--- _id: '61279' abstract: - lang: eng text: Spin waves represent an important class of low-energy excitations in magnetic solids, which influence the thermodynamic properties and play a major role in technical applications, such as spintronics or magnetic data storage. Despite the enormous advances of ab initio simulations in materials science, quantitative calculations of spin-wave spectra still pose a significant challenge, because the collective nature of the spin dynamics requires an accurate treatment of the Coulomb interaction between the electrons. As a consequence, simple lattice models like the Heisenberg Hamiltonian are still widespread in practical investigations, but modern techniques like time-dependent density-functional theory or many-body perturbation theory also open a route to material-specific spin-wave calculations from first principles. Although both are in principle exact, actual implementations necessarily employ approximations for electronic exchange and correlation as well as additional numerical simplifications. In this review, we recapitulate the theoretical foundations of ab initio spin-wave calculations and analyze the common approximations that underlie present implementations. In addition, we survey the available results for spin-wave dispersions of various magnetic materials and compare the performance of different computational approaches. In this way, we provide an overview of the present state of the art and identify directions for further developments. article_number: '4431' article_type: review author: - first_name: Michael full_name: Neugum, Michael id: '80813' last_name: Neugum - first_name: Arno full_name: Schindlmayr, Arno id: '458' last_name: Schindlmayr orcid: 0000-0002-4855-071X citation: ama: 'Neugum M, Schindlmayr A. Ab initio calculations of spin waves: A review of theoretical approaches and applications. Materials. 2025;18(18). doi:10.3390/ma18184431' apa: 'Neugum, M., & Schindlmayr, A. (2025). Ab initio calculations of spin waves: A review of theoretical approaches and applications. Materials, 18(18), Article 4431. https://doi.org/10.3390/ma18184431' bibtex: '@article{Neugum_Schindlmayr_2025, title={Ab initio calculations of spin waves: A review of theoretical approaches and applications}, volume={18}, DOI={10.3390/ma18184431}, number={184431}, journal={Materials}, publisher={MDPI}, author={Neugum, Michael and Schindlmayr, Arno}, year={2025} }' chicago: 'Neugum, Michael, and Arno Schindlmayr. “Ab Initio Calculations of Spin Waves: A Review of Theoretical Approaches and Applications.” Materials 18, no. 18 (2025). https://doi.org/10.3390/ma18184431.' ieee: 'M. Neugum and A. Schindlmayr, “Ab initio calculations of spin waves: A review of theoretical approaches and applications,” Materials, vol. 18, no. 18, Art. no. 4431, 2025, doi: 10.3390/ma18184431.' mla: 'Neugum, Michael, and Arno Schindlmayr. “Ab Initio Calculations of Spin Waves: A Review of Theoretical Approaches and Applications.” Materials, vol. 18, no. 18, 4431, MDPI, 2025, doi:10.3390/ma18184431.' short: M. Neugum, A. Schindlmayr, Materials 18 (2025). date_created: 2025-09-15T16:14:59Z date_updated: 2025-10-10T07:31:23Z ddc: - '530' department: - _id: '296' - _id: '15' - _id: '170' - _id: '35' - _id: '230' doi: 10.3390/ma18184431 external_id: isi: - '001580599300001' file: - access_level: open_access content_type: application/pdf creator: schindlm date_created: 2025-09-24T07:19:36Z date_updated: 2025-09-24T07:19:36Z description: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) file_id: '61422' file_name: materials-18-04431.pdf file_size: 611341 relation: main_file title: 'Ab initio calculations of spin waves: A review of theoretical approaches and applications' file_date_updated: 2025-09-24T07:19:36Z has_accepted_license: '1' intvolume: ' 18' isi: '1' issue: '18' language: - iso: eng oa: '1' publication: Materials publication_identifier: eissn: - 1996-1944 publication_status: published publisher: MDPI quality_controlled: '1' status: public title: 'Ab initio calculations of spin waves: A review of theoretical approaches and applications' type: journal_article user_id: '458' volume: 18 year: '2025' ... --- _id: '60959' abstract: - lang: eng text: Miller's rule originated as an empirical relation between the nonlinear and linear optical coefficients of materials. It is now accepted as a useful tool for guiding experiments and computational materials discovery, but its theoretical foundation had long been limited to a derivation for the classical Lorentz model with a weak anharmonic perturbation. Recently, we developed a mathematical framework which enabled us to prove that Miller's rule is equally valid for quantum anharmonic oscillators, despite different dynamics due to zero-point fluctuations and further quantum-mechanical effects. However, our previous derivation applied only to one-dimensional oscillators and to the special case of second- and third-harmonic generation in a monochromatic electric field. Here we extend the proof to three-dimensional quantum anharmonic oscillators and also treat all orders of the nonlinear response to an arbitrary multi-frequency field. This makes the results applicable to a much larger range of physical systems and nonlinear optical processes. The obtained generalized Miller formulae rigorously express all tensor elements of the frequency-dependent nonlinear susceptibilities in terms of the linear susceptibility and thus allow a computationally inexpensive quantitative prediction of arbitrary parametric frequency-mixing processes from a small initial dataset. article_number: '34' article_type: original author: - first_name: Maximilian Tim full_name: Meyer, Maximilian Tim id: '77895' last_name: Meyer orcid: 0009-0003-4899-0920 - first_name: Arno full_name: Schindlmayr, Arno id: '458' last_name: Schindlmayr orcid: 0000-0002-4855-071X citation: ama: Meyer MT, Schindlmayr A. Generalized Miller formulae for quantum anharmonic oscillators. Dynamics. 2025;5(3). doi:10.3390/dynamics5030034 apa: Meyer, M. T., & Schindlmayr, A. (2025). Generalized Miller formulae for quantum anharmonic oscillators. Dynamics, 5(3), Article 34. https://doi.org/10.3390/dynamics5030034 bibtex: '@article{Meyer_Schindlmayr_2025, title={Generalized Miller formulae for quantum anharmonic oscillators}, volume={5}, DOI={10.3390/dynamics5030034}, number={334}, journal={Dynamics}, publisher={MDPI}, author={Meyer, Maximilian Tim and Schindlmayr, Arno}, year={2025} }' chicago: Meyer, Maximilian Tim, and Arno Schindlmayr. “Generalized Miller Formulae for Quantum Anharmonic Oscillators.” Dynamics 5, no. 3 (2025). https://doi.org/10.3390/dynamics5030034. ieee: 'M. T. Meyer and A. Schindlmayr, “Generalized Miller formulae for quantum anharmonic oscillators,” Dynamics, vol. 5, no. 3, Art. no. 34, 2025, doi: 10.3390/dynamics5030034.' mla: Meyer, Maximilian Tim, and Arno Schindlmayr. “Generalized Miller Formulae for Quantum Anharmonic Oscillators.” Dynamics, vol. 5, no. 3, 34, MDPI, 2025, doi:10.3390/dynamics5030034. short: M.T. Meyer, A. Schindlmayr, Dynamics 5 (2025). date_created: 2025-08-20T09:46:13Z date_updated: 2025-10-10T07:29:36Z ddc: - '530' department: - _id: '296' - _id: '230' - _id: '15' - _id: '170' - _id: '35' doi: 10.3390/dynamics5030034 external_id: isi: - '001581270200001' file: - access_level: open_access content_type: application/pdf creator: schindlm date_created: 2025-08-28T12:23:26Z date_updated: 2025-08-28T12:27:05Z description: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) file_id: '61056' file_name: dynamics-05-00034.pdf file_size: 375897 relation: main_file title: Generalized Miller formulae for quantum anharmonic oscillators file_date_updated: 2025-08-28T12:27:05Z has_accepted_license: '1' intvolume: ' 5' isi: '1' issue: '3' language: - iso: eng oa: '1' publication: Dynamics publication_identifier: eissn: - 2673-8716 publication_status: published publisher: MDPI quality_controlled: '1' status: public title: Generalized Miller formulae for quantum anharmonic oscillators type: journal_article user_id: '458' volume: 5 year: '2025' ... --- _id: '62286' abstract: - lang: eng text: Optical tweezer arrays of laser-cooled and individually controlled particles have revolutionized atomic, molecular, and optical physics. They afford exquisite capabilities for applications in quantum simulation of many-body physics, quantum computation, and sensing. Underlying this development is the technical maturity of generating scalable optical beams, enabled by active components and a high numerical aperture objective. However, such a complex combination of bulk optics outside the vacuum chamber is very sensitive to any vibration and drift. Here, we demonstrate the generation of a 3 × 3 static tweezer array with a single chip-scale multifunctional metasurface element in vacuum, replacing the meter-long free space optics. Fluorescence counts on the camera validate the successful trapping of the atomic ensemble array and showcase a promising strategy for integrated photonics with cold atom systems. The introduction of a polarization independent dual-wavelength metasurface significantly enhances fluorescence collection efficiency while reducing experimental complexity. This approach paves the way for scalable neutral atom platforms and offers a compelling route towards the realization of next generation quantum metasurfaces. article_number: '51085' article_type: original author: - first_name: Donghao full_name: Li, Donghao last_name: Li - first_name: Qiming full_name: Liao, Qiming last_name: Liao - first_name: Beining full_name: Xu, Beining last_name: Xu - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Emmanuel full_name: Narvaez Castaneda, Emmanuel last_name: Narvaez Castaneda - first_name: Yaoting full_name: Zhou, Yaoting last_name: Zhou - first_name: Keyu full_name: Qin, Keyu last_name: Qin - first_name: Zhongxiao full_name: Xu, Zhongxiao last_name: Xu - first_name: Heng full_name: Shen, Heng last_name: Shen - first_name: Lingling full_name: Huang, Lingling last_name: Huang citation: ama: Li D, Liao Q, Xu B, et al. In vacuum metasurface for optical microtrap array. Optics Express. 2025;33(24). doi:10.1364/oe.580201 apa: Li, D., Liao, Q., Xu, B., Zentgraf, T., Narvaez Castaneda, E., Zhou, Y., Qin, K., Xu, Z., Shen, H., & Huang, L. (2025). In vacuum metasurface for optical microtrap array. Optics Express, 33(24), Article 51085. https://doi.org/10.1364/oe.580201 bibtex: '@article{Li_Liao_Xu_Zentgraf_Narvaez Castaneda_Zhou_Qin_Xu_Shen_Huang_2025, title={In vacuum metasurface for optical microtrap array}, volume={33}, DOI={10.1364/oe.580201}, number={2451085}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Li, Donghao and Liao, Qiming and Xu, Beining and Zentgraf, Thomas and Narvaez Castaneda, Emmanuel and Zhou, Yaoting and Qin, Keyu and Xu, Zhongxiao and Shen, Heng and Huang, Lingling}, year={2025} }' chicago: Li, Donghao, Qiming Liao, Beining Xu, Thomas Zentgraf, Emmanuel Narvaez Castaneda, Yaoting Zhou, Keyu Qin, Zhongxiao Xu, Heng Shen, and Lingling Huang. “In Vacuum Metasurface for Optical Microtrap Array.” Optics Express 33, no. 24 (2025). https://doi.org/10.1364/oe.580201. ieee: 'D. Li et al., “In vacuum metasurface for optical microtrap array,” Optics Express, vol. 33, no. 24, Art. no. 51085, 2025, doi: 10.1364/oe.580201.' mla: Li, Donghao, et al. “In Vacuum Metasurface for Optical Microtrap Array.” Optics Express, vol. 33, no. 24, 51085, Optica Publishing Group, 2025, doi:10.1364/oe.580201. short: D. Li, Q. Liao, B. Xu, T. Zentgraf, E. Narvaez Castaneda, Y. Zhou, K. Qin, Z. Xu, H. Shen, L. Huang, Optics Express 33 (2025). date_created: 2025-11-24T06:31:17Z date_updated: 2025-11-24T06:35:19Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1364/oe.580201 intvolume: ' 33' issue: '24' language: - iso: eng main_file_link: - open_access: '1' url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-24-51085 oa: '1' publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published publisher: Optica Publishing Group quality_controlled: '1' status: public title: In vacuum metasurface for optical microtrap array type: journal_article user_id: '30525' volume: 33 year: '2025' ... --- _id: '62639' author: - first_name: Stephan full_name: Kruse, Stephan id: '38254' last_name: Kruse - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Tobias full_name: Schwabe, Tobias id: '39217' last_name: Schwabe citation: ama: Kruse S, Silberhorn C, Brecht B, Schwabe T. Optisch basierter Digital-Analog-Umsetzer. Published online 2025. apa: Kruse, S., Silberhorn, C., Brecht, B., & Schwabe, T. (2025). Optisch basierter Digital-Analog-Umsetzer. bibtex: '@article{Kruse_Silberhorn_Brecht_Schwabe_2025, title={Optisch basierter Digital-Analog-Umsetzer}, author={Kruse, Stephan and Silberhorn, Christine and Brecht, Benjamin and Schwabe, Tobias}, year={2025} }' chicago: Kruse, Stephan, Christine Silberhorn, Benjamin Brecht, and Tobias Schwabe. “Optisch Basierter Digital-Analog-Umsetzer,” 2025. ieee: S. Kruse, C. Silberhorn, B. Brecht, and T. Schwabe, “Optisch basierter Digital-Analog-Umsetzer.” 2025. mla: Kruse, Stephan, et al. Optisch Basierter Digital-Analog-Umsetzer. 2025. short: S. Kruse, C. Silberhorn, B. Brecht, T. Schwabe, (2025). date_created: 2025-11-27T07:00:50Z date_updated: 2025-11-27T07:07:16Z department: - _id: '58' - _id: '623' - _id: '288' ipc: H03M 1/66 ipn: DE102023212604B3 publication_date: 2025-01-23 status: public title: Optisch basierter Digital-Analog-Umsetzer type: patent user_id: '38254' year: '2025' ... --- _id: '62714' abstract: - lang: ger text: "Die fortschreitende Digitalisierung bringt große Herausforderungen für die Aus- und Weiterbildung\r\nvon Lehrkräften mit sich. Während angehende Lehrkräfte bereits von neuen Entwicklungen in der\r\nAusbildung profitieren, sind viele aktive Lehrkräfte bislang nicht ausreichend auf die digitalen Möglichkeiten\r\nim Unterricht vorbereitet. Der Kompetenzverbund lernen:digital setzt genau hier an und\r\nunterstützt gezielt Lehrkräfte beim Erwerb digitalisierungsbezogener Kompetenzen. Im Rahmen des\r\nVerbundprojekts ComeMINT wurde unter anderem ein Online-Selbstlernkurs entwickelt, der sich\r\nmit dem Einsatz digitaler Medien im Physikunterricht befasst. Grundlage des Kurses bilden zum\r\neinen eine Bedürfnisanalyse unter praktizierenden Physiklehrkräften und zum anderen bereits bestehende\r\nMaterialien aus der Lehrkräfteausbildung. Der Kurs vermittelt grundlegende Kompetenzen\r\nim Umgang mit physikspezifischen digitalen Medien, wie zum Beispiel digitaler Messwerterfassung,\r\nAugmented Reality oder Simulationen. In diesem Beitrag werden die Entwicklung und die\r\nInhalte des Selbstlernkurses skizziert, sowie die nachhaltige Aufbereitung der Materialien zur Nachnutzung\r\ndargestellt." author: - first_name: David Christoph full_name: Weiler, David Christoph id: '118219' last_name: Weiler orcid: 0000-0003-2164-0341 - first_name: Jan-Philipp full_name: Burde, Jan-Philipp last_name: Burde - first_name: Kasim full_name: Costan, Kasim last_name: Costan - first_name: Rike Isabel full_name: Gieshoff, Rike Isabel id: '99511' last_name: Gieshoff orcid: 0000-0001-8713-3014 - first_name: Christoph full_name: Kulgemeyer, Christoph id: '84533' last_name: Kulgemeyer - first_name: Armin full_name: Lässer, Armin last_name: Lässer - first_name: Katja full_name: Plicht, Katja id: '111352' last_name: Plicht - first_name: Josef full_name: Riese, Josef id: '429' last_name: Riese orcid: 0000-0003-2927-2619 - first_name: Thomas full_name: Schubatzky, Thomas last_name: Schubatzky citation: ama: 'Weiler DC, Burde J-P, Costan K, et al. Online-Selbstlernkurs zu digitalen Medien im Physikunterricht. In: PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung. Didaktik der Physik – Beiträge zur DPG-Frühjahrstagung(PhyDid B). ; 2025:71-78.' apa: Weiler, D. C., Burde, J.-P., Costan, K., Gieshoff, R. I., Kulgemeyer, C., Lässer, A., Plicht, K., Riese, J., & Schubatzky, T. (2025). Online-Selbstlernkurs zu digitalen Medien im Physikunterricht. PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung, 71–78. bibtex: '@inproceedings{Weiler_Burde_Costan_Gieshoff_Kulgemeyer_Lässer_Plicht_Riese_Schubatzky_2025, series={Didaktik der Physik – Beiträge zur DPG-Frühjahrstagung(PhyDid B)}, title={Online-Selbstlernkurs zu digitalen Medien im Physikunterricht}, booktitle={PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung}, author={Weiler, David Christoph and Burde, Jan-Philipp and Costan, Kasim and Gieshoff, Rike Isabel and Kulgemeyer, Christoph and Lässer, Armin and Plicht, Katja and Riese, Josef and Schubatzky, Thomas}, year={2025}, pages={71–78}, collection={Didaktik der Physik – Beiträge zur DPG-Frühjahrstagung(PhyDid B)} }' chicago: Weiler, David Christoph, Jan-Philipp Burde, Kasim Costan, Rike Isabel Gieshoff, Christoph Kulgemeyer, Armin Lässer, Katja Plicht, Josef Riese, and Thomas Schubatzky. “Online-Selbstlernkurs zu digitalen Medien im Physikunterricht.” In PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung, 71–78. Didaktik der Physik – Beiträge zur DPG-Frühjahrstagung(PhyDid B), 2025. ieee: D. C. Weiler et al., “Online-Selbstlernkurs zu digitalen Medien im Physikunterricht,” in PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung, Göttingen, 2025, pp. 71–78. mla: Weiler, David Christoph, et al. “Online-Selbstlernkurs zu digitalen Medien im Physikunterricht.” PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung, 2025, pp. 71–78. short: 'D.C. Weiler, J.-P. Burde, K. Costan, R.I. Gieshoff, C. Kulgemeyer, A. Lässer, K. Plicht, J. Riese, T. Schubatzky, in: PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung, 2025, pp. 71–78.' conference: end_date: 02.04.2025 location: Göttingen name: DPG-Frühjahrstagung 2025 start_date: 31.03.2025 date_created: 2025-12-01T09:44:49Z date_updated: 2025-12-01T09:45:35Z ddc: - '370' department: - _id: '864' file: - access_level: closed content_type: application/pdf creator: dweiler date_created: 2025-12-01T09:41:08Z date_updated: 2025-12-01T09:41:08Z file_id: '62715' file_name: 11_1492_Online-Selbstlernkurs+zu+digitalen+Medien+im+Physikunterricht.pdf file_size: 862011 relation: main_file success: 1 file_date_updated: 2025-12-01T09:41:08Z has_accepted_license: '1' language: - iso: ger main_file_link: - open_access: '1' url: https://ojs.dpg-physik.de/index.php/phydid-b/article/view/1492/1731 oa: '1' page: 71-78 publication: PhyDid B - Didaktik Der Physik - Beiträge Zur DPG-Frühjahrstagung publication_identifier: unknown: - 2191-379X publication_status: published series_title: Didaktik der Physik – Beiträge zur DPG-Frühjahrstagung(PhyDid B) status: public title: Online-Selbstlernkurs zu digitalen Medien im Physikunterricht type: conference user_id: '118219' year: '2025' ... --- _id: '62749' abstract: - lang: eng text: "Coherent Raman scattering techniques as coherent anti-Stokes Raman scattering (CARS), offer significant advantages in terms of pixel dwell times and speed as compared to spontaneous Raman scattering for investigations of crystalline materials. However, the spectral information in CARS is often hampered by the presence of a nonresonant contribution to the scattering process that shifts and distorts the Raman peaks. In this work, we apply a method to obtain nonresonant background-free spectra based on time-delayed, broadband CARS (TD-BCARS) using an intrapulse excitation scheme. In particular, this method can measure the phononic dephasing times across the full phonon spectrum at once. We test the methodology on amorphous SiO2 (glass), which is used to characterize the setup-specific and material-independent response times, and then apply TD-BCARS to the analysis of single crystals of diamond and ferroelectrics of potassium titanyl phosphate (KTP) and potassium titanyl arsenate (KTA). For diamond, we determine a dephasing time of \U0001D70F=7.81 ps for the single \U0001D460⁢\U0001D45D3 peak." article_number: '224106' article_type: original author: - first_name: F. full_name: Hempel, F. last_name: Hempel - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: F. full_name: Vernuccio, F. last_name: Vernuccio - first_name: K. J. full_name: Spychala, K. J. last_name: Spychala - first_name: R. full_name: Buschbeck, R. last_name: Buschbeck - first_name: G. full_name: Cerullo, G. last_name: Cerullo - first_name: D. full_name: Polli, D. last_name: Polli - first_name: L. M. full_name: Eng, L. M. last_name: Eng citation: ama: Hempel F, Rüsing M, Vernuccio F, et al. Phonon dephasing times determined with time-delayed broadband coherent anti-Stokes Raman scattering. Physical Review B. 2025;112(22). doi:10.1103/1ctr-csjy apa: Hempel, F., Rüsing, M., Vernuccio, F., Spychala, K. J., Buschbeck, R., Cerullo, G., Polli, D., & Eng, L. M. (2025). Phonon dephasing times determined with time-delayed broadband coherent anti-Stokes Raman scattering. Physical Review B, 112(22), Article 224106. https://doi.org/10.1103/1ctr-csjy bibtex: '@article{Hempel_Rüsing_Vernuccio_Spychala_Buschbeck_Cerullo_Polli_Eng_2025, title={Phonon dephasing times determined with time-delayed broadband coherent anti-Stokes Raman scattering}, volume={112}, DOI={10.1103/1ctr-csjy}, number={22224106}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Hempel, F. and Rüsing, Michael and Vernuccio, F. and Spychala, K. J. and Buschbeck, R. and Cerullo, G. and Polli, D. and Eng, L. M.}, year={2025} }' chicago: Hempel, F., Michael Rüsing, F. Vernuccio, K. J. Spychala, R. Buschbeck, G. Cerullo, D. Polli, and L. M. Eng. “Phonon Dephasing Times Determined with Time-Delayed Broadband Coherent Anti-Stokes Raman Scattering.” Physical Review B 112, no. 22 (2025). https://doi.org/10.1103/1ctr-csjy. ieee: 'F. Hempel et al., “Phonon dephasing times determined with time-delayed broadband coherent anti-Stokes Raman scattering,” Physical Review B, vol. 112, no. 22, Art. no. 224106, 2025, doi: 10.1103/1ctr-csjy.' mla: Hempel, F., et al. “Phonon Dephasing Times Determined with Time-Delayed Broadband Coherent Anti-Stokes Raman Scattering.” Physical Review B, vol. 112, no. 22, 224106, American Physical Society (APS), 2025, doi:10.1103/1ctr-csjy. short: F. Hempel, M. Rüsing, F. Vernuccio, K.J. Spychala, R. Buschbeck, G. Cerullo, D. Polli, L.M. Eng, Physical Review B 112 (2025). date_created: 2025-12-02T19:21:33Z date_updated: 2025-12-02T19:23:55Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1103/1ctr-csjy external_id: arxiv: - '2506.05519' intvolume: ' 112' issue: '22' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2506.05519 oa: '1' publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published publisher: American Physical Society (APS) quality_controlled: '1' status: public title: Phonon dephasing times determined with time-delayed broadband coherent anti-Stokes Raman scattering type: journal_article user_id: '22501' volume: 112 year: '2025' ... --- _id: '62867' abstract: - lang: eng text: "ABSTRACT\r\n Effective manipulation of photonic spin–orbit coupling (SOC) in microcavities is of fundamental importance within topological photonics and applications. Anisotropic organic single‐crystalline materials can induce abundant SOC phenomenon due to their flexible tunability of molecular geometries, however, the intrinsic relationship between molecular geometries/orientations in 3D space and photonic SOC is lacking. In this study, we design two kinds of 2D organic polymorphs for the construction of organic microcavities to investigate the structure‐performance relationships. In two polymorphic microcavities, two distinctive photonic SOC phenomena are observed regardless of the in‐plane anisotropy of organic polymorphs. Theoretical analysis indicates that the photonic SOC strength is strongly influenced by the synergies between the crystal anisotropy and the tilted collective molecular transition dipole moment. Our results uncover the correlation mechanism between the structure of molecules and photonic SOC and open an avenue to engineer complex photonic SOC by use of organic microstructures towards the development of diverse integrated photonic devices." article_number: e01874 author: - first_name: Ying full_name: Ji, Ying last_name: Ji - first_name: Xuekai full_name: Ma, Xuekai id: '59416' last_name: Ma - first_name: Han full_name: Huang, Han last_name: Huang - first_name: Yibo full_name: Deng, Yibo last_name: Deng - first_name: Pingyang full_name: Wang, Pingyang last_name: Wang - first_name: Teng full_name: Long, Teng last_name: Long - first_name: Yuan full_name: Li, Yuan last_name: Li - first_name: Ruiyang full_name: Zhao, Ruiyang last_name: Zhao - first_name: Yunfei full_name: Li, Yunfei last_name: Li - first_name: Cunbin full_name: An, Cunbin last_name: An - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Chunling full_name: Gu, Chunling last_name: Gu - first_name: Bo full_name: Liao, Bo last_name: Liao - first_name: Hongbing full_name: Fu, Hongbing last_name: Fu - first_name: Qing full_name: Liao, Qing last_name: Liao citation: ama: Ji Y, Ma X, Huang H, et al. Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals. Laser &amp; Photonics Reviews. Published online 2025. doi:10.1002/lpor.202501874 apa: Ji, Y., Ma, X., Huang, H., Deng, Y., Wang, P., Long, T., Li, Y., Zhao, R., Li, Y., An, C., Schumacher, S., Gu, C., Liao, B., Fu, H., & Liao, Q. (2025). Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals. Laser &amp; Photonics Reviews, Article e01874. https://doi.org/10.1002/lpor.202501874 bibtex: '@article{Ji_Ma_Huang_Deng_Wang_Long_Li_Zhao_Li_An_et al._2025, title={Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals}, DOI={10.1002/lpor.202501874}, number={e01874}, journal={Laser &amp; Photonics Reviews}, publisher={Wiley}, author={Ji, Ying and Ma, Xuekai and Huang, Han and Deng, Yibo and Wang, Pingyang and Long, Teng and Li, Yuan and Zhao, Ruiyang and Li, Yunfei and An, Cunbin and et al.}, year={2025} }' chicago: Ji, Ying, Xuekai Ma, Han Huang, Yibo Deng, Pingyang Wang, Teng Long, Yuan Li, et al. “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals.” Laser &amp; Photonics Reviews, 2025. https://doi.org/10.1002/lpor.202501874. ieee: 'Y. Ji et al., “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals,” Laser &amp; Photonics Reviews, Art. no. e01874, 2025, doi: 10.1002/lpor.202501874.' mla: Ji, Ying, et al. “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals.” Laser &amp; Photonics Reviews, e01874, Wiley, 2025, doi:10.1002/lpor.202501874. short: Y. Ji, X. Ma, H. Huang, Y. Deng, P. Wang, T. Long, Y. Li, R. Zhao, Y. Li, C. An, S. Schumacher, C. Gu, B. Liao, H. Fu, Q. Liao, Laser &amp; Photonics Reviews (2025). date_created: 2025-12-04T12:33:48Z date_updated: 2025-12-04T12:34:45Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '705' - _id: '35' - _id: '230' doi: 10.1002/lpor.202501874 language: - iso: eng publication: Laser & Photonics Reviews publication_identifier: issn: - 1863-8880 - 1863-8899 publication_status: published publisher: Wiley status: public title: Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals type: journal_article user_id: '16199' year: '2025' ... --- _id: '62862' abstract: - lang: eng text: Exciton polariton condensates are macroscopic coherent states in which topological excitations can be observed. In this work, we observe the excitation of the vortices and realize tuning the topological charge by manipulating the pumping configurations. Using a digital micromirror device, we constructed an annular pumping pattern where the inner and outer rings can be easily tuned. Both the number and the topological charge of the vortices can be changed by slightly tuning the inner ring position against the outer ring. The experimental results can be reproduced in theory by the Gross–Pitaevskii equation. Our work offers to generate and manipulate vortices in exciton polariton condensates using a straightforward optical method. article_number: '121103' author: - first_name: Qiang full_name: Ai, Qiang last_name: Ai - first_name: Xuekai full_name: Ma, Xuekai id: '59416' last_name: Ma - first_name: Franziska full_name: Barkhausen, Franziska id: '63631' last_name: Barkhausen - first_name: Xiaokun full_name: Zhai, Xiaokun last_name: Zhai - first_name: Chunzi full_name: Xing, Chunzi last_name: Xing - first_name: Xinmiao full_name: Yang, Xinmiao last_name: Yang - first_name: Peilin full_name: Wang, Peilin last_name: Wang - first_name: Tianyu full_name: Liu, Tianyu last_name: Liu - first_name: Yong full_name: Zhang, Yong last_name: Zhang - first_name: Yazhou full_name: Gu, Yazhou last_name: Gu - first_name: Peigang full_name: Li, Peigang last_name: Li - first_name: Zhitong full_name: Li, Zhitong last_name: Li - first_name: Zacharias full_name: Hatzopoulos, Zacharias last_name: Hatzopoulos - first_name: Pavlos G. full_name: Savvidis, Pavlos G. last_name: Savvidis - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Tingge full_name: Gao, Tingge last_name: Gao citation: ama: Ai Q, Ma X, Barkhausen F, et al. Tuning polariton vortices in an asymmetric ring potential. Applied Physics Letters. 2025;127(12). doi:10.1063/5.0287076 apa: Ai, Q., Ma, X., Barkhausen, F., Zhai, X., Xing, C., Yang, X., Wang, P., Liu, T., Zhang, Y., Gu, Y., Li, P., Li, Z., Hatzopoulos, Z., Savvidis, P. G., Schumacher, S., & Gao, T. (2025). Tuning polariton vortices in an asymmetric ring potential. Applied Physics Letters, 127(12), Article 121103. https://doi.org/10.1063/5.0287076 bibtex: '@article{Ai_Ma_Barkhausen_Zhai_Xing_Yang_Wang_Liu_Zhang_Gu_et al._2025, title={Tuning polariton vortices in an asymmetric ring potential}, volume={127}, DOI={10.1063/5.0287076}, number={12121103}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Ai, Qiang and Ma, Xuekai and Barkhausen, Franziska and Zhai, Xiaokun and Xing, Chunzi and Yang, Xinmiao and Wang, Peilin and Liu, Tianyu and Zhang, Yong and Gu, Yazhou and et al.}, year={2025} }' chicago: Ai, Qiang, Xuekai Ma, Franziska Barkhausen, Xiaokun Zhai, Chunzi Xing, Xinmiao Yang, Peilin Wang, et al. “Tuning Polariton Vortices in an Asymmetric Ring Potential.” Applied Physics Letters 127, no. 12 (2025). https://doi.org/10.1063/5.0287076. ieee: 'Q. Ai et al., “Tuning polariton vortices in an asymmetric ring potential,” Applied Physics Letters, vol. 127, no. 12, Art. no. 121103, 2025, doi: 10.1063/5.0287076.' mla: Ai, Qiang, et al. “Tuning Polariton Vortices in an Asymmetric Ring Potential.” Applied Physics Letters, vol. 127, no. 12, 121103, AIP Publishing, 2025, doi:10.1063/5.0287076. short: Q. Ai, X. Ma, F. Barkhausen, X. Zhai, C. Xing, X. Yang, P. Wang, T. Liu, Y. Zhang, Y. Gu, P. Li, Z. Li, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, T. Gao, Applied Physics Letters 127 (2025). date_created: 2025-12-04T12:25:12Z date_updated: 2025-12-04T12:27:02Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '705' - _id: '35' - _id: '230' - _id: '27' doi: 10.1063/5.0287076 intvolume: ' 127' issue: '12' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Applied Physics Letters publication_identifier: issn: - 0003-6951 - 1077-3118 publication_status: published publisher: AIP Publishing status: public title: Tuning polariton vortices in an asymmetric ring potential type: journal_article user_id: '16199' volume: 127 year: '2025' ... --- _id: '62865' article_number: '115305' author: - first_name: Jinming full_name: Sun, Jinming last_name: Sun - first_name: Manna full_name: Chen, Manna last_name: Chen - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Wei full_name: Hu, Wei last_name: Hu - first_name: Xuekai full_name: Ma, Xuekai id: '59416' last_name: Ma citation: ama: Sun J, Chen M, Schumacher S, Hu W, Ma X. Higher-order dark solitons and control dynamics in microcavity polariton condensates. Physical Review B. 2025;112(11). doi:10.1103/p357-vyq8 apa: Sun, J., Chen, M., Schumacher, S., Hu, W., & Ma, X. (2025). Higher-order dark solitons and control dynamics in microcavity polariton condensates. Physical Review B, 112(11), Article 115305. https://doi.org/10.1103/p357-vyq8 bibtex: '@article{Sun_Chen_Schumacher_Hu_Ma_2025, title={Higher-order dark solitons and control dynamics in microcavity polariton condensates}, volume={112}, DOI={10.1103/p357-vyq8}, number={11115305}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Sun, Jinming and Chen, Manna and Schumacher, Stefan and Hu, Wei and Ma, Xuekai}, year={2025} }' chicago: Sun, Jinming, Manna Chen, Stefan Schumacher, Wei Hu, and Xuekai Ma. “Higher-Order Dark Solitons and Control Dynamics in Microcavity Polariton Condensates.” Physical Review B 112, no. 11 (2025). https://doi.org/10.1103/p357-vyq8. ieee: 'J. Sun, M. Chen, S. Schumacher, W. Hu, and X. Ma, “Higher-order dark solitons and control dynamics in microcavity polariton condensates,” Physical Review B, vol. 112, no. 11, Art. no. 115305, 2025, doi: 10.1103/p357-vyq8.' mla: Sun, Jinming, et al. “Higher-Order Dark Solitons and Control Dynamics in Microcavity Polariton Condensates.” Physical Review B, vol. 112, no. 11, 115305, American Physical Society (APS), 2025, doi:10.1103/p357-vyq8. short: J. Sun, M. Chen, S. Schumacher, W. Hu, X. Ma, Physical Review B 112 (2025). date_created: 2025-12-04T12:28:52Z date_updated: 2025-12-04T12:29:37Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '705' - _id: '35' - _id: '230' doi: 10.1103/p357-vyq8 intvolume: ' 112' issue: '11' language: - iso: eng publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published publisher: American Physical Society (APS) status: public title: Higher-order dark solitons and control dynamics in microcavity polariton condensates type: journal_article user_id: '16199' volume: 112 year: '2025' ... --- _id: '62860' abstract: - lang: eng text: "\r\n The Quantum Internet, a network of quantum-enabled infrastructure, represents the next frontier in telecommunications, promising capabilities that cannot be attained by classical counterparts. A crucial step in realizing such large-scale quantum networks is the integration of entanglement distribution within existing telecommunication infrastructure. Here, we demonstrate a real-world scalable quantum networking testbed deployed within Deutsche Telekom’s metropolitan fibers in Berlin. Using commercially available quantum devices and standard add-drop multiplexing hardware, we distributed polarization-entangled photon pairs over dynamically selectable looped fiber paths ranging from 10 m to 60 km and showed entanglement distribution over up to approximately 100 km. Quantum signals, transmitted at 1324 nm (O-band), coexist with conventional bidirectional C-band traffic without dedicated fibers or infrastructure changes. Active stabilization of the polarization enables robust long-term performance, achieving entanglement Bell-state fidelity bounds between 85% and 99% and Clauser–Horne–Shimony–Holt parameter\r\n S\r\n -values between 2.36 and 2.74 during continuous multiday operation. By achieving a high-fidelity entanglement distribution with less than 1.5% downtime, we confirm the feasibility of hybrid quantum-classical networks under real-world conditions at the metropolitan scale. These results establish deployment benchmarks and provide a practical roadmap for telecom operators to integrate quantum capabilities.\r\n " article_number: '1072' author: - first_name: Matheus full_name: Sena, Matheus last_name: Sena - first_name: Mael full_name: Flament, Mael last_name: Flament - first_name: Shane full_name: Andrewski, Shane last_name: Andrewski - first_name: Ioannis full_name: Caltzidis, Ioannis last_name: Caltzidis - first_name: Niccolò full_name: Bigagli, Niccolò last_name: Bigagli - first_name: Thomas full_name: Rieser, Thomas last_name: Rieser - first_name: Gabriel full_name: Bello Portmann, Gabriel last_name: Bello Portmann - first_name: Rourke full_name: Sekelsky, Rourke last_name: Sekelsky - first_name: Ralf-Peter full_name: Braun, Ralf-Peter last_name: Braun - first_name: Alexander N. full_name: Craddock, Alexander N. last_name: Craddock - first_name: Maximilian full_name: Schulz, Maximilian last_name: Schulz - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Michaela full_name: Ritter, Michaela last_name: Ritter - first_name: Marc full_name: Geitz, Marc last_name: Geitz - first_name: Oliver full_name: Holschke, Oliver last_name: Holschke - first_name: Mehdi full_name: Namazi, Mehdi last_name: Namazi citation: ama: Sena M, Flament M, Andrewski S, et al. High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic. Journal of Optical Communications and Networking. 2025;17(12). doi:10.1364/jocn.575396 apa: Sena, M., Flament, M., Andrewski, S., Caltzidis, I., Bigagli, N., Rieser, T., Bello Portmann, G., Sekelsky, R., Braun, R.-P., Craddock, A. N., Schulz, M., Jöns, K., Ritter, M., Geitz, M., Holschke, O., & Namazi, M. (2025). High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic. Journal of Optical Communications and Networking, 17(12), Article 1072. https://doi.org/10.1364/jocn.575396 bibtex: '@article{Sena_Flament_Andrewski_Caltzidis_Bigagli_Rieser_Bello Portmann_Sekelsky_Braun_Craddock_et al._2025, title={High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic}, volume={17}, DOI={10.1364/jocn.575396}, number={121072}, journal={Journal of Optical Communications and Networking}, publisher={Optica Publishing Group}, author={Sena, Matheus and Flament, Mael and Andrewski, Shane and Caltzidis, Ioannis and Bigagli, Niccolò and Rieser, Thomas and Bello Portmann, Gabriel and Sekelsky, Rourke and Braun, Ralf-Peter and Craddock, Alexander N. and et al.}, year={2025} }' chicago: Sena, Matheus, Mael Flament, Shane Andrewski, Ioannis Caltzidis, Niccolò Bigagli, Thomas Rieser, Gabriel Bello Portmann, et al. “High-Fidelity Quantum Entanglement Distribution in Metropolitan Fiber Networks with Co-Propagating Classical Traffic.” Journal of Optical Communications and Networking 17, no. 12 (2025). https://doi.org/10.1364/jocn.575396. ieee: 'M. Sena et al., “High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic,” Journal of Optical Communications and Networking, vol. 17, no. 12, Art. no. 1072, 2025, doi: 10.1364/jocn.575396.' mla: Sena, Matheus, et al. “High-Fidelity Quantum Entanglement Distribution in Metropolitan Fiber Networks with Co-Propagating Classical Traffic.” Journal of Optical Communications and Networking, vol. 17, no. 12, 1072, Optica Publishing Group, 2025, doi:10.1364/jocn.575396. short: M. Sena, M. Flament, S. Andrewski, I. Caltzidis, N. Bigagli, T. Rieser, G. Bello Portmann, R. Sekelsky, R.-P. Braun, A.N. Craddock, M. Schulz, K. Jöns, M. Ritter, M. Geitz, O. Holschke, M. Namazi, Journal of Optical Communications and Networking 17 (2025). date_created: 2025-12-04T12:20:01Z date_updated: 2025-12-04T13:37:02Z department: - _id: '623' - _id: '15' doi: 10.1364/jocn.575396 intvolume: ' 17' issue: '12' language: - iso: eng publication: Journal of Optical Communications and Networking publication_identifier: issn: - 1943-0620 - 1943-0639 publication_status: published publisher: Optica Publishing Group status: public title: High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic type: journal_article user_id: '85353' volume: 17 year: '2025' ... --- _id: '62912' abstract: - lang: eng text: We investigate the dynamics of wave packets in a parabolic optical lattice formed by combining an optical lattice with a global parabolic trap. Our study examines the phase space representation of the system's eigenstates by comparing them to the classical phase space of a pendulum, to which the system effectively maps. The analysis reveals that quantum states can exhibit mixed dynamics by straddling the separatrix. A key finding is that the dynamics around the separatrix enables the controlled creation of highly nonclassical states, distinguishing them from the classical oscillatory or rotational dynamics of the pendulum. By considering a finite momentum of the initial wave packet, we demonstrate various dynamical regimes. Furthermore, a slight energy mismatch between nearly degenerate states localized at opposite turning points of the trap potential results in controlled long-range dynamical tunneling. These results can be interpreted as quantum beating between a clockwise rotating and a counterclockwise rotating pendulum. article_number: '013141' author: - first_name: Usman full_name: Ali, Usman last_name: Ali - first_name: Martin full_name: Holthaus, Martin last_name: Holthaus - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: 'Ali U, Holthaus M, Meier T. Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling. Physical Review Research. 2025;7(1). doi:10.1103/physrevresearch.7.013141' apa: 'Ali, U., Holthaus, M., & Meier, T. (2025). Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling. Physical Review Research, 7(1), Article 013141. https://doi.org/10.1103/physrevresearch.7.013141' bibtex: '@article{Ali_Holthaus_Meier_2025, title={Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling}, volume={7}, DOI={10.1103/physrevresearch.7.013141}, number={1013141}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Ali, Usman and Holthaus, Martin and Meier, Torsten}, year={2025} }' chicago: 'Ali, Usman, Martin Holthaus, and Torsten Meier. “Wave Packet Dynamics in Parabolic Optical Lattices: From Bloch Oscillations to Long-Range Dynamical Tunneling.” Physical Review Research 7, no. 1 (2025). https://doi.org/10.1103/physrevresearch.7.013141.' ieee: 'U. Ali, M. Holthaus, and T. Meier, “Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling,” Physical Review Research, vol. 7, no. 1, Art. no. 013141, 2025, doi: 10.1103/physrevresearch.7.013141.' mla: 'Ali, Usman, et al. “Wave Packet Dynamics in Parabolic Optical Lattices: From Bloch Oscillations to Long-Range Dynamical Tunneling.” Physical Review Research, vol. 7, no. 1, 013141, American Physical Society (APS), 2025, doi:10.1103/physrevresearch.7.013141.' short: U. Ali, M. Holthaus, T. Meier, Physical Review Research 7 (2025). date_created: 2025-12-05T09:36:31Z date_updated: 2025-12-05T09:37:10Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' - _id: '35' doi: 10.1103/physrevresearch.7.013141 intvolume: ' 7' issue: '1' language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: 'Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling' type: journal_article user_id: '16199' volume: 7 year: '2025' ... --- _id: '62911' abstract: - lang: eng text: In this paper, we theoretically study the spectral and temporal properties of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides. Our theoretical approach is based on the formalism of Gaussian states and the Langevin equation, which is elaborated for weak parametric down-conversion and photon-number-unresolved click detection. Using the example of frequency-degenerate type-II SPDC generated under the pump-idler group-velocity-matching condition, we show how the joint-spectral intensity, mode structure, normalized second-order correlation function, and Hong-Ou-Mandel interference pattern depend on internal losses of the SPDC process. We found that the joint-spectral intensity is almost insensitive to internal losses, while the second-order correlation function shows a strong dependence on them, being different for the signal and idler beams in the presence of internal losses. Based on the sensitivity of the normalized second-order correlation function, we show how its measurement can be used to experimentally determine internal losses. article_number: '033122' author: - first_name: Denis A. full_name: Kopylov, Denis A. last_name: Kopylov - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Polina R. full_name: Sharapova, Polina R. id: '60286' last_name: Sharapova citation: ama: 'Kopylov DA, Stefszky M, Meier T, Silberhorn C, Sharapova PR. Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. Physical Review Research. 2025;7(3). doi:10.1103/zp72-7qwl' apa: 'Kopylov, D. A., Stefszky, M., Meier, T., Silberhorn, C., & Sharapova, P. R. (2025). Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. Physical Review Research, 7(3), Article 033122. https://doi.org/10.1103/zp72-7qwl' bibtex: '@article{Kopylov_Stefszky_Meier_Silberhorn_Sharapova_2025, title={Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation}, volume={7}, DOI={10.1103/zp72-7qwl}, number={3033122}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Kopylov, Denis A. and Stefszky, Michael and Meier, Torsten and Silberhorn, Christine and Sharapova, Polina R.}, year={2025} }' chicago: 'Kopylov, Denis A., Michael Stefszky, Torsten Meier, Christine Silberhorn, and Polina R. Sharapova. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” Physical Review Research 7, no. 3 (2025). https://doi.org/10.1103/zp72-7qwl.' ieee: 'D. A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, and P. R. Sharapova, “Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation,” Physical Review Research, vol. 7, no. 3, Art. no. 033122, 2025, doi: 10.1103/zp72-7qwl.' mla: 'Kopylov, Denis A., et al. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” Physical Review Research, vol. 7, no. 3, 033122, American Physical Society (APS), 2025, doi:10.1103/zp72-7qwl.' short: D.A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, P.R. Sharapova, Physical Review Research 7 (2025). date_created: 2025-12-05T09:33:36Z date_updated: 2025-12-05T09:55:22Z department: - _id: '15' - _id: '569' - _id: '170' - _id: '293' - _id: '288' - _id: '230' - _id: '623' - _id: '429' - _id: '35' doi: 10.1103/zp72-7qwl intvolume: ' 7' issue: '3' language: - iso: eng project: - _id: '266' name: 'PhoQC: Photonisches Quantencomputing' - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '56' name: TRR 142 - Project Area C - _id: '174' name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse' publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: 'Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation' type: journal_article user_id: '16199' volume: 7 year: '2025' ... --- _id: '62913' author: - first_name: Anna full_name: Hunstig, Anna id: '73659' last_name: Hunstig - first_name: Sebastian full_name: Peitz, Sebastian id: '47427' last_name: Peitz orcid: 0000-0002-3389-793X - first_name: Hendrik full_name: Rose, Hendrik id: '55958' last_name: Rose orcid: 0000-0002-3079-5428 - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: 'Hunstig A, Peitz S, Rose H, Meier T. Accelerating the analysis of optical quantum systems using the Koopman operator. In: 2024 IEEE 63rd Conference on Decision and Control (CDC). IEEE; 2025. doi:10.1109/cdc56724.2024.10886589' apa: Hunstig, A., Peitz, S., Rose, H., & Meier, T. (2025). Accelerating the analysis of optical quantum systems using the Koopman operator. 2024 IEEE 63rd Conference on Decision and Control (CDC). https://doi.org/10.1109/cdc56724.2024.10886589 bibtex: '@inproceedings{Hunstig_Peitz_Rose_Meier_2025, title={Accelerating the analysis of optical quantum systems using the Koopman operator}, DOI={10.1109/cdc56724.2024.10886589}, booktitle={2024 IEEE 63rd Conference on Decision and Control (CDC)}, publisher={IEEE}, author={Hunstig, Anna and Peitz, Sebastian and Rose, Hendrik and Meier, Torsten}, year={2025} }' chicago: Hunstig, Anna, Sebastian Peitz, Hendrik Rose, and Torsten Meier. “Accelerating the Analysis of Optical Quantum Systems Using the Koopman Operator.” In 2024 IEEE 63rd Conference on Decision and Control (CDC). IEEE, 2025. https://doi.org/10.1109/cdc56724.2024.10886589. ieee: 'A. Hunstig, S. Peitz, H. Rose, and T. Meier, “Accelerating the analysis of optical quantum systems using the Koopman operator,” 2025, doi: 10.1109/cdc56724.2024.10886589.' mla: Hunstig, Anna, et al. “Accelerating the Analysis of Optical Quantum Systems Using the Koopman Operator.” 2024 IEEE 63rd Conference on Decision and Control (CDC), IEEE, 2025, doi:10.1109/cdc56724.2024.10886589. short: 'A. Hunstig, S. Peitz, H. Rose, T. Meier, in: 2024 IEEE 63rd Conference on Decision and Control (CDC), IEEE, 2025.' date_created: 2025-12-05T09:37:58Z date_updated: 2025-12-05T09:40:24Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' - _id: '623' - _id: '35' doi: 10.1109/cdc56724.2024.10886589 language: - iso: eng project: - _id: '266' name: 'PhoQC: Photonisches Quantencomputing' publication: 2024 IEEE 63rd Conference on Decision and Control (CDC) publication_status: published publisher: IEEE status: public title: Accelerating the analysis of optical quantum systems using the Koopman operator type: conference user_id: '16199' year: '2025' ... --- _id: '60568' article_number: '122776' author: - first_name: Adriana full_name: Bocchini, Adriana id: '58349' last_name: Bocchini orcid: 0000-0002-2134-3075 - first_name: S. full_name: Kollmann, S. last_name: Kollmann - 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 - first_name: Guido full_name: Grundmeier, Guido id: '194' last_name: Grundmeier citation: ama: Bocchini A, Kollmann S, Gerstmann U, Schmidt WG, Grundmeier G. Phosphonic acid adsorption on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si23.svg" display="inline" id="d1e564"><mml:mi>α</mml:mi></mml:math>-Bi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si24.svg" display="inline" id="d1e569"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si25.svg" display="inline" id="d1e577"><mml:msub><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math> surfaces. Surface Science. 2025;760. doi:10.1016/j.susc.2025.122776 apa: Bocchini, A., Kollmann, S., Gerstmann, U., Schmidt, W. G., & Grundmeier, G. (2025). Phosphonic acid adsorption on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si23.svg" display="inline" id="d1e564"><mml:mi>α</mml:mi></mml:math>-Bi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si24.svg" display="inline" id="d1e569"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si25.svg" display="inline" id="d1e577"><mml:msub><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math> surfaces. Surface Science, 760, Article 122776. https://doi.org/10.1016/j.susc.2025.122776 bibtex: '@article{Bocchini_Kollmann_Gerstmann_Schmidt_Grundmeier_2025, title={Phosphonic acid adsorption on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si23.svg" display="inline" id="d1e564"><mml:mi>α</mml:mi></mml:math>-Bi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si24.svg" display="inline" id="d1e569"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si25.svg" display="inline" id="d1e577"><mml:msub><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math> surfaces}, volume={760}, DOI={10.1016/j.susc.2025.122776}, number={122776}, journal={Surface Science}, publisher={Elsevier BV}, author={Bocchini, Adriana and Kollmann, S. and Gerstmann, Uwe and Schmidt, Wolf Gero and Grundmeier, Guido}, year={2025} }' chicago: Bocchini, Adriana, S. Kollmann, Uwe Gerstmann, Wolf Gero Schmidt, and Guido Grundmeier. “Phosphonic Acid Adsorption on <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si23.Svg" Display="inline" Id="d1e564"><mml:Mi>α</Mml:Mi></Mml:Math>-Bi<mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si24.Svg" Display="inline" Id="d1e569"><mml:Msub><mml:Mrow/><mml:Mrow><mml:Mn>2</Mml:Mn></Mml:Mrow></Mml:Msub></Mml:Math>O<mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si25.Svg" Display="inline" Id="d1e577"><mml:Msub><mml:Mrow/><mml:Mrow><mml:Mn>3</Mml:Mn></Mml:Mrow></Mml:Msub></Mml:Math> Surfaces.” Surface Science 760 (2025). https://doi.org/10.1016/j.susc.2025.122776. ieee: 'A. Bocchini, S. Kollmann, U. Gerstmann, W. G. Schmidt, and G. Grundmeier, “Phosphonic acid adsorption on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si23.svg" display="inline" id="d1e564"><mml:mi>α</mml:mi></mml:math>-Bi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si24.svg" display="inline" id="d1e569"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si25.svg" display="inline" id="d1e577"><mml:msub><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math> surfaces,” Surface Science, vol. 760, Art. no. 122776, 2025, doi: 10.1016/j.susc.2025.122776.' mla: Bocchini, Adriana, et al. “Phosphonic Acid Adsorption on <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si23.Svg" Display="inline" Id="d1e564"><mml:Mi>α</Mml:Mi></Mml:Math>-Bi<mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si24.Svg" Display="inline" Id="d1e569"><mml:Msub><mml:Mrow/><mml:Mrow><mml:Mn>2</Mml:Mn></Mml:Mrow></Mml:Msub></Mml:Math>O<mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML" Altimg="si25.Svg" Display="inline" Id="d1e577"><mml:Msub><mml:Mrow/><mml:Mrow><mml:Mn>3</Mml:Mn></Mml:Mrow></Mml:Msub></Mml:Math> Surfaces.” Surface Science, vol. 760, 122776, Elsevier BV, 2025, doi:10.1016/j.susc.2025.122776. short: A. Bocchini, S. Kollmann, U. Gerstmann, W.G. Schmidt, G. Grundmeier, Surface Science 760 (2025). date_created: 2025-07-09T09:23:04Z date_updated: 2025-12-05T13:34:10Z department: - _id: '15' - _id: '2' - _id: '230' - _id: '295' - _id: '790' - _id: '302' - _id: '429' - _id: '35' - _id: '170' - _id: '27' doi: 10.1016/j.susc.2025.122776 intvolume: ' 760' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1016/j.susc.2025.122776 oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' - _id: '168' name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)' - _id: '166' name: 'TRR 142 - A11: TRR 142 - Subproject A11' publication: Surface Science publication_identifier: issn: - 0039-6028 publication_status: published publisher: Elsevier BV status: public title: Phosphonic acid adsorption on α-Bi2O3 surfaces type: journal_article user_id: '16199' volume: 760 year: '2025' ... --- _id: '61353' abstract: - lang: eng text: "Abstract\r\n Muonic hydrogen is an exotic atom where a muon instead of an electron is bound to a proton. The comparably high mass of the muon (≈ 207 · me\r\n \ ) has two important effects, (i) the reduced mass of the system becomes more important, and (ii) the muon is localized much closer to the nucleus. Thus, muonic hydrogen is not only excellently suitable for evaluating highly precise quantum electrodynamic (QED) calculations, but may also be used for assessing new approaches including finite nuclear size (FNS) effects to evaluate the proton structure and improve calculation schemes for the hyperfine splittings of many-particle systems, as e.g. to be implemented in density functional theory (DFT) software packages. Here, starting from Dirac’s equation we calculate the relativistic hyperfine splitting of the ground state and several excited states of muonic hydrogen analytically for different charge and magnetization models. The FNS related hyperfine shifts are compared with the differences between QED calculations and experimental measurements. This comparison also allows to unravel the role of the reduced mass, which is on one hand crucial in case of muonic atoms, but on the other hand is by no means well defined in relativistic quantum mechanics." article_number: '012001' author: - first_name: Katharina L. full_name: Franzke, Katharina L. last_name: Franzke - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X citation: ama: 'Franzke KL, Schmidt WG, Gerstmann U. Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen. Journal of Physics: Conference Series. 2025;3027(1). doi:10.1088/1742-6596/3027/1/012001' apa: 'Franzke, K. L., Schmidt, W. G., & Gerstmann, U. (2025). Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen. Journal of Physics: Conference Series, 3027(1), Article 012001. https://doi.org/10.1088/1742-6596/3027/1/012001' bibtex: '@article{Franzke_Schmidt_Gerstmann_2025, title={Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen}, volume={3027}, DOI={10.1088/1742-6596/3027/1/012001}, number={1012001}, journal={Journal of Physics: Conference Series}, publisher={IOP Publishing}, author={Franzke, Katharina L. and Schmidt, Wolf Gero and Gerstmann, Uwe}, year={2025} }' chicago: 'Franzke, Katharina L., Wolf Gero Schmidt, and Uwe Gerstmann. “Finite-Size and Relativistic Effects onto Hyperfine Interaction of Muonic Hydrogen.” Journal of Physics: Conference Series 3027, no. 1 (2025). https://doi.org/10.1088/1742-6596/3027/1/012001.' ieee: 'K. L. Franzke, W. G. Schmidt, and U. Gerstmann, “Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen,” Journal of Physics: Conference Series, vol. 3027, no. 1, Art. no. 012001, 2025, doi: 10.1088/1742-6596/3027/1/012001.' mla: 'Franzke, Katharina L., et al. “Finite-Size and Relativistic Effects onto Hyperfine Interaction of Muonic Hydrogen.” Journal of Physics: Conference Series, vol. 3027, no. 1, 012001, IOP Publishing, 2025, doi:10.1088/1742-6596/3027/1/012001.' short: 'K.L. Franzke, W.G. Schmidt, U. Gerstmann, Journal of Physics: Conference Series 3027 (2025).' date_created: 2025-09-18T11:17:05Z date_updated: 2025-12-05T13:32:45Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '35' - _id: '230' - _id: '429' - _id: '27' - _id: '790' doi: 10.1088/1742-6596/3027/1/012001 intvolume: ' 3027' issue: '1' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '54' name: TRR 142 - Project Area A - _id: '166' name: TRR 142 - Subproject A11 publication: 'Journal of Physics: Conference Series' publication_identifier: issn: - 1742-6588 - 1742-6596 publication_status: published publisher: IOP Publishing status: public title: Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen type: journal_article user_id: '16199' volume: 3027 year: '2025' ... --- _id: '61352' author: - first_name: Vasanthan full_name: Devaraj, Vasanthan id: '103814' last_name: Devaraj - first_name: Isaac Azahel full_name: Ruiz Alvarado, Isaac Azahel id: '79462' last_name: Ruiz Alvarado orcid: 0000-0002-4710-1170 - first_name: Jongmin full_name: Lee, Jongmin last_name: Lee - first_name: Jin-Woo full_name: Oh, Jin-Woo last_name: Oh - 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 - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: 'Devaraj V, Ruiz Alvarado IA, Lee J, et al. Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly. In: 2025 Conference on Lasers and Electro-Optics Europe &amp;Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE; 2025. doi:10.1109/cleo/europe-eqec65582.2025.11109762' apa: Devaraj, V., Ruiz Alvarado, I. A., Lee, J., Oh, J.-W., Gerstmann, U., Schmidt, W. G., & Zentgraf, T. (2025). Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly. 2025 Conference on Lasers and Electro-Optics Europe &amp;Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC). https://doi.org/10.1109/cleo/europe-eqec65582.2025.11109762 bibtex: '@inproceedings{Devaraj_Ruiz Alvarado_Lee_Oh_Gerstmann_Schmidt_Zentgraf_2025, title={Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly}, DOI={10.1109/cleo/europe-eqec65582.2025.11109762}, booktitle={2025 Conference on Lasers and Electro-Optics Europe &amp;amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)}, publisher={IEEE}, author={Devaraj, Vasanthan and Ruiz Alvarado, Isaac Azahel and Lee, Jongmin and Oh, Jin-Woo and Gerstmann, Uwe and Schmidt, Wolf Gero and Zentgraf, Thomas}, year={2025} }' chicago: Devaraj, Vasanthan, Isaac Azahel Ruiz Alvarado, Jongmin Lee, Jin-Woo Oh, Uwe Gerstmann, Wolf Gero Schmidt, and Thomas Zentgraf. “Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly.” In 2025 Conference on Lasers and Electro-Optics Europe &amp;Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2025. https://doi.org/10.1109/cleo/europe-eqec65582.2025.11109762. ieee: 'V. Devaraj et al., “Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly,” 2025, doi: 10.1109/cleo/europe-eqec65582.2025.11109762.' mla: Devaraj, Vasanthan, et al. “Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly.” 2025 Conference on Lasers and Electro-Optics Europe &amp;Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC), IEEE, 2025, doi:10.1109/cleo/europe-eqec65582.2025.11109762. short: 'V. Devaraj, I.A. Ruiz Alvarado, J. Lee, J.-W. Oh, U. Gerstmann, W.G. Schmidt, T. Zentgraf, in: 2025 Conference on Lasers and Electro-Optics Europe &amp;Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC), IEEE, 2025.' date_created: 2025-09-18T11:09:30Z date_updated: 2025-12-05T13:32:18Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '289' - _id: '35' - _id: '230' - _id: '790' doi: 10.1109/cleo/europe-eqec65582.2025.11109762 language: - iso: eng publication: 2025 Conference on Lasers and Electro-Optics Europe &amp; European Quantum Electronics Conference (CLEO/Europe-EQEC) publication_status: published publisher: IEEE status: public title: Dynamic and Reversible Plasmonic Nanogaps From Isolated Dimer Nanoparticles via Self-Assembly type: conference user_id: '16199' year: '2025' ... --- _id: '62866' abstract: - lang: eng text: "Abstract\r\n \r\n The development of efficient and broadly applicable n‐doping strategies for organic semiconductors (OSCs) is crucial for advancing the performance of various organic electronic devices. Here, a novel nucleophilic‐attack n‐doping mechanism is unveiled that achieves exceptionally high conductivity in doped OSC films and demonstrates broad applicability across OSCs. The remarkable efficacy of n‐Butyl lithium (n‐BuLi) is highlighted in n‐doping C\r\n 60\r\n \ and PC\r\n 61\r\n \ BM, achieving a conductivity of 1.27 S cm\r\n −1\r\n \ and 2.57 S cm\r\n −1\r\n \ , respectively, which are among the highest reported values for these materials. The investigation reveals that the n‐BuLi anion interacts with electron‐deficient units in OSCs, generating a carbanion that facilitates efficient electron transfer for n‐doping. This mechanism is further validated across diverse fullerenes, polymeric, and small molecule OSCs, and is extendable to other high‐performance dopants such as tert‐Butyllithium (tert‐BuLi) and sodium ethoxide (NaOEt). Device studies show that n‐BuLi‐doped C\r\n 60\r\n \ enables substantially improved diode rectification, attributed to greater junction built‐in potential. These findings establish a unified chemical‐bonding‐based n‐doping paradigm, complementing existing electrophilic‐attack p‐doping concepts, and pave the way for achieving efficient doping of OSCs for advanced organic electronic applications.\r\n " article_number: e20487 author: - first_name: Huan full_name: Wei, Huan last_name: Wei - first_name: Tong full_name: Wu, Tong last_name: Wu - first_name: Chuanding full_name: Dong, Chuanding last_name: Dong - first_name: Chen full_name: Chen, Chen last_name: Chen - first_name: Zhenqi full_name: Gong, Zhenqi last_name: Gong - first_name: Jiangnan full_name: Xia, Jiangnan last_name: Xia - first_name: Chengyuan full_name: Peng, Chengyuan last_name: Peng - first_name: Jiaqi full_name: Ding, Jiaqi last_name: Ding - first_name: Yu full_name: Zhang, Yu last_name: Zhang - first_name: Wenpei full_name: Shi, Wenpei last_name: Shi - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Xue full_name: Zhang, Xue last_name: Zhang - first_name: Yugang full_name: Bai, Yugang last_name: Bai - first_name: Lang full_name: Jiang, Lang last_name: Jiang - first_name: Lei full_name: Liao, Lei last_name: Liao - first_name: Thuc‐Quyen full_name: Nguyen, Thuc‐Quyen last_name: Nguyen - first_name: Yuanyuan full_name: Hu, Yuanyuan last_name: Hu citation: ama: Wei H, Wu T, Dong C, et al. Efficient n‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism. Advanced Science. Published online 2025. doi:10.1002/advs.202520487 apa: Wei, H., Wu, T., Dong, C., Chen, C., Gong, Z., Xia, J., Peng, C., Ding, J., Zhang, Y., Shi, W., Schumacher, S., Zhang, X., Bai, Y., Jiang, L., Liao, L., Nguyen, T., & Hu, Y. (2025). Efficient n‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism. Advanced Science, Article e20487. https://doi.org/10.1002/advs.202520487 bibtex: '@article{Wei_Wu_Dong_Chen_Gong_Xia_Peng_Ding_Zhang_Shi_et al._2025, title={Efficient n‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism}, DOI={10.1002/advs.202520487}, number={e20487}, journal={Advanced Science}, publisher={Wiley}, author={Wei, Huan and Wu, Tong and Dong, Chuanding and Chen, Chen and Gong, Zhenqi and Xia, Jiangnan and Peng, Chengyuan and Ding, Jiaqi and Zhang, Yu and Shi, Wenpei and et al.}, year={2025} }' chicago: Wei, Huan, Tong Wu, Chuanding Dong, Chen Chen, Zhenqi Gong, Jiangnan Xia, Chengyuan Peng, et al. “Efficient N‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism.” Advanced Science, 2025. https://doi.org/10.1002/advs.202520487. ieee: 'H. Wei et al., “Efficient n‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism,” Advanced Science, Art. no. e20487, 2025, doi: 10.1002/advs.202520487.' mla: Wei, Huan, et al. “Efficient N‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism.” Advanced Science, e20487, Wiley, 2025, doi:10.1002/advs.202520487. short: H. Wei, T. Wu, C. Dong, C. Chen, Z. Gong, J. Xia, C. Peng, J. Ding, Y. Zhang, W. Shi, S. Schumacher, X. Zhang, Y. Bai, L. Jiang, L. Liao, T. Nguyen, Y. Hu, Advanced Science (2025). date_created: 2025-12-04T12:30:39Z date_updated: 2025-12-05T13:40:48Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '705' - _id: '35' - _id: '230' doi: 10.1002/advs.202520487 language: - iso: eng publication: Advanced Science publication_identifier: issn: - 2198-3844 - 2198-3844 publication_status: published publisher: Wiley status: public title: Efficient n‐Doping of Organic Semiconductors via a Broadly Applicable Nucleophilic‐Attack Mechanism type: journal_article user_id: '16199' year: '2025' ... --- _id: '60992' abstract: - lang: eng text: Non-Hermitian systems hosting exceptional points (EPs) exhibit enhanced sensitivity and unconventional mode dynamics. Going beyond isolated EPs, here we report on the existence of exceptional rings (ERs) in planar optical resonators with specific form of circular dichroism and TE-TM splitting. Such exceptional rings possess intriguing topologies as discussed earlier for condensed matter systems, but they remain virtually unexplored in presence of nonlinearity, for which our photonic platform is ideal. We find that when Kerr-type nonlinearity (or saturable gain) is introduced, the linear ER splits into two concentric ERs, with the larger-radius ring being a ring of third-order EPs. Transitioning from linear to nonlinear regime, we present a rigorous analysis of spectral topology and report enhanced and adjustable perturbation response in the nonlinear regime. Whereas certain features are specific to our system, the results on non-Hermitian spectral topology and nonlinearity-enhanced perturbation response are generic and equally relevant to a broad class of other nonlinear non-Hermitian systems, providing a universal framework for engineering ERs and EPs in nonlinear non-Hermitian systems. author: - first_name: Jan full_name: Wingenbach, Jan id: '69187' last_name: Wingenbach - first_name: 'Laura ' full_name: 'Ares Santos, Laura ' last_name: Ares Santos - first_name: Xuekai full_name: Ma, Xuekai id: '59416' last_name: Ma - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Wingenbach J, Ares Santos L, Ma X, Sperling J, Schumacher S. Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities. Arxiv. Published online 2025. doi:10.48550/ARXIV.2507.07099 apa: Wingenbach, J., Ares Santos, L., Ma, X., Sperling, J., & Schumacher, S. (2025). Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities. Arxiv. https://doi.org/10.48550/ARXIV.2507.07099 bibtex: '@article{Wingenbach_Ares Santos_Ma_Sperling_Schumacher_2025, title={Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities}, DOI={10.48550/ARXIV.2507.07099}, journal={Arxiv}, publisher={Arxiv}, author={Wingenbach, Jan and Ares Santos, Laura and Ma, Xuekai and Sperling, Jan and Schumacher, Stefan}, year={2025} }' chicago: Wingenbach, Jan, Laura Ares Santos, Xuekai Ma, Jan Sperling, and Stefan Schumacher. “Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities.” Arxiv, 2025. https://doi.org/10.48550/ARXIV.2507.07099. ieee: 'J. Wingenbach, L. Ares Santos, X. Ma, J. Sperling, and S. Schumacher, “Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities,” Arxiv, 2025, doi: 10.48550/ARXIV.2507.07099.' mla: Wingenbach, Jan, et al. “Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities.” Arxiv, Arxiv, 2025, doi:10.48550/ARXIV.2507.07099. short: J. Wingenbach, L. Ares Santos, X. Ma, J. Sperling, S. Schumacher, Arxiv (2025). date_created: 2025-08-25T11:15:22Z date_updated: 2025-12-05T13:55:48Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '706' - _id: '705' - _id: '35' - _id: '230' - _id: '429' - _id: '27' doi: 10.48550/ARXIV.2507.07099 language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '174' name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse' - _id: '56' name: TRR 142 - Project Area C publication: Arxiv publisher: Arxiv status: public title: Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities type: journal_article user_id: '16199' year: '2025' ... --- _id: '62926' abstract: - lang: eng text: "Abstract\r\n \r\n Negatively charged boron vacancies () in hexagonal boron nitride (hBN) are emerging as promising solid‐state spin qubits due to their optical accessibility, structural simplicity, and compatibility with photonic platforms. However, quantifying the density of such defects in thin hBN flakes has remained elusive, limiting progress in device integration and reproducibility. Here, an all‐optical method is presented to quantify \ defect density in hBN by correlating Raman and photoluminescence (PL) signatures with irradiation fluence. Two defect‐induced Raman modes, D1 and D2, are identified and assigned them to vibrational modes of using polarization‐resolved Raman measurements and density functional theory (DFT) calculations. By adapting a numerical model originally developed for graphene, an empirical relationship linking Raman (D1,\r\n \ E\r\n 2g\r\n \ ) and PL intensities is established to absolute defect densities. This method is universally applicable across various irradiation types and uniquely suited for thin flakes, where conventional techniques fail. The approach enables accurate, direct, and non‐destructive quantification of spin defect densities down to 10\r\n 15\r\n  defects/cm\r\n \ 3\r\n , offering a powerful tool for optimizing and benchmarking hBN for quantum optical applications.\r\n \ " article_number: e17851 author: - first_name: Atanu full_name: Patra, Atanu last_name: Patra - first_name: Paul full_name: Konrad, Paul last_name: Konrad - first_name: Andreas full_name: Sperlich, Andreas last_name: Sperlich - first_name: Timur full_name: Biktagirov, Timur id: '65612' last_name: Biktagirov - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Lesley full_name: Spencer, Lesley last_name: Spencer - first_name: Igor full_name: Aharonovich, Igor last_name: Aharonovich - first_name: Sven full_name: Höfling, Sven last_name: Höfling - first_name: Vladimir full_name: Dyakonov, Vladimir last_name: Dyakonov citation: ama: Patra A, Konrad P, Sperlich A, et al. Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis. Advanced Functional Materials. Published online 2025. doi:10.1002/adfm.202517851 apa: Patra, A., Konrad, P., Sperlich, A., Biktagirov, T., Schmidt, W. G., Spencer, L., Aharonovich, I., Höfling, S., & Dyakonov, V. (2025). Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis. Advanced Functional Materials, Article e17851. https://doi.org/10.1002/adfm.202517851 bibtex: '@article{Patra_Konrad_Sperlich_Biktagirov_Schmidt_Spencer_Aharonovich_Höfling_Dyakonov_2025, title={Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis}, DOI={10.1002/adfm.202517851}, number={e17851}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Patra, Atanu and Konrad, Paul and Sperlich, Andreas and Biktagirov, Timur and Schmidt, Wolf Gero and Spencer, Lesley and Aharonovich, Igor and Höfling, Sven and Dyakonov, Vladimir}, year={2025} }' chicago: Patra, Atanu, Paul Konrad, Andreas Sperlich, Timur Biktagirov, Wolf Gero Schmidt, Lesley Spencer, Igor Aharonovich, Sven Höfling, and Vladimir Dyakonov. “Quantifying Spin Defect Density in HBN via Raman and Photoluminescence Analysis.” Advanced Functional Materials, 2025. https://doi.org/10.1002/adfm.202517851. ieee: 'A. Patra et al., “Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis,” Advanced Functional Materials, Art. no. e17851, 2025, doi: 10.1002/adfm.202517851.' mla: Patra, Atanu, et al. “Quantifying Spin Defect Density in HBN via Raman and Photoluminescence Analysis.” Advanced Functional Materials, e17851, Wiley, 2025, doi:10.1002/adfm.202517851. short: A. Patra, P. Konrad, A. Sperlich, T. Biktagirov, W.G. Schmidt, L. Spencer, I. Aharonovich, S. Höfling, V. Dyakonov, Advanced Functional Materials (2025). date_created: 2025-12-05T14:15:35Z date_updated: 2025-12-05T14:18:27Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '35' - _id: '230' - _id: '27' doi: 10.1002/adfm.202517851 language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Advanced Functional Materials publication_identifier: issn: - 1616-301X - 1616-3028 publication_status: published publisher: Wiley status: public title: Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis type: journal_article user_id: '16199' year: '2025' ... --- _id: '62980' abstract: - lang: eng text: We introduce a new classification of multimode states with a fixed number of photons. This classification is based on the factorizability of homogeneous multivariate polynomials and is invariant under unitary transformations. The classes physically correspond to field excitations in terms of single and multiple photons, each of which is in an arbitrary irreducible superposition of quantized modes. We further show how the transitions between classes are rendered possible by photon addition, photon subtraction, and photon-projection nonlinearities. We explicitly put forward a design for a multilayer interferometer in which the states for different classes can be generated with state-of-the-art experimental techniques. Limitations of the proposed designs are analyzed using the introduced classification, providing a benchmark for the robustness of certain states and classes. article_number: '033062' author: - first_name: Denis A. full_name: Kopylov, Denis A. last_name: Kopylov - first_name: Christian full_name: Offen, Christian id: '85279' last_name: Offen orcid: 0000-0002-5940-8057 - first_name: Laura full_name: Ares, Laura last_name: Ares - first_name: Boris Edgar full_name: Wembe Moafo, Boris Edgar id: '95394' last_name: Wembe Moafo - first_name: Sina full_name: Ober-Blöbaum, Sina id: '16494' last_name: Ober-Blöbaum - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Polina R. full_name: Sharapova, Polina R. id: '60286' last_name: Sharapova - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 citation: ama: Kopylov DA, Offen C, Ares L, et al. Multiphoton, multimode state classification for nonlinear optical circuits. Physical Review Research. 2025;7(3). doi:10.1103/sv6z-v1gk apa: Kopylov, D. A., Offen, C., Ares, L., Wembe Moafo, B. E., Ober-Blöbaum, S., Meier, T., Sharapova, P. R., & Sperling, J. (2025). Multiphoton, multimode state classification for nonlinear optical circuits. Physical Review Research, 7(3), Article 033062. https://doi.org/10.1103/sv6z-v1gk bibtex: '@article{Kopylov_Offen_Ares_Wembe Moafo_Ober-Blöbaum_Meier_Sharapova_Sperling_2025, title={Multiphoton, multimode state classification for nonlinear optical circuits}, volume={7}, DOI={10.1103/sv6z-v1gk}, number={3033062}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Kopylov, Denis A. and Offen, Christian and Ares, Laura and Wembe Moafo, Boris Edgar and Ober-Blöbaum, Sina and Meier, Torsten and Sharapova, Polina R. and Sperling, Jan}, year={2025} }' chicago: Kopylov, Denis A., Christian Offen, Laura Ares, Boris Edgar Wembe Moafo, Sina Ober-Blöbaum, Torsten Meier, Polina R. Sharapova, and Jan Sperling. “Multiphoton, Multimode State Classification for Nonlinear Optical Circuits.” Physical Review Research 7, no. 3 (2025). https://doi.org/10.1103/sv6z-v1gk. ieee: 'D. A. Kopylov et al., “Multiphoton, multimode state classification for nonlinear optical circuits,” Physical Review Research, vol. 7, no. 3, Art. no. 033062, 2025, doi: 10.1103/sv6z-v1gk.' mla: Kopylov, Denis A., et al. “Multiphoton, Multimode State Classification for Nonlinear Optical Circuits.” Physical Review Research, vol. 7, no. 3, 033062, American Physical Society (APS), 2025, doi:10.1103/sv6z-v1gk. short: D.A. Kopylov, C. Offen, L. Ares, B.E. Wembe Moafo, S. Ober-Blöbaum, T. Meier, P.R. Sharapova, J. Sperling, Physical Review Research 7 (2025). date_created: 2025-12-09T09:08:39Z date_updated: 2025-12-09T09:10:01Z department: - _id: '15' - _id: '569' - _id: '170' - _id: '293' - _id: '706' - _id: '636' - _id: '35' - _id: '230' - _id: '429' - _id: '623' doi: 10.1103/sv6z-v1gk intvolume: ' 7' issue: '3' language: - iso: eng project: - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '56' name: TRR 142 - Project Area C - _id: '174' name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse' - _id: '266' name: 'PhoQC: Photonisches Quantencomputing' publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: Multiphoton, multimode state classification for nonlinear optical circuits type: journal_article user_id: '16199' volume: 7 year: '2025' ...