],"article_type":"original","page":"3976-3980","year":"2019","type":"journal_article","citation":{"mla":"Frese, Daniel, et al. “Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces.” Nano Letters, vol. 19, no. 6, 2019, pp. 3976–80, doi:10.1021/acs.nanolett.9b01298.","bibtex":"@article{Frese_Wei_Wang_Huang_Zentgraf_2019, title={Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces}, volume={19}, DOI={10.1021/acs.nanolett.9b01298}, number={6}, journal={Nano Letters}, author={Frese, Daniel and Wei, Qunshuo and Wang, Yongtian and Huang, Lingling and Zentgraf, Thomas}, year={2019}, pages={3976–3980} }","ama":"Frese D, Wei Q, Wang Y, Huang L, Zentgraf T. Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces. Nano Letters. 2019;19(6):3976-3980. doi:10.1021/acs.nanolett.9b01298","apa":"Frese, D., Wei, Q., Wang, Y., Huang, L., & Zentgraf, T. (2019). Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces. Nano Letters, 19(6), 3976–3980. https://doi.org/10.1021/acs.nanolett.9b01298","chicago":"Frese, Daniel, Qunshuo Wei, Yongtian Wang, Lingling Huang, and Thomas Zentgraf. “Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces.” Nano Letters 19, no. 6 (2019): 3976–80. https://doi.org/10.1021/acs.nanolett.9b01298.","ieee":"D. Frese, Q. Wei, Y. Wang, L. Huang, and T. Zentgraf, “Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces,” Nano Letters, vol. 19, no. 6, pp. 3976–3980, 2019, doi: 10.1021/acs.nanolett.9b01298.","short":"D. Frese, Q. Wei, Y. Wang, L. Huang, T. Zentgraf, Nano Letters 19 (2019) 3976–3980."},"funded_apc":"1","pmid":"1","issue":"6","_id":"11953","intvolume":" 19"},{"doi":"10.1364/oe.27.021153","date_updated":"2022-01-06T06:51:14Z","language":[{"iso":"eng"}],"title":"Reconfigurable metasurface hologram by utilizing addressable dynamic pixels","publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"}],"issue":"15","intvolume":" 27","_id":"11955","type":"journal_article","year":"2019","citation":{"short":"T. Li, Q. Wei, B. Reineke, F. Walter, Y. Wang, T. Zentgraf, L. Huang, Optics Express 27 (2019) 21153–21162.","ieee":"T. Li et al., “Reconfigurable metasurface hologram by utilizing addressable dynamic pixels,” Optics Express, vol. 27, no. 15, pp. 21153–21162, 2019.","ama":"Li T, Wei Q, Reineke B, et al. Reconfigurable metasurface hologram by utilizing addressable dynamic pixels. Optics Express. 2019;27(15):21153-21162. doi:10.1364/oe.27.021153","apa":"Li, T., Wei, Q., Reineke, B., Walter, F., Wang, Y., Zentgraf, T., & Huang, L. (2019). Reconfigurable metasurface hologram by utilizing addressable dynamic pixels. Optics Express, 27(15), 21153–21162. https://doi.org/10.1364/oe.27.021153","chicago":"Li, Tianyou, Qunshuo Wei, Bernhard Reineke, Felicitas Walter, Yongtian Wang, Thomas Zentgraf, and Lingling Huang. “Reconfigurable Metasurface Hologram by Utilizing Addressable Dynamic Pixels.” Optics Express 27, no. 15 (2019): 21153–62. https://doi.org/10.1364/oe.27.021153.","bibtex":"@article{Li_Wei_Reineke_Walter_Wang_Zentgraf_Huang_2019, title={Reconfigurable metasurface hologram by utilizing addressable dynamic pixels}, volume={27}, DOI={10.1364/oe.27.021153}, number={15}, journal={Optics Express}, author={Li, Tianyou and Wei, Qunshuo and Reineke, Bernhard and Walter, Felicitas and Wang, Yongtian and Zentgraf, Thomas and Huang, Lingling}, year={2019}, pages={21153–21162} }","mla":"Li, Tianyou, et al. “Reconfigurable Metasurface Hologram by Utilizing Addressable Dynamic Pixels.” Optics Express, vol. 27, no. 15, 2019, pp. 21153–62, doi:10.1364/oe.27.021153."},"page":"21153-21162","user_id":"30525","ddc":["530"],"article_type":"original","status":"public","has_accepted_license":"1","date_created":"2019-07-16T06:01:18Z","volume":27,"file":[{"access_level":"closed","date_created":"2019-07-16T06:11:30Z","file_name":"OptExpress_Li_2019.pdf","relation":"main_file","success":1,"content_type":"application/pdf","date_updated":"2019-07-16T06:11:30Z","file_id":"11957","creator":"zentgraf","file_size":1585168}],"author":[{"full_name":"Li, Tianyou","first_name":"Tianyou","last_name":"Li"},{"last_name":"Wei","full_name":"Wei, Qunshuo","first_name":"Qunshuo"},{"first_name":"Bernhard","full_name":"Reineke, Bernhard","last_name":"Reineke"},{"last_name":"Walter","first_name":"Felicitas","full_name":"Walter, Felicitas"},{"full_name":"Wang, Yongtian","first_name":"Yongtian","last_name":"Wang"},{"last_name":"Zentgraf","id":"30525","first_name":"Thomas","orcid":"0000-0002-8662-1101","full_name":"Zentgraf, Thomas"},{"full_name":"Huang, Lingling","first_name":"Lingling","last_name":"Huang"}],"quality_controlled":"1","publication":"Optics Express","file_date_updated":"2019-07-16T06:11:30Z"},{"oa":"1","date_updated":"2022-01-06T06:51:14Z","language":[{"iso":"eng"}],"title":"Unsupervised training of neural mask-based beamforming","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"54"}],"_id":"11965","citation":{"mla":"Drude, Lukas, et al. “Unsupervised Training of Neural Mask-Based Beamforming.” INTERSPEECH 2019, Graz, Austria, 2019.","bibtex":"@inproceedings{Drude_Heymann_Haeb-Umbach_2019, title={Unsupervised training of neural mask-based beamforming}, booktitle={INTERSPEECH 2019, Graz, Austria}, author={Drude, Lukas and Heymann, Jahn and Haeb-Umbach, Reinhold}, year={2019} }","chicago":"Drude, Lukas, Jahn Heymann, and Reinhold Haeb-Umbach. “Unsupervised Training of Neural Mask-Based Beamforming.” In INTERSPEECH 2019, Graz, Austria, 2019.","ama":"Drude L, Heymann J, Haeb-Umbach R. Unsupervised training of neural mask-based beamforming. In: INTERSPEECH 2019, Graz, Austria. ; 2019.","apa":"Drude, L., Heymann, J., & Haeb-Umbach, R. (2019). Unsupervised training of neural mask-based beamforming. In INTERSPEECH 2019, Graz, Austria.","ieee":"L. Drude, J. Heymann, and R. Haeb-Umbach, “Unsupervised training of neural mask-based beamforming,” in INTERSPEECH 2019, Graz, Austria, 2019.","short":"L. Drude, J. Heymann, R. Haeb-Umbach, in: INTERSPEECH 2019, Graz, Austria, 2019."},"year":"2019","type":"conference","ddc":["000"],"user_id":"59789","abstract":[{"text":"We present an unsupervised training approach for a neural network-based mask estimator in an acoustic beamforming application. The network is trained to maximize a likelihood criterion derived from a spatial mixture model of the observations. It is trained from scratch without requiring any parallel data consisting of degraded input and clean training targets. Thus, training can be carried out on real recordings of noisy speech rather than simulated ones. In contrast to previous work on unsupervised training of neural mask estimators, our approach avoids the need for a possibly pre-trained teacher model entirely. We demonstrate the effectiveness of our approach by speech recognition experiments on two different datasets: one mainly deteriorated by noise (CHiME 4) and one by reverberation (REVERB). The results show that the performance of the proposed system is on par with a supervised system using oracle target masks for training and with a system trained using a model-based teacher.","lang":"eng"}],"date_created":"2019-07-18T09:11:39Z","has_accepted_license":"1","status":"public","publication":"INTERSPEECH 2019, Graz, Austria","file_date_updated":"2019-08-13T06:41:35Z","author":[{"id":"11213","last_name":"Drude","full_name":"Drude, Lukas","first_name":"Lukas"},{"full_name":"Heymann, Jahn","first_name":"Jahn","id":"9168","last_name":"Heymann"},{"full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","id":"242","last_name":"Haeb-Umbach"}],"file":[{"access_level":"open_access","date_created":"2019-08-13T06:36:44Z","file_name":"INTERSPEECH_2019_Drude_Paper.pdf","content_type":"application/pdf","date_updated":"2019-08-13T06:41:35Z","relation":"main_file","file_size":223413,"file_id":"12914","creator":"huesera"}]}]