--- _id: '13443' abstract: - lang: eng text: "This work considers the problem of control and resource allocation in networked\r\nsystems. To this end, we present DIRA a Deep reinforcement learning based Iterative Resource\r\nAllocation algorithm, which is scalable and control-aware. Our algorithm is tailored towards\r\nlarge-scale problems where control and scheduling need to act jointly to optimize performance.\r\nDIRA can be used to schedule general time-domain optimization based controllers. In the present\r\nwork, we focus on control designs based on suitably adapted linear quadratic regulators. We\r\napply our algorithm to networked systems with correlated fading communication channels. Our\r\nsimulations show that DIRA scales well to large scheduling problems." author: - first_name: Adrian full_name: Redder, Adrian id: '52265' last_name: Redder orcid: https://orcid.org/0000-0001-7391-4688 - first_name: Arunselvan full_name: Ramaswamy, Arunselvan id: '66937' last_name: Ramaswamy orcid: https://orcid.org/ 0000-0001-7547-8111 - first_name: Daniel full_name: Quevedo, Daniel last_name: Quevedo citation: ama: 'Redder A, Ramaswamy A, Quevedo D. Deep reinforcement learning for scheduling in large-scale networked control systems. In: Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems. ; 2019.' apa: Redder, A., Ramaswamy, A., & Quevedo, D. (2019). Deep reinforcement learning for scheduling in large-scale networked control systems. In Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems. Chicago, USA. bibtex: '@inproceedings{Redder_Ramaswamy_Quevedo_2019, title={Deep reinforcement learning for scheduling in large-scale networked control systems}, booktitle={Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems}, author={Redder, Adrian and Ramaswamy, Arunselvan and Quevedo, Daniel}, year={2019} }' chicago: Redder, Adrian, Arunselvan Ramaswamy, and Daniel Quevedo. “Deep Reinforcement Learning for Scheduling in Large-Scale Networked Control Systems.” In Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems, 2019. ieee: A. Redder, A. Ramaswamy, and D. Quevedo, “Deep reinforcement learning for scheduling in large-scale networked control systems,” in Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems, Chicago, USA, 2019. mla: Redder, Adrian, et al. “Deep Reinforcement Learning for Scheduling in Large-Scale Networked Control Systems.” Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems, 2019. short: 'A. Redder, A. Ramaswamy, D. Quevedo, in: Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems, 2019.' conference: end_date: 2019-09-17 location: Chicago, USA name: 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems - NECSYS 2019 start_date: 2019-09-16 date_created: 2019-09-23T16:00:58Z date_updated: 2022-01-06T06:51:36Z ddc: - '620' file: - access_level: local content_type: application/pdf creator: aredder date_created: 2019-09-23T15:48:33Z date_updated: 2019-09-23T16:21:16Z file_id: '13444' file_name: ifacconf.pdf file_size: 371429 relation: main_file file_date_updated: 2019-09-23T16:21:16Z has_accepted_license: '1' keyword: - Networked control systems - deep reinforcement learning - large-scale systems - resource scheduling - stochastic control language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1905.05992 oa: '1' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Proceedings of the 8th IFAC Workshop on Distributed Estimation and Control in Networked Systems publication_status: published status: public title: Deep reinforcement learning for scheduling in large-scale networked control systems type: conference user_id: '52265' year: '2019' ... --- _id: '10232' abstract: - lang: eng text: Existing tools for automated machine learning, such as Auto-WEKA, TPOT, auto-sklearn, and more recently ML-Plan, have shown impressive results for the tasks of single-label classification and regression. Yet, there is only little work on other types of machine learning problems so far. In particular, there is almost no work on automating the engineering of machine learning solutions for multi-label classification (MLC). We show how the scope of ML-Plan, an AutoML-tool for multi-class classification, can be extended towards MLC using MEKA, which is a multi-label extension of the well-known Java library WEKA. The resulting approach recursively refines MEKA's multi-label classifiers, nesting other multi-label classifiers for meta algorithms and single-label classifiers provided by WEKA as base learners. In our evaluation, we find that the proposed approach yields strong results and performs significantly better than a set of baselines we compare with. author: - first_name: Marcel Dominik full_name: Wever, Marcel Dominik id: '33176' last_name: Wever orcid: ' https://orcid.org/0000-0001-9782-6818' - first_name: Felix full_name: Mohr, Felix last_name: Mohr - first_name: Alexander full_name: Tornede, Alexander id: '38209' last_name: Tornede - first_name: Eyke full_name: Hüllermeier, Eyke id: '48129' last_name: Hüllermeier citation: ama: 'Wever MD, Mohr F, Tornede A, Hüllermeier E. Automating Multi-Label Classification Extending ML-Plan. In: ; 2019.' apa: Wever, M. D., Mohr, F., Tornede, A., & Hüllermeier, E. (2019). Automating Multi-Label Classification Extending ML-Plan. Presented at the 6th ICML Workshop on Automated Machine Learning (AutoML 2019), Long Beach, CA, USA. bibtex: '@inproceedings{Wever_Mohr_Tornede_Hüllermeier_2019, title={Automating Multi-Label Classification Extending ML-Plan}, author={Wever, Marcel Dominik and Mohr, Felix and Tornede, Alexander and Hüllermeier, Eyke}, year={2019} }' chicago: Wever, Marcel Dominik, Felix Mohr, Alexander Tornede, and Eyke Hüllermeier. “Automating Multi-Label Classification Extending ML-Plan,” 2019. ieee: M. D. Wever, F. Mohr, A. Tornede, and E. Hüllermeier, “Automating Multi-Label Classification Extending ML-Plan,” presented at the 6th ICML Workshop on Automated Machine Learning (AutoML 2019), Long Beach, CA, USA, 2019. mla: Wever, Marcel Dominik, et al. Automating Multi-Label Classification Extending ML-Plan. 2019. short: 'M.D. Wever, F. Mohr, A. Tornede, E. Hüllermeier, in: 2019.' conference: end_date: 2019-06-15 location: Long Beach, CA, USA name: 6th ICML Workshop on Automated Machine Learning (AutoML 2019) start_date: 2019-06-09 date_created: 2019-06-11T21:33:06Z date_updated: 2022-01-06T06:50:33Z ddc: - '006' department: - _id: '355' file: - access_level: open_access content_type: application/pdf creator: wever date_created: 2019-09-10T08:19:01Z date_updated: 2019-09-10T08:20:44Z file_id: '13177' file_name: Automating_MultiLabel_Classification_Extending_ML-Plan.pdf file_size: 388191 relation: main_file file_date_updated: 2019-09-10T08:20:44Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '1' name: SFB 901 - _id: '3' name: SFB 901 - Project Area B - _id: '10' name: SFB 901 - Subproject B2 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing status: public title: Automating Multi-Label Classification Extending ML-Plan type: conference user_id: '33176' year: '2019' ... --- _id: '13647' alternative_title: - Quantifying frequency-dependent absorption phenomena author: - first_name: Leander full_name: Claes, Leander id: '11829' last_name: Claes orcid: 0000-0002-4393-268X - first_name: Sarah full_name: Johannesmann, Sarah id: '29190' last_name: Johannesmann - first_name: Elmar full_name: Baumhögger, Elmar id: '15164' last_name: Baumhögger - first_name: Bernd full_name: Henning, Bernd id: '213' last_name: Henning citation: ama: 'Claes L, Johannesmann S, Baumhögger E, Henning B. Quantification of frequency-dependent absorption phenomena. In: 2019 International Congress on Ultrasonics. ; 2019. doi:10.1121/2.0001043' apa: Claes, L., Johannesmann, S., Baumhögger, E., & Henning, B. (2019). Quantification of frequency-dependent absorption phenomena. In 2019 International Congress on Ultrasonics. Bruges. https://doi.org/10.1121/2.0001043 bibtex: '@inproceedings{Claes_Johannesmann_Baumhögger_Henning_2019, title={Quantification of frequency-dependent absorption phenomena}, DOI={10.1121/2.0001043}, booktitle={2019 International Congress on Ultrasonics}, author={Claes, Leander and Johannesmann, Sarah and Baumhögger, Elmar and Henning, Bernd}, year={2019} }' chicago: Claes, Leander, Sarah Johannesmann, Elmar Baumhögger, and Bernd Henning. “Quantification of Frequency-Dependent Absorption Phenomena.” In 2019 International Congress on Ultrasonics, 2019. https://doi.org/10.1121/2.0001043. ieee: L. Claes, S. Johannesmann, E. Baumhögger, and B. Henning, “Quantification of frequency-dependent absorption phenomena,” in 2019 International Congress on Ultrasonics, Bruges, 2019. mla: Claes, Leander, et al. “Quantification of Frequency-Dependent Absorption Phenomena.” 2019 International Congress on Ultrasonics, 2019, doi:10.1121/2.0001043. short: 'L. Claes, S. Johannesmann, E. Baumhögger, B. Henning, in: 2019 International Congress on Ultrasonics, 2019.' conference: end_date: 2019-09-06 location: Bruges name: 2019 International Congress on Ultrasonics start_date: 2019-09-03 date_created: 2019-10-07T07:16:11Z date_updated: 2022-01-06T06:51:40Z department: - _id: '49' doi: 10.1121/2.0001043 language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: 2019 International Congress on Ultrasonics publication_status: published quality_controlled: '1' status: public title: Quantification of frequency-dependent absorption phenomena type: conference user_id: '11829' year: '2019' ... --- _id: '13230' abstract: - lang: eng text: The behavior of alkali atom point defects in polycrystalline CuInSe2 is studied. In this work, three grain boundary models, one coherent twin boundary and two twin boundaries with dislocation cores, are considered. Total energy calculations show that all alkali metals tend to segregate at the grain boundaries. In addition, the segregation of alkali atoms is more pronounced at the grain boundaries with the dislocation cores. The diffusion of alkali metals along and near grain boundaries is studied as well. The results show that the diffusion of alkali atoms in the grain boundary models is faster than within the bulk. In addition, the ion exchange between Na and Rb atoms at the grain boundaries leads to the Rb enrichment at the grain boundaries and the increase of the Na concentration in the bulk. While the effects of Na and Rb point defects on the electronic structure of the grain boundary with the anion-core dislocation are similar, Rb atoms passivate the grain boundary with the cation-core dislocation more effectively than Na. This can explain the further improvement of the solar cell performance after the RbF-postdeposition treatment. article_type: original author: - first_name: Manjusha full_name: ' Chugh, Manjusha' last_name: ' Chugh' - first_name: ' Thomas D.' full_name: Kühne, Thomas D. last_name: Kühne - first_name: Hossein full_name: Mirhosseini, Hossein id: '71051' last_name: Mirhosseini orcid: https://orcid.org/0000-0001-6179-1545 citation: ama: Chugh M, Kühne Thomas D., Mirhosseini H. Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries. ACS Applied Materials & Interfaces. 2019;11(16):14821−14829. doi:10.1021/acsami.9b02158 apa: Chugh, M., Kühne, Thomas D., & Mirhosseini, H. (2019). Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries. ACS Applied Materials & Interfaces, 11(16), 14821−14829. https://doi.org/10.1021/acsami.9b02158 bibtex: '@article{ Chugh_Kühne_Mirhosseini_2019, title={Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries}, volume={11}, DOI={10.1021/acsami.9b02158}, number={16}, journal={ACS Applied Materials & Interfaces}, publisher={American Chemical Society}, author={ Chugh, Manjusha and Kühne, Thomas D. and Mirhosseini, Hossein}, year={2019}, pages={14821−14829} }' chicago: 'Chugh, Manjusha, Thomas D. Kühne, and Hossein Mirhosseini. “Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries.” ACS Applied Materials & Interfaces 11, no. 16 (2019): 14821−14829. https://doi.org/10.1021/acsami.9b02158.' ieee: 'M. Chugh, Thomas D. Kühne, and H. Mirhosseini, “Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries,” ACS Applied Materials & Interfaces, vol. 11, no. 16, p. 14821−14829, 2019, doi: 10.1021/acsami.9b02158.' mla: Chugh, Manjusha, et al. “Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries.” ACS Applied Materials & Interfaces, vol. 11, no. 16, American Chemical Society, 2019, p. 14821−14829, doi:10.1021/acsami.9b02158. short: M. Chugh, Thomas D. Kühne, H. Mirhosseini, ACS Applied Materials & Interfaces 11 (2019) 14821−14829. date_created: 2019-09-16T10:18:18Z date_updated: 2022-07-21T09:45:19Z department: - _id: '304' doi: 10.1021/acsami.9b02158 intvolume: ' 11' issue: '16' language: - iso: eng page: 14821−14829 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: ACS Applied Materials & Interfaces publication_status: published publisher: American Chemical Society status: public title: Diffusion of Alkali Metals in Polycrystalline CuInSe2 and Their Role in the Passivation of Grain Boundaries type: journal_article user_id: '71051' volume: 11 year: '2019' ... --- _id: '15794' abstract: - lang: eng text: In this paper we present our audio tagging system for the DCASE 2019 Challenge Task 2. We propose a model consisting of a convolutional front end using log-mel-energies as input features, a recurrent neural network sequence encoder and a fully connected classifier network outputting an activity probability for each of the 80 considered event classes. Due to the recurrent neural network, which encodes a whole sequence into a single vector, our model is able to process sequences of varying lengths. The model is trained with only little manually labeled training data and a larger amount of automatically labeled web data, which hence suffers from label noise. To efficiently train the model with the provided data we use various data augmentation to prevent overfitting and improve generalization. Our best submitted system achieves a label-weighted label-ranking average precision (lwlrap) of 75.5% on the private test set which is an absolute improvement of 21.7% over the baseline. This system scored the second place in the teams ranking of the DCASE 2019 Challenge Task 2 and the fifth place in the Kaggle competition “Freesound Audio Tagging 2019” with more than 400 participants. After the challenge ended we further improved performance to 76.5% lwlrap setting a new state-of-the-art on this dataset. author: - first_name: Janek full_name: Ebbers, Janek id: '34851' last_name: Ebbers - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'Ebbers J, Haeb-Umbach R. Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision. In: DCASE2019 Workshop, New York, USA. ; 2019.' apa: Ebbers, J., & Haeb-Umbach, R. (2019). Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision. DCASE2019 Workshop, New York, USA. bibtex: '@inproceedings{Ebbers_Haeb-Umbach_2019, title={Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision}, booktitle={DCASE2019 Workshop, New York, USA}, author={Ebbers, Janek and Haeb-Umbach, Reinhold}, year={2019} }' chicago: Ebbers, Janek, and Reinhold Haeb-Umbach. “Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision.” In DCASE2019 Workshop, New York, USA, 2019. ieee: J. Ebbers and R. Haeb-Umbach, “Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision,” 2019. mla: Ebbers, Janek, and Reinhold Haeb-Umbach. “Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision.” DCASE2019 Workshop, New York, USA, 2019. short: 'J. Ebbers, R. Haeb-Umbach, in: DCASE2019 Workshop, New York, USA, 2019.' date_created: 2020-02-05T10:16:03Z date_updated: 2023-11-22T08:30:12Z ddc: - '000' department: - _id: '54' file: - access_level: open_access content_type: application/pdf creator: huesera date_created: 2020-02-05T10:18:06Z date_updated: 2020-02-05T10:18:06Z file_id: '15795' file_name: DCASE_2019_WS_Ebbers_Paper.pdf file_size: 184967 relation: main_file file_date_updated: 2020-02-05T10:18:06Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: DCASE2019 Workshop, New York, USA quality_controlled: '1' status: public title: Convolutional Recurrent Neural Network and Data Augmentation for Audio Tagging with Noisy Labels and Minimal Supervision type: conference user_id: '34851' year: '2019' ... --- _id: '15796' abstract: - lang: eng text: In this paper we consider human daily activity recognition using an acoustic sensor network (ASN) which consists of nodes distributed in a home environment. Assuming that the ASN is permanently recording, the vast majority of recordings is silence. Therefore, we propose to employ a computationally efficient two-stage sound recognition system, consisting of an initial sound activity detection (SAD) and a subsequent sound event classification (SEC), which is only activated once sound activity has been detected. We show how a low-latency activity detector with high temporal resolution can be trained from weak labels with low temporal resolution. We further demonstrate the advantage of using spatial features for the subsequent event classification task. author: - first_name: Janek full_name: Ebbers, Janek id: '34851' last_name: Ebbers - first_name: Lukas full_name: Drude, Lukas id: '11213' last_name: Drude - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach - first_name: Andreas full_name: Brendel, Andreas last_name: Brendel - first_name: Walter full_name: Kellermann, Walter last_name: Kellermann citation: ama: 'Ebbers J, Drude L, Haeb-Umbach R, Brendel A, Kellermann W. Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks. In: CAMSAP 2019, Guadeloupe, West Indies. ; 2019.' apa: Ebbers, J., Drude, L., Haeb-Umbach, R., Brendel, A., & Kellermann, W. (2019). Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks. CAMSAP 2019, Guadeloupe, West Indies. bibtex: '@inproceedings{Ebbers_Drude_Haeb-Umbach_Brendel_Kellermann_2019, title={Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks}, booktitle={CAMSAP 2019, Guadeloupe, West Indies}, author={Ebbers, Janek and Drude, Lukas and Haeb-Umbach, Reinhold and Brendel, Andreas and Kellermann, Walter}, year={2019} }' chicago: Ebbers, Janek, Lukas Drude, Reinhold Haeb-Umbach, Andreas Brendel, and Walter Kellermann. “Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks.” In CAMSAP 2019, Guadeloupe, West Indies, 2019. ieee: J. Ebbers, L. Drude, R. Haeb-Umbach, A. Brendel, and W. Kellermann, “Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks,” 2019. mla: Ebbers, Janek, et al. “Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks.” CAMSAP 2019, Guadeloupe, West Indies, 2019. short: 'J. Ebbers, L. Drude, R. Haeb-Umbach, A. Brendel, W. Kellermann, in: CAMSAP 2019, Guadeloupe, West Indies, 2019.' date_created: 2020-02-05T10:20:17Z date_updated: 2023-11-22T08:29:58Z ddc: - '000' department: - _id: '54' file: - access_level: open_access content_type: application/pdf creator: huesera date_created: 2020-02-05T10:21:39Z date_updated: 2020-02-05T10:21:39Z file_id: '15797' file_name: CAMSAP_2019_WS_Ebbers_Paper.pdf file_size: 311887 relation: main_file file_date_updated: 2020-02-05T10:21:39Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: CAMSAP 2019, Guadeloupe, West Indies quality_controlled: '1' status: public title: Weakly Supervised Sound Activity Detection and Event Classification in Acoustic Sensor Networks type: conference user_id: '34851' year: '2019' ... --- _id: '16315' abstract: - lang: eng text:

The hard X-ray spectroscopy methods XAS, valence-to-core XES and higher solution XANES offer unique insights into organometallic reaction mechanisms.

author: - first_name: Anke full_name: Schoch, Anke id: '27611' last_name: Schoch orcid: 0000-0002-9457-400X - first_name: Lukas full_name: Burkhardt, Lukas id: '54038' last_name: Burkhardt orcid: 0000-0003-0747-9811 - first_name: Roland full_name: Schoch, Roland id: '48467' last_name: Schoch orcid: 0000-0003-2061-7289 - first_name: Kai full_name: Stührenberg, Kai last_name: Stührenberg - first_name: Matthias full_name: Bauer, Matthias id: '47241' last_name: Bauer orcid: 0000-0002-9294-6076 citation: ama: 'Schoch A, Burkhardt L, Schoch R, Stührenberg K, Bauer M. Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?). Faraday Discussions. Published online 2019:113-132. doi:10.1039/c9fd00070d' apa: 'Schoch, A., Burkhardt, L., Schoch, R., Stührenberg, K., & Bauer, M. (2019). Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?). Faraday Discussions, 113–132. https://doi.org/10.1039/c9fd00070d' bibtex: '@article{Schoch_Burkhardt_Schoch_Stührenberg_Bauer_2019, title={Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?)}, DOI={10.1039/c9fd00070d}, journal={Faraday Discussions}, author={Schoch, Anke and Burkhardt, Lukas and Schoch, Roland and Stührenberg, Kai and Bauer, Matthias}, year={2019}, pages={113–132} }' chicago: 'Schoch, Anke, Lukas Burkhardt, Roland Schoch, Kai Stührenberg, and Matthias Bauer. “Hard X-Ray Spectroscopy: An Exhaustive Toolbox for Mechanistic Studies (?).” Faraday Discussions, 2019, 113–32. https://doi.org/10.1039/c9fd00070d.' ieee: 'A. Schoch, L. Burkhardt, R. Schoch, K. Stührenberg, and M. Bauer, “Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?),” Faraday Discussions, pp. 113–132, 2019, doi: 10.1039/c9fd00070d.' mla: 'Schoch, Anke, et al. “Hard X-Ray Spectroscopy: An Exhaustive Toolbox for Mechanistic Studies (?).” Faraday Discussions, 2019, pp. 113–32, doi:10.1039/c9fd00070d.' short: A. Schoch, L. Burkhardt, R. Schoch, K. Stührenberg, M. Bauer, Faraday Discussions (2019) 113–132. date_created: 2020-03-23T10:39:53Z date_updated: 2024-03-07T10:11:03Z department: - _id: '43' - _id: '35' - _id: '306' doi: 10.1039/c9fd00070d language: - iso: eng page: 113-132 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Faraday Discussions publication_identifier: issn: - 1359-6640 - 1364-5498 publication_status: published status: public title: 'Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?)' type: journal_article user_id: '48467' year: '2019' ... --- _id: '15249' author: - first_name: Matti full_name: Grabo, Matti id: '66520' last_name: Grabo - first_name: Christoph full_name: Staggenborg, Christoph last_name: Staggenborg - first_name: Eugeny full_name: Kenig, Eugeny id: '665' last_name: Kenig citation: ama: 'Grabo M, Staggenborg C, Kenig E. Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen. In: ; 2019.' apa: 'Grabo, M., Staggenborg, C., & Kenig, E. (2019). Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen. Wärmeübertragung mit Phasenwechsel in fluiden Systemen: Ein Update, Paderborn.' bibtex: '@inproceedings{Grabo_Staggenborg_Kenig_2019, title={Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen}, author={Grabo, Matti and Staggenborg, Christoph and Kenig, Eugeny}, year={2019} }' chicago: Grabo, Matti, Christoph Staggenborg, and Eugeny Kenig. “Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen,” 2019. ieee: 'M. Grabo, C. Staggenborg, and E. Kenig, “Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen,” presented at the Wärmeübertragung mit Phasenwechsel in fluiden Systemen: Ein Update, Paderborn, 2019.' mla: Grabo, Matti, et al. Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen. 2019. short: 'M. Grabo, C. Staggenborg, E. Kenig, in: 2019.' conference: location: Paderborn name: 'Wärmeübertragung mit Phasenwechsel in fluiden Systemen: Ein Update' date_created: 2019-12-05T10:09:36Z date_updated: 2024-03-18T13:28:34Z department: - _id: '9' - _id: '145' language: - iso: ger project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing status: public title: Modellierung und Optimierung von makroverkapselten Latentwärmespeicherelementen type: conference_abstract user_id: '66520' year: '2019' ... --- _id: '16959' author: - first_name: A. full_name: Ferreri, A. last_name: Ferreri - first_name: P. full_name: Sharapova, P. last_name: Sharapova - first_name: Kai Hong full_name: Luo, Kai Hong id: '36389' last_name: Luo orcid: 0000-0003-1008-4976 - first_name: H. full_name: Herrmann, H. last_name: Herrmann - first_name: C. full_name: Silberhorn, C. last_name: Silberhorn citation: ama: 'Ferreri A, Sharapova P, Luo KH, Herrmann H, Silberhorn C. Theoretical description of a multimode SU(1,1) interferometer. In: Quantum Information and Measurement (QIM) V: Quantum Technologies. ; 2019. doi:10.1364/qim.2019.t5a.35' apa: 'Ferreri, A., Sharapova, P., Luo, K. H., Herrmann, H., & Silberhorn, C. (2019). Theoretical description of a multimode SU(1,1) interferometer. Quantum Information and Measurement (QIM) V: Quantum Technologies. https://doi.org/10.1364/qim.2019.t5a.35' bibtex: '@inproceedings{Ferreri_Sharapova_Luo_Herrmann_Silberhorn_2019, title={Theoretical description of a multimode SU(1,1) interferometer}, DOI={10.1364/qim.2019.t5a.35}, booktitle={Quantum Information and Measurement (QIM) V: Quantum Technologies}, author={Ferreri, A. and Sharapova, P. and Luo, Kai Hong and Herrmann, H. and Silberhorn, C.}, year={2019} }' chicago: 'Ferreri, A., P. Sharapova, Kai Hong Luo, H. Herrmann, and C. Silberhorn. “Theoretical Description of a Multimode SU(1,1) Interferometer.” In Quantum Information and Measurement (QIM) V: Quantum Technologies, 2019. https://doi.org/10.1364/qim.2019.t5a.35.' ieee: 'A. Ferreri, P. Sharapova, K. H. Luo, H. Herrmann, and C. Silberhorn, “Theoretical description of a multimode SU(1,1) interferometer,” 2019, doi: 10.1364/qim.2019.t5a.35.' mla: 'Ferreri, A., et al. “Theoretical Description of a Multimode SU(1,1) Interferometer.” Quantum Information and Measurement (QIM) V: Quantum Technologies, 2019, doi:10.1364/qim.2019.t5a.35.' short: 'A. Ferreri, P. Sharapova, K.H. Luo, H. Herrmann, C. Silberhorn, in: Quantum Information and Measurement (QIM) V: Quantum Technologies, 2019.' date_created: 2020-05-15T09:21:25Z date_updated: 2023-02-10T16:01:51Z doi: 10.1364/qim.2019.t5a.35 keyword: - pc2-ressources language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: 'Quantum Information and Measurement (QIM) V: Quantum Technologies' publication_identifier: isbn: - '9781943580569' publication_status: published status: public title: Theoretical description of a multimode SU(1,1) interferometer type: conference user_id: '14931' year: '2019' ... --- _id: '16945' author: - first_name: Matvei full_name: Riabinin, Matvei last_name: Riabinin - first_name: Polina full_name: Sharapova, Polina id: '60286' last_name: Sharapova - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Riabinin M, Sharapova P, Bartley T, Meier T. Generating two-mode squeezing and Schrödinger cat states with multimode measurement-induced nonlinearity. Published online 2019. apa: Riabinin, M., Sharapova, P., Bartley, T., & Meier, T. (2019). Generating two-mode squeezing and Schrödinger cat states with multimode measurement-induced nonlinearity. bibtex: '@article{Riabinin_Sharapova_Bartley_Meier_2019, title={Generating two-mode squeezing and Schrödinger cat states with multimode measurement-induced nonlinearity}, author={Riabinin, Matvei and Sharapova, Polina and Bartley, Tim and Meier, Torsten}, year={2019} }' chicago: Riabinin, Matvei, Polina Sharapova, Tim Bartley, and Torsten Meier. “Generating Two-Mode Squeezing and Schrödinger Cat States with Multimode Measurement-Induced Nonlinearity,” 2019. ieee: M. Riabinin, P. Sharapova, T. Bartley, and T. Meier, “Generating two-mode squeezing and Schrödinger cat states with multimode measurement-induced nonlinearity.” 2019. mla: Riabinin, Matvei, et al. Generating Two-Mode Squeezing and Schrödinger Cat States with Multimode Measurement-Induced Nonlinearity. 2019. short: M. Riabinin, P. Sharapova, T. Bartley, T. Meier, (2019). date_created: 2020-05-08T09:13:02Z date_updated: 2023-02-10T16:05:00Z keyword: - pc2-ressources language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing status: public title: Generating two-mode squeezing and Schrödinger cat states with multimode measurement-induced nonlinearity type: preprint user_id: '14931' year: '2019' ... --- _id: '10014' abstract: - lang: eng text: The cubic, tetragonal, and orthorhombic phase of potassium niobate (KNbO3) are studied based on density-functional theory. Starting from the relaxed atomic geometries, we analyze the influence of self-energy corrections on the electronic band structure within the GW approximation. We find that quasiparticle shifts widen the direct (indirect) band gap by 1.21 (1.44), 1.58 (1.55), and 1.67 (1.64) eV for the cubic, tetragonal, and orthorhombic phase, respectively. By solving the Bethe-Salpeter equation, we obtain the linear dielectric function with excitonic and local-field effects, which turn out to be essential for good agreement with experimental data. From our results, we extract an exciton binding energy of 0.6, 0.5, and 0.5 eV for the cubic, tetragonal, and orthorhombic phase, respectively. Furthermore, we investigate the nonlinear second-harmonic generation (SHG) both theoretically and experimentally. The frequency-dependent second-order polarization tensor of orthorhombic KNbO3 is measured for incoming photon energies between 1.2 and 1.6 eV. In addition, calculations within the independent-(quasi)particle approximation are performed for the tetragonal and orthorhombic phase. The novel experimental data are in excellent agreement with the quasiparticle calculations and resolve persistent discrepancies between earlier experimental measurements and ab initio results reported in the literature. article_number: '054401' article_type: original author: - first_name: Falko full_name: Schmidt, Falko id: '35251' last_name: Schmidt orcid: 0000-0002-5071-5528 - first_name: Arthur full_name: Riefer, Arthur last_name: Riefer - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Arno full_name: Schindlmayr, Arno id: '458' last_name: Schindlmayr orcid: 0000-0002-4855-071X - first_name: Mirco full_name: Imlau, Mirco last_name: Imlau - first_name: Florian full_name: Dobener, Florian last_name: Dobener - first_name: Nils full_name: Mengel, Nils last_name: Mengel - first_name: Sangam full_name: Chatterjee, Sangam last_name: Chatterjee - first_name: Simone full_name: Sanna, Simone last_name: Sanna citation: ama: Schmidt F, Riefer A, Schmidt WG, et al. Quasiparticle and excitonic effects in the optical response of KNbO3. Physical Review Materials. 2019;3(5). doi:10.1103/PhysRevMaterials.3.054401 apa: Schmidt, F., Riefer, A., Schmidt, W. G., Schindlmayr, A., Imlau, M., Dobener, F., Mengel, N., Chatterjee, S., & Sanna, S. (2019). Quasiparticle and excitonic effects in the optical response of KNbO3. Physical Review Materials, 3(5), Article 054401. https://doi.org/10.1103/PhysRevMaterials.3.054401 bibtex: '@article{Schmidt_Riefer_Schmidt_Schindlmayr_Imlau_Dobener_Mengel_Chatterjee_Sanna_2019, title={Quasiparticle and excitonic effects in the optical response of KNbO3}, volume={3}, DOI={10.1103/PhysRevMaterials.3.054401}, number={5054401}, journal={Physical Review Materials}, publisher={American Physical Society}, author={Schmidt, Falko and Riefer, Arthur and Schmidt, Wolf Gero and Schindlmayr, Arno and Imlau, Mirco and Dobener, Florian and Mengel, Nils and Chatterjee, Sangam and Sanna, Simone}, year={2019} }' chicago: Schmidt, Falko, Arthur Riefer, Wolf Gero Schmidt, Arno Schindlmayr, Mirco Imlau, Florian Dobener, Nils Mengel, Sangam Chatterjee, and Simone Sanna. “Quasiparticle and Excitonic Effects in the Optical Response of KNbO3.” Physical Review Materials 3, no. 5 (2019). https://doi.org/10.1103/PhysRevMaterials.3.054401. ieee: 'F. Schmidt et al., “Quasiparticle and excitonic effects in the optical response of KNbO3,” Physical Review Materials, vol. 3, no. 5, Art. no. 054401, 2019, doi: 10.1103/PhysRevMaterials.3.054401.' mla: Schmidt, Falko, et al. “Quasiparticle and Excitonic Effects in the Optical Response of KNbO3.” Physical Review Materials, vol. 3, no. 5, 054401, American Physical Society, 2019, doi:10.1103/PhysRevMaterials.3.054401. short: F. Schmidt, A. Riefer, W.G. Schmidt, A. Schindlmayr, M. Imlau, F. Dobener, N. Mengel, S. Chatterjee, S. Sanna, Physical Review Materials 3 (2019). date_created: 2019-05-29T06:55:29Z date_updated: 2023-04-20T14:20:33Z ddc: - '530' department: - _id: '295' - _id: '296' - _id: '230' - _id: '429' - _id: '170' - _id: '35' doi: 10.1103/PhysRevMaterials.3.054401 external_id: isi: - '000467044000003' file: - access_level: open_access content_type: application/pdf creator: schindlm date_created: 2020-08-27T19:05:54Z date_updated: 2020-08-30T14:34:33Z description: © 2019 American Physical Society file_id: '18465' file_name: PhysRevMaterials.3.054401.pdf file_size: 1949504 relation: main_file title: Quasiparticle and excitonic effects in the optical response of KNbO3 file_date_updated: 2020-08-30T14:34:33Z has_accepted_license: '1' intvolume: ' 3' isi: '1' issue: '5' language: - iso: eng oa: '1' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: TRR 142 - _id: '55' name: TRR 142 - Project Area B - _id: '69' name: TRR 142 - Subproject B4 - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Physical Review Materials publication_identifier: eissn: - 2475-9953 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Quasiparticle and excitonic effects in the optical response of KNbO3 type: journal_article user_id: '16199' volume: 3 year: '2019' ... --- _id: '29746' article_number: '155107' author: - first_name: C. W. full_name: Nicholson, C. W. last_name: Nicholson - first_name: M. full_name: Puppin, M. last_name: Puppin - first_name: A. full_name: Lücke, A. last_name: Lücke - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X - first_name: Marvin full_name: Krenz, Marvin id: '52309' last_name: Krenz - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: L. full_name: Rettig, L. last_name: Rettig - first_name: R. full_name: Ernstorfer, R. last_name: Ernstorfer - first_name: M. full_name: Wolf, M. last_name: Wolf citation: ama: Nicholson CW, Puppin M, Lücke A, et al. Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy. Physical Review B. 2019;99(15). doi:10.1103/physrevb.99.155107 apa: Nicholson, C. W., Puppin, M., Lücke, A., Gerstmann, U., Krenz, M., Schmidt, W. G., Rettig, L., Ernstorfer, R., & Wolf, M. (2019). Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy. Physical Review B, 99(15), Article 155107. https://doi.org/10.1103/physrevb.99.155107 bibtex: '@article{Nicholson_Puppin_Lücke_Gerstmann_Krenz_Schmidt_Rettig_Ernstorfer_Wolf_2019, title={Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy}, volume={99}, DOI={10.1103/physrevb.99.155107}, number={15155107}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Nicholson, C. W. and Puppin, M. and Lücke, A. and Gerstmann, Uwe and Krenz, Marvin and Schmidt, Wolf Gero and Rettig, L. and Ernstorfer, R. and Wolf, M.}, year={2019} }' chicago: Nicholson, C. W., M. Puppin, A. Lücke, Uwe Gerstmann, Marvin Krenz, Wolf Gero Schmidt, L. Rettig, R. Ernstorfer, and M. Wolf. “Excited-State Band Mapping and Momentum-Resolved Ultrafast Population Dynamics in In/Si(111) Nanowires Investigated with XUV-Based Time- and Angle-Resolved Photoemission Spectroscopy.” Physical Review B 99, no. 15 (2019). https://doi.org/10.1103/physrevb.99.155107. ieee: 'C. W. Nicholson et al., “Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy,” Physical Review B, vol. 99, no. 15, Art. no. 155107, 2019, doi: 10.1103/physrevb.99.155107.' mla: Nicholson, C. W., et al. “Excited-State Band Mapping and Momentum-Resolved Ultrafast Population Dynamics in In/Si(111) Nanowires Investigated with XUV-Based Time- and Angle-Resolved Photoemission Spectroscopy.” Physical Review B, vol. 99, no. 15, 155107, American Physical Society (APS), 2019, doi:10.1103/physrevb.99.155107. short: C.W. Nicholson, M. Puppin, A. Lücke, U. Gerstmann, M. Krenz, W.G. Schmidt, L. Rettig, R. Ernstorfer, M. Wolf, Physical Review B 99 (2019). date_created: 2022-02-03T15:26:06Z date_updated: 2023-04-20T14:22:46Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '230' - _id: '35' doi: 10.1103/physrevb.99.155107 intvolume: ' 99' issue: '15' language: - iso: eng project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '69' name: 'TRR 142 - B4: TRR 142 - Subproject B4' publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published publisher: American Physical Society (APS) status: public title: Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy type: journal_article user_id: '16199' volume: 99 year: '2019' ... --- _id: '10015' author: - first_name: Christof full_name: Dues, Christof last_name: Dues - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Simone full_name: Sanna, Simone last_name: Sanna citation: ama: Dues C, Schmidt WG, Sanna S. Water Splitting Reaction at Polar Lithium Niobate Surfaces. ACS Omega. Published online 2019:3850-3859. doi:10.1021/acsomega.8b03271 apa: Dues, C., Schmidt, W. G., & Sanna, S. (2019). Water Splitting Reaction at Polar Lithium Niobate Surfaces. ACS Omega, 3850–3859. https://doi.org/10.1021/acsomega.8b03271 bibtex: '@article{Dues_Schmidt_Sanna_2019, title={Water Splitting Reaction at Polar Lithium Niobate Surfaces}, DOI={10.1021/acsomega.8b03271}, journal={ACS Omega}, author={Dues, Christof and Schmidt, Wolf Gero and Sanna, Simone}, year={2019}, pages={3850–3859} }' chicago: Dues, Christof, Wolf Gero Schmidt, and Simone Sanna. “Water Splitting Reaction at Polar Lithium Niobate Surfaces.” ACS Omega, 2019, 3850–59. https://doi.org/10.1021/acsomega.8b03271. ieee: 'C. Dues, W. G. Schmidt, and S. Sanna, “Water Splitting Reaction at Polar Lithium Niobate Surfaces,” ACS Omega, pp. 3850–3859, 2019, doi: 10.1021/acsomega.8b03271.' mla: Dues, Christof, et al. “Water Splitting Reaction at Polar Lithium Niobate Surfaces.” ACS Omega, 2019, pp. 3850–59, doi:10.1021/acsomega.8b03271. short: C. Dues, W.G. Schmidt, S. Sanna, ACS Omega (2019) 3850–3859. date_created: 2019-05-29T07:15:06Z date_updated: 2023-04-20T14:21:28Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '35' doi: 10.1021/acsomega.8b03271 funded_apc: '1' language: - iso: eng page: 3850-3859 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: TRR 142 - _id: '55' name: TRR 142 - Project Area B - _id: '69' name: TRR 142 - Subproject B4 - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: ACS Omega publication_identifier: issn: - 2470-1343 - 2470-1343 publication_status: published status: public title: Water Splitting Reaction at Polar Lithium Niobate Surfaces type: journal_article user_id: '16199' year: '2019' ... --- _id: '37288' abstract: - lang: eng text: An integrated chip with quantum state generation, active polarization manipulation, and precise time control is demonstrated. author: - first_name: Kai-Hong full_name: Luo, Kai-Hong id: '36389' last_name: Luo orcid: 0000-0003-1008-4976 - first_name: Sebastian full_name: Brauner, Sebastian id: '38161' last_name: Brauner - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Polina full_name: Sharapova, Polina id: '60286' last_name: Sharapova - first_name: Raimund full_name: Ricken, Raimund last_name: Ricken - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Harald full_name: Herrmann, Harald id: '216' last_name: Herrmann - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Luo K-H, Brauner S, Eigner C, et al. Nonlinear integrated quantum electro-optic circuits. Science Advances. 2019;5(1). doi:10.1126/sciadv.aat1451 apa: Luo, K.-H., Brauner, S., Eigner, C., Sharapova, P., Ricken, R., Meier, T., Herrmann, H., & Silberhorn, C. (2019). Nonlinear integrated quantum electro-optic circuits. Science Advances, 5(1). https://doi.org/10.1126/sciadv.aat1451 bibtex: '@article{Luo_Brauner_Eigner_Sharapova_Ricken_Meier_Herrmann_Silberhorn_2019, title={Nonlinear integrated quantum electro-optic circuits}, volume={5}, DOI={10.1126/sciadv.aat1451}, number={1}, journal={Science Advances}, publisher={American Association for the Advancement of Science (AAAS)}, author={Luo, Kai-Hong and Brauner, Sebastian and Eigner, Christof and Sharapova, Polina and Ricken, Raimund and Meier, Torsten and Herrmann, Harald and Silberhorn, Christine}, year={2019} }' chicago: Luo, Kai-Hong, Sebastian Brauner, Christof Eigner, Polina Sharapova, Raimund Ricken, Torsten Meier, Harald Herrmann, and Christine Silberhorn. “Nonlinear Integrated Quantum Electro-Optic Circuits.” Science Advances 5, no. 1 (2019). https://doi.org/10.1126/sciadv.aat1451. ieee: 'K.-H. Luo et al., “Nonlinear integrated quantum electro-optic circuits,” Science Advances, vol. 5, no. 1, 2019, doi: 10.1126/sciadv.aat1451.' mla: Luo, Kai-Hong, et al. “Nonlinear Integrated Quantum Electro-Optic Circuits.” Science Advances, vol. 5, no. 1, American Association for the Advancement of Science (AAAS), 2019, doi:10.1126/sciadv.aat1451. short: K.-H. Luo, S. Brauner, C. Eigner, P. Sharapova, R. Ricken, T. Meier, H. Herrmann, C. Silberhorn, Science Advances 5 (2019). date_created: 2023-01-18T10:35:19Z date_updated: 2023-04-21T11:25:39Z department: - _id: '15' - _id: '569' - _id: '170' - _id: '293' - _id: '230' - _id: '623' - _id: '429' - _id: '35' doi: 10.1126/sciadv.aat1451 intvolume: ' 5' issue: '1' keyword: - Multidisciplinary language: - iso: eng project: - _id: '53' name: 'TRR 142: TRR 142' - _id: '56' name: 'TRR 142 - C: TRR 142 - Project Area C' - _id: '72' name: 'TRR 142 - C2: TRR 142 - Subproject C2' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Science Advances publication_identifier: issn: - 2375-2548 publication_status: published publisher: American Association for the Advancement of Science (AAAS) status: public title: Nonlinear integrated quantum electro-optic circuits type: journal_article user_id: '16199' volume: 5 year: '2019' ... --- _id: '13285' article_number: 109160O author: - first_name: Wolf-Rüdiger full_name: Hannes, Wolf-Rüdiger last_name: Hannes - first_name: Laura full_name: Krauß-Kodytek, Laura last_name: Krauß-Kodytek - first_name: Claudia full_name: Ruppert, Claudia last_name: Ruppert - first_name: Markus full_name: Betz, Markus last_name: Betz - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: 'Hannes W-R, Krauß-Kodytek L, Ruppert C, Betz M, Meier T. Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors. In: Betz M, Elezzabi AY, eds. Ultrafast Phenomena and Nanophotonics XXIII. Vol 10916. SPIE Proceedings. ; 2019. doi:10.1117/12.2503539' apa: Hannes, W.-R., Krauß-Kodytek, L., Ruppert, C., Betz, M., & Meier, T. (2019). Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors. In M. Betz & A. Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXIII (No. 109160O; Vol. 10916). https://doi.org/10.1117/12.2503539 bibtex: '@inproceedings{Hannes_Krauß-Kodytek_Ruppert_Betz_Meier_2019, series={SPIE Proceedings}, title={Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors}, volume={10916}, DOI={10.1117/12.2503539}, number={109160O}, booktitle={Ultrafast Phenomena and Nanophotonics XXIII}, author={Hannes, Wolf-Rüdiger and Krauß-Kodytek, Laura and Ruppert, Claudia and Betz, Markus and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2019}, collection={SPIE Proceedings} }' chicago: Hannes, Wolf-Rüdiger, Laura Krauß-Kodytek, Claudia Ruppert, Markus Betz, and Torsten Meier. “Intensity-Dependent Degenerate and Non-Degenerate Nonlinear Optical Absorption of Direct-Gap Semiconductors.” In Ultrafast Phenomena and Nanophotonics XXIII, edited by Markus Betz and Abdulhakem Y. Elezzabi, Vol. 10916. SPIE Proceedings, 2019. https://doi.org/10.1117/12.2503539. ieee: 'W.-R. Hannes, L. Krauß-Kodytek, C. Ruppert, M. Betz, and T. Meier, “Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors,” in Ultrafast Phenomena and Nanophotonics XXIII, 2019, vol. 10916, doi: 10.1117/12.2503539.' mla: Hannes, Wolf-Rüdiger, et al. “Intensity-Dependent Degenerate and Non-Degenerate Nonlinear Optical Absorption of Direct-Gap Semiconductors.” Ultrafast Phenomena and Nanophotonics XXIII, edited by Markus Betz and Abdulhakem Y. Elezzabi, vol. 10916, 109160O, 2019, doi:10.1117/12.2503539. short: 'W.-R. Hannes, L. Krauß-Kodytek, C. Ruppert, M. Betz, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXIII, 2019.' date_created: 2019-09-18T14:22:29Z date_updated: 2023-04-21T11:26:51Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '35' - _id: '230' doi: 10.1117/12.2503539 editor: - first_name: Markus full_name: Betz, Markus last_name: Betz - first_name: Abdulhakem Y. full_name: Elezzabi, Abdulhakem Y. last_name: Elezzabi intvolume: ' 10916' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: TRR 142 - _id: '54' name: TRR 142 - Project Area A - _id: '64' name: TRR 142 - Subproject A7 - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Ultrafast Phenomena and Nanophotonics XXIII publication_identifier: isbn: - '9781510624740' - '9781510624757' publication_status: published series_title: SPIE Proceedings status: public title: Intensity-dependent degenerate and non-degenerate nonlinear optical absorption of direct-gap semiconductors type: conference user_id: '16199' volume: 10916 year: '2019' ... --- _id: '13284' article_number: '125301' author: - first_name: Wolf-Rüdiger full_name: Hannes, Wolf-Rüdiger id: '66789' last_name: Hannes orcid: https://orcid.org/0000-0003-1210-4838 - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Hannes W-R, Meier T. Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model. Physical Review B. 2019;99(12). doi:10.1103/physrevb.99.125301 apa: Hannes, W.-R., & Meier, T. (2019). Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model. Physical Review B, 99(12), Article 125301. https://doi.org/10.1103/physrevb.99.125301 bibtex: '@article{Hannes_Meier_2019, title={Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model}, volume={99}, DOI={10.1103/physrevb.99.125301}, number={12125301}, journal={Physical Review B}, author={Hannes, Wolf-Rüdiger and Meier, Torsten}, year={2019} }' chicago: Hannes, Wolf-Rüdiger, and Torsten Meier. “Higher-Order Contributions and Nonperturbative Effects in the Nondegenerate Nonlinear Optical Absorption of Semiconductors Using a Two-Band Model.” Physical Review B 99, no. 12 (2019). https://doi.org/10.1103/physrevb.99.125301. ieee: 'W.-R. Hannes and T. Meier, “Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model,” Physical Review B, vol. 99, no. 12, Art. no. 125301, 2019, doi: 10.1103/physrevb.99.125301.' mla: Hannes, Wolf-Rüdiger, and Torsten Meier. “Higher-Order Contributions and Nonperturbative Effects in the Nondegenerate Nonlinear Optical Absorption of Semiconductors Using a Two-Band Model.” Physical Review B, vol. 99, no. 12, 125301, 2019, doi:10.1103/physrevb.99.125301. short: W.-R. Hannes, T. Meier, Physical Review B 99 (2019). date_created: 2019-09-18T14:18:05Z date_updated: 2023-04-21T11:26:19Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' - _id: '429' - _id: '35' doi: 10.1103/physrevb.99.125301 intvolume: ' 99' issue: '12' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '64' name: TRR 142 - Subproject A7 - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published status: public title: Higher-order contributions and nonperturbative effects in the nondegenerate nonlinear optical absorption of semiconductors using a two-band model type: journal_article user_id: '16199' volume: 99 year: '2019' ... --- _id: '13365' abstract: - lang: eng text: 'The KTiOPO4 (KTP) band structure and dielectric function are calculated on various levels of theory starting from density-functional calculations. Within the independent-particle approximation an electronic transport gap of 2.97 eV is obtained that widens to about 5.23 eV when quasiparticle effects are included using the GW approximation. The optical response is shown to be strongly anisotropic due to (i) the slight asymmetry of the TiO6 octahedra in the (001) plane and (ii) their anisotropic distribution along the [001] and [100] directions. In addition, excitonic effects are very important: The solution of the Bethe–Salpeter equation indicates exciton binding energies of the order of 1.5 eV. Calculations that include both quasiparticle and excitonic effects are in good agreement with the measured reflectivity.' article_type: original author: - first_name: Sergej full_name: Neufeld, Sergej id: '23261' last_name: Neufeld - first_name: Adriana full_name: Bocchini, Adriana id: '58349' last_name: Bocchini orcid: https://orcid.org/0000-0002-2134-3075 - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X - first_name: Arno full_name: Schindlmayr, Arno id: '458' last_name: Schindlmayr orcid: 0000-0002-4855-071X - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 citation: ama: 'Neufeld S, Bocchini A, Gerstmann U, Schindlmayr A, Schmidt WG. Potassium titanyl phosphate (KTP) quasiparticle energies and optical response. Journal of Physics: Materials. 2019;2:045003. doi:10.1088/2515-7639/ab29ba' apa: 'Neufeld, S., Bocchini, A., Gerstmann, U., Schindlmayr, A., & Schmidt, W. G. (2019). Potassium titanyl phosphate (KTP) quasiparticle energies and optical response. Journal of Physics: Materials, 2, 045003. https://doi.org/10.1088/2515-7639/ab29ba' bibtex: '@article{Neufeld_Bocchini_Gerstmann_Schindlmayr_Schmidt_2019, title={Potassium titanyl phosphate (KTP) quasiparticle energies and optical response}, volume={2}, DOI={10.1088/2515-7639/ab29ba}, journal={Journal of Physics: Materials}, publisher={IOP Publishing}, author={Neufeld, Sergej and Bocchini, Adriana and Gerstmann, Uwe and Schindlmayr, Arno and Schmidt, Wolf Gero}, year={2019}, pages={045003} }' chicago: 'Neufeld, Sergej, Adriana Bocchini, Uwe Gerstmann, Arno Schindlmayr, and Wolf Gero Schmidt. “Potassium Titanyl Phosphate (KTP) Quasiparticle Energies and Optical Response.” Journal of Physics: Materials 2 (2019): 045003. https://doi.org/10.1088/2515-7639/ab29ba.' ieee: 'S. Neufeld, A. Bocchini, U. Gerstmann, A. Schindlmayr, and W. G. Schmidt, “Potassium titanyl phosphate (KTP) quasiparticle energies and optical response,” Journal of Physics: Materials, vol. 2, p. 045003, 2019, doi: 10.1088/2515-7639/ab29ba.' mla: 'Neufeld, Sergej, et al. “Potassium Titanyl Phosphate (KTP) Quasiparticle Energies and Optical Response.” Journal of Physics: Materials, vol. 2, IOP Publishing, 2019, p. 045003, doi:10.1088/2515-7639/ab29ba.' short: 'S. Neufeld, A. Bocchini, U. Gerstmann, A. Schindlmayr, W.G. Schmidt, Journal of Physics: Materials 2 (2019) 045003.' date_created: 2019-09-19T14:34:16Z date_updated: 2023-04-21T11:36:12Z ddc: - '530' department: - _id: '296' - _id: '295' - _id: '230' - _id: '429' - _id: '170' - _id: '35' doi: 10.1088/2515-7639/ab29ba external_id: isi: - '000560410300003' file: - access_level: open_access content_type: application/pdf creator: schindlm date_created: 2020-08-28T09:07:18Z date_updated: 2020-08-30T14:29:27Z description: Creative Commons Attribution 3.0 Unported Public License (CC BY 3.0) file_id: '18535' file_name: Neufeld_2019_J._Phys._Mater._2_045003.pdf file_size: 1481174 relation: main_file title: Potassium titanyl phosphate (KTP) quasiparticle energies and optical response file_date_updated: 2020-08-30T14:29:27Z has_accepted_license: '1' intvolume: ' 2' isi: '1' language: - iso: eng oa: '1' page: '045003' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: TRR 142 - _id: '55' name: TRR 142 - Project Area B - _id: '69' name: TRR 142 - Subproject B4 - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: 'Journal of Physics: Materials' publication_identifier: eissn: - 2515-7639 publication_status: published publisher: IOP Publishing quality_controlled: '1' status: public title: Potassium titanyl phosphate (KTP) quasiparticle energies and optical response type: journal_article user_id: '171' volume: 2 year: '2019' ... --- _id: '13900' author: - first_name: Xiaohong full_name: Song, Xiaohong last_name: Song - first_name: Ruixin full_name: Zuo, Ruixin last_name: Zuo - first_name: Shidong full_name: Yang, Shidong last_name: Yang - first_name: Pengcheng full_name: Li, Pengcheng last_name: Li - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Weifeng full_name: Yang, Weifeng last_name: Yang citation: ama: Song X, Zuo R, Yang S, Li P, Meier T, Yang W. Attosecond temporal confinement of interband excitation by intraband motion. Optics Express. 2019;27(3):2225-2234. doi:10.1364/oe.27.002225 apa: Song, X., Zuo, R., Yang, S., Li, P., Meier, T., & Yang, W. (2019). Attosecond temporal confinement of interband excitation by intraband motion. Optics Express, 27(3), 2225–2234. https://doi.org/10.1364/oe.27.002225 bibtex: '@article{Song_Zuo_Yang_Li_Meier_Yang_2019, title={Attosecond temporal confinement of interband excitation by intraband motion}, volume={27}, DOI={10.1364/oe.27.002225}, number={3}, journal={Optics Express}, author={Song, Xiaohong and Zuo, Ruixin and Yang, Shidong and Li, Pengcheng and Meier, Torsten and Yang, Weifeng}, year={2019}, pages={2225–2234} }' chicago: 'Song, Xiaohong, Ruixin Zuo, Shidong Yang, Pengcheng Li, Torsten Meier, and Weifeng Yang. “Attosecond Temporal Confinement of Interband Excitation by Intraband Motion.” Optics Express 27, no. 3 (2019): 2225–34. https://doi.org/10.1364/oe.27.002225.' ieee: 'X. Song, R. Zuo, S. Yang, P. Li, T. Meier, and W. Yang, “Attosecond temporal confinement of interband excitation by intraband motion,” Optics Express, vol. 27, no. 3, pp. 2225–2234, 2019, doi: 10.1364/oe.27.002225.' mla: Song, Xiaohong, et al. “Attosecond Temporal Confinement of Interband Excitation by Intraband Motion.” Optics Express, vol. 27, no. 3, 2019, pp. 2225–34, doi:10.1364/oe.27.002225. short: X. Song, R. Zuo, S. Yang, P. Li, T. Meier, W. Yang, Optics Express 27 (2019) 2225–2234. date_created: 2019-10-18T07:35:35Z date_updated: 2023-04-21T11:27:40Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '35' - _id: '429' doi: 10.1364/oe.27.002225 intvolume: ' 27' issue: '3' language: - iso: eng page: 2225-2234 project: - _id: '53' name: TRR 142 - _id: '54' name: TRR 142 - Project Area A - _id: '64' name: TRR 142 - Subproject A7 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published status: public title: Attosecond temporal confinement of interband excitation by intraband motion type: journal_article user_id: '16199' volume: 27 year: '2019' ... --- _id: '13283' article_number: '045308' author: - first_name: Huynh Thanh full_name: Duc, Huynh Thanh last_name: Duc - first_name: Cong full_name: Ngo, Cong last_name: Ngo - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Duc HT, Ngo C, Meier T. Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons. Physical Review B. 2019;100(4). doi:10.1103/physrevb.100.045308 apa: Duc, H. T., Ngo, C., & Meier, T. (2019). Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons. Physical Review B, 100(4), Article 045308. https://doi.org/10.1103/physrevb.100.045308 bibtex: '@article{Duc_Ngo_Meier_2019, title={Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons}, volume={100}, DOI={10.1103/physrevb.100.045308}, number={4045308}, journal={Physical Review B}, author={Duc, Huynh Thanh and Ngo, Cong and Meier, Torsten}, year={2019} }' chicago: Duc, Huynh Thanh, Cong Ngo, and Torsten Meier. “Ballistic Photocurrents in Semiconductor Quantum Wells Caused by the Excitation of Asymmetric Excitons.” Physical Review B 100, no. 4 (2019). https://doi.org/10.1103/physrevb.100.045308. ieee: 'H. T. Duc, C. Ngo, and T. Meier, “Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons,” Physical Review B, vol. 100, no. 4, Art. no. 045308, 2019, doi: 10.1103/physrevb.100.045308.' mla: Duc, Huynh Thanh, et al. “Ballistic Photocurrents in Semiconductor Quantum Wells Caused by the Excitation of Asymmetric Excitons.” Physical Review B, vol. 100, no. 4, 045308, 2019, doi:10.1103/physrevb.100.045308. short: H.T. Duc, C. Ngo, T. Meier, Physical Review B 100 (2019). date_created: 2019-09-18T14:13:07Z date_updated: 2023-04-21T11:27:14Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '35' doi: 10.1103/physrevb.100.045308 intvolume: ' 100' issue: '4' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published status: public title: Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons type: journal_article user_id: '16199' volume: 100 year: '2019' ... --- _id: '13429' author: - first_name: Adriana full_name: Bocchini, Adriana id: '58349' last_name: Bocchini orcid: https://orcid.org/0000-0002-2134-3075 - first_name: Sergej full_name: Neufeld, Sergej id: '23261' last_name: Neufeld - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 citation: ama: 'Bocchini A, Neufeld S, Gerstmann U, Schmidt WG. Oxygen and potassium vacancies in KTP calculated from first principles. Journal of Physics: Condensed Matter. 2019;31:385401. doi:10.1088/1361-648x/ab295c' apa: 'Bocchini, A., Neufeld, S., Gerstmann, U., & Schmidt, W. G. (2019). Oxygen and potassium vacancies in KTP calculated from first principles. Journal of Physics: Condensed Matter, 31, 385401. https://doi.org/10.1088/1361-648x/ab295c' bibtex: '@article{Bocchini_Neufeld_Gerstmann_Schmidt_2019, title={Oxygen and potassium vacancies in KTP calculated from first principles}, volume={31}, DOI={10.1088/1361-648x/ab295c}, journal={Journal of Physics: Condensed Matter}, author={Bocchini, Adriana and Neufeld, Sergej and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2019}, pages={385401} }' chicago: 'Bocchini, Adriana, Sergej Neufeld, Uwe Gerstmann, and Wolf Gero Schmidt. “Oxygen and Potassium Vacancies in KTP Calculated from First Principles.” Journal of Physics: Condensed Matter 31 (2019): 385401. https://doi.org/10.1088/1361-648x/ab295c.' ieee: 'A. Bocchini, S. Neufeld, U. Gerstmann, and W. G. Schmidt, “Oxygen and potassium vacancies in KTP calculated from first principles,” Journal of Physics: Condensed Matter, vol. 31, p. 385401, 2019, doi: 10.1088/1361-648x/ab295c.' mla: 'Bocchini, Adriana, et al. “Oxygen and Potassium Vacancies in KTP Calculated from First Principles.” Journal of Physics: Condensed Matter, vol. 31, 2019, p. 385401, doi:10.1088/1361-648x/ab295c.' short: 'A. Bocchini, S. Neufeld, U. Gerstmann, W.G. Schmidt, Journal of Physics: Condensed Matter 31 (2019) 385401.' date_created: 2019-09-20T12:22:27Z date_updated: 2023-04-21T11:37:48Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '230' - _id: '429' - _id: '35' doi: 10.1088/1361-648x/ab295c intvolume: ' 31' language: - iso: eng main_file_link: - open_access: '1' oa: '1' page: '385401' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '69' name: 'TRR 142 - B4: TRR 142 - Subproject B4' publication: 'Journal of Physics: Condensed Matter' publication_identifier: issn: - 0953-8984 - 1361-648X publication_status: published status: public title: Oxygen and potassium vacancies in KTP calculated from first principles type: journal_article user_id: '171' volume: 31 year: '2019' ...