--- _id: '42800' abstract: - lang: eng text: In this paper we present a new system architecture for software-defined radio / radar with optical signal distribution. The proposed architecture allows to transmit the optical carrier and an arbitrary IQ signal on the same fiber from a base station to wireless transmitters using a single laser. Furthermore, we can reuse parts, and under special conditions, also the complete optical output of the base station for the IQ return path from the wireless receiver frontends to the base station. Avoiding multiple lasers and fibers for the distribution of the carrier and arbitrary signal from the base station to the frontend, and avoiding the laser diode for the IQ return path from receiver frontends to the base station reduces the hardware effort significantly. Finally, the system architecture allows to integrate all components of the optoelectronic wireless frontend in a single chip using silicon photonics technology. author: - first_name: Stephan full_name: Kruse, Stephan id: '38254' last_name: Kruse - first_name: Pascal full_name: Kneuper, Pascal id: '47367' last_name: Kneuper - first_name: Tobias full_name: Schwabe, Tobias id: '39217' last_name: Schwabe - first_name: Marc-Michael full_name: Meinecke, Marc-Michael last_name: Meinecke - first_name: Heiko G. full_name: Kurz, Heiko G. last_name: Kurz - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: https://orcid.org/0000-0002-5950-6618 citation: ama: 'Kruse S, Kneuper P, Schwabe T, Meinecke M-M, Kurz HG, Scheytt JC. Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution. In: ; 2023.' apa: Kruse, S., Kneuper, P., Schwabe, T., Meinecke, M.-M., Kurz, H. G., & Scheytt, J. C. (2023). Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution. INTERNATIONAL RADAR SYMPOSIUM (IRS 2023), Fraunhofer-Forum Berlin, Germany. bibtex: '@inproceedings{Kruse_Kneuper_Schwabe_Meinecke_Kurz_Scheytt_2023, title={Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution}, author={Kruse, Stephan and Kneuper, Pascal and Schwabe, Tobias and Meinecke, Marc-Michael and Kurz, Heiko G. and Scheytt, J. Christoph}, year={2023} }' chicago: Kruse, Stephan, Pascal Kneuper, Tobias Schwabe, Marc-Michael Meinecke, Heiko G. Kurz, and J. Christoph Scheytt. “Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution,” 2023. ieee: S. Kruse, P. Kneuper, T. Schwabe, M.-M. Meinecke, H. G. Kurz, and J. C. Scheytt, “Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution,” presented at the INTERNATIONAL RADAR SYMPOSIUM (IRS 2023), Fraunhofer-Forum Berlin, Germany, 2023. mla: Kruse, Stephan, et al. Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution. 2023. short: 'S. Kruse, P. Kneuper, T. Schwabe, M.-M. Meinecke, H.G. Kurz, J.C. Scheytt, in: 2023.' conference: end_date: 2023.05.26 location: Fraunhofer-Forum Berlin, Germany name: INTERNATIONAL RADAR SYMPOSIUM (IRS 2023) start_date: 2023.05.24 date_created: 2023-03-07T08:50:56Z date_updated: 2023-09-27T11:11:38Z department: - _id: '58' - _id: '230' language: - iso: eng related_material: link: - relation: confirmation url: https://www.dgon-irs.org/home/ status: public title: Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution type: conference user_id: '15931' year: '2023' ... --- _id: '47126' author: - first_name: Stephan full_name: Kruse, Stephan id: '38254' last_name: Kruse - first_name: Jan C. full_name: Greitens, Jan C. last_name: Greitens - first_name: Tobias full_name: Schwabe, Tobias id: '39217' last_name: Schwabe - first_name: Pascal full_name: Kneuper, Pascal id: '47367' last_name: Kneuper - first_name: Heiko G. full_name: Kurz, Heiko G. last_name: Kurz - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: '0000-0002-5950-6618 ' citation: ama: Kruse S, Greitens JC, Schwabe T, Kneuper P, Kurz HG, Scheytt JC. A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics. IEEE Microwave and Wireless Technology Letters . Published online 2023. apa: Kruse, S., Greitens, J. C., Schwabe, T., Kneuper, P., Kurz, H. G., & Scheytt, J. C. (2023). A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics. IEEE Microwave and Wireless Technology Letters . bibtex: '@article{Kruse_Greitens_Schwabe_Kneuper_Kurz_Scheytt_2023, title={A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics}, journal={IEEE Microwave and Wireless Technology Letters }, author={Kruse, Stephan and Greitens, Jan C. and Schwabe, Tobias and Kneuper, Pascal and Kurz, Heiko G. and Scheytt, J. Christoph}, year={2023} }' chicago: Kruse, Stephan, Jan C. Greitens, Tobias Schwabe, Pascal Kneuper, Heiko G. Kurz, and J. Christoph Scheytt. “A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics.” IEEE Microwave and Wireless Technology Letters , 2023. ieee: S. Kruse, J. C. Greitens, T. Schwabe, P. Kneuper, H. G. Kurz, and J. C. Scheytt, “A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics,” IEEE Microwave and Wireless Technology Letters , 2023. mla: Kruse, Stephan, et al. “A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics.” IEEE Microwave and Wireless Technology Letters , 2023. short: S. Kruse, J.C. Greitens, T. Schwabe, P. Kneuper, H.G. Kurz, J.C. Scheytt, IEEE Microwave and Wireless Technology Letters (2023). date_created: 2023-09-19T06:57:57Z date_updated: 2023-09-27T11:10:03Z department: - _id: '58' - _id: '230' language: - iso: eng publication: 'IEEE Microwave and Wireless Technology Letters ' status: public title: A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics type: journal_article user_id: '15931' year: '2023' ... --- _id: '47521' abstract: - lang: eng text: "This paper experimentally investigates and interprets the e®ects of noise and non-\r\nlinearity in a silicon photonic optical test structure. For the analysis di®erent optoelectronic phase\r\nnoise measurement techniques are used. Our tests focuses on the performance of integrated opti-\r\ncal test structures using femtosecond pulses in the 1550nm spectral range. A primary objective\r\nis to understand the behaviour of silicon photonic waveguides that can be further employed in the\r\nimplementation of an optoelectronic phase-locked loop (OEPLL) in silicon photonics technology.\r\nA comparison of our results, as well as a discussion on the di®erent optoelectronic phase noise\r\nmeasurement techniques are presented. Our ¯ndings provide insights that can be leveraged to\r\noptimize the design and performance of ultra-low phase noise on-chip OEPLL systems locking\r\nto mode-locked laser (MLL) signals. In the future such systems can be essential for advanced\r\ncommunication and sensing applications." author: - first_name: Vijayalakshmi full_name: Surendranath Shroff, Vijayalakshmi id: '76626' last_name: Surendranath Shroff - first_name: Christian full_name: Kress, Christian id: '13256' last_name: Kress - first_name: Meysam full_name: Bahmanian, Meysam id: '69233' last_name: Bahmanian - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: '0000-0002-5950-6618 ' citation: ama: 'Surendranath Shroff V, Kress C, Bahmanian M, Scheytt JC. Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics. In: 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), . IEEE; 2023. doi:10.1109/PIERS59004.2023.10221473' apa: Surendranath Shroff, V., Kress, C., Bahmanian, M., & Scheytt, J. C. (2023). Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics. 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), . 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), Prague, Czech Republic. https://doi.org/10.1109/PIERS59004.2023.10221473 bibtex: '@inproceedings{Surendranath Shroff_Kress_Bahmanian_Scheytt_2023, title={Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics}, DOI={10.1109/PIERS59004.2023.10221473}, booktitle={2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), }, publisher={IEEE}, author={Surendranath Shroff, Vijayalakshmi and Kress, Christian and Bahmanian, Meysam and Scheytt, J. Christoph}, year={2023} }' chicago: Surendranath Shroff, Vijayalakshmi, Christian Kress, Meysam Bahmanian, and J. Christoph Scheytt. “Analysis of Phase Noise in Waveguide-Integrated Optical Test Structures in Silicon Photonics.” In 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), . IEEE, 2023. https://doi.org/10.1109/PIERS59004.2023.10221473. ieee: 'V. Surendranath Shroff, C. Kress, M. Bahmanian, and J. C. Scheytt, “Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics,” presented at the 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), Prague, Czech Republic, 2023, doi: 10.1109/PIERS59004.2023.10221473.' mla: Surendranath Shroff, Vijayalakshmi, et al. “Analysis of Phase Noise in Waveguide-Integrated Optical Test Structures in Silicon Photonics.” 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), , IEEE, 2023, doi:10.1109/PIERS59004.2023.10221473. short: 'V. Surendranath Shroff, C. Kress, M. Bahmanian, J.C. Scheytt, in: 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), , IEEE, 2023.' conference: end_date: 2023-07-06 location: Prague, Czech Republic name: 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS) start_date: 2023-07-03 date_created: 2023-09-27T11:08:23Z date_updated: 2023-09-27T11:22:26Z department: - _id: '58' - _id: '230' doi: 10.1109/PIERS59004.2023.10221473 language: - iso: eng main_file_link: - url: https://ieeexplore.ieee.org/document/10221473 publication: '2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), ' publication_identifier: eisbn: - 979-8-3503-1284-3 publication_status: published publisher: IEEE related_material: link: - relation: confirmation url: https://ieeexplore.ieee.org/document/10221473 status: public title: Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics type: conference user_id: '15931' year: '2023' ... --- _id: '47543' author: - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: 'Zentgraf T. Symmetry governed nonlinear selection rules in nanophotonics . In: Panoiu NC, ed. Fundamentals and Applications of Nonlinear Nanophotonics. 1st ed. Nanophotonics Series. Elsevier; 2023. doi:10.1016/B978-0-323-90614-2.00011-0' apa: Zentgraf, T. (2023). Symmetry governed nonlinear selection rules in nanophotonics . In N. C. Panoiu (Ed.), Fundamentals and Applications of Nonlinear Nanophotonics (1st ed.). Elsevier. https://doi.org/10.1016/B978-0-323-90614-2.00011-0 bibtex: '@inbook{Zentgraf_2023, place={Amsterdam}, edition={1}, series={Nanophotonics Series}, title={Symmetry governed nonlinear selection rules in nanophotonics }, DOI={10.1016/B978-0-323-90614-2.00011-0}, booktitle={Fundamentals and Applications of Nonlinear Nanophotonics}, publisher={Elsevier}, author={Zentgraf, Thomas}, editor={Panoiu, Nicoae C.}, year={2023}, collection={Nanophotonics Series} }' chicago: 'Zentgraf, Thomas. “Symmetry Governed Nonlinear Selection Rules in Nanophotonics .” In Fundamentals and Applications of Nonlinear Nanophotonics, edited by Nicoae C. Panoiu, 1st ed. Nanophotonics Series. Amsterdam: Elsevier, 2023. https://doi.org/10.1016/B978-0-323-90614-2.00011-0.' ieee: 'T. Zentgraf, “Symmetry governed nonlinear selection rules in nanophotonics ,” in Fundamentals and Applications of Nonlinear Nanophotonics, 1st ed., N. C. Panoiu, Ed. Amsterdam: Elsevier, 2023.' mla: Zentgraf, Thomas. “Symmetry Governed Nonlinear Selection Rules in Nanophotonics .” Fundamentals and Applications of Nonlinear Nanophotonics, edited by Nicoae C. Panoiu, 1st ed., Elsevier, 2023, doi:10.1016/B978-0-323-90614-2.00011-0. short: 'T. Zentgraf, in: N.C. Panoiu (Ed.), Fundamentals and Applications of Nonlinear Nanophotonics, 1st ed., Elsevier, Amsterdam, 2023.' date_created: 2023-10-04T06:22:23Z date_updated: 2023-10-04T06:22:41Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1016/B978-0-323-90614-2.00011-0 edition: '1' editor: - first_name: Nicoae C. full_name: Panoiu, Nicoae C. last_name: Panoiu language: - iso: eng main_file_link: - url: https://www.sciencedirect.com/science/article/pii/B9780323906142000110 place: Amsterdam project: - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '170' grant_number: '231447078' name: 'TRR 142 - B09: TRR 142 - Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen (B09*)' - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' publication: Fundamentals and Applications of Nonlinear Nanophotonics publication_identifier: isbn: - 978-0-323-90614-2 publication_status: published publisher: Elsevier series_title: Nanophotonics Series status: public title: 'Symmetry governed nonlinear selection rules in nanophotonics ' type: book_chapter user_id: '30525' year: '2023' ... --- _id: '46573' abstract: - lang: eng text: 'An ultra-fast change of the absorption onset for zincblende gallium-nitride (zb-GaN) (fundamental bandgap: 3.23 eV) is observed by investigating the imaginary part of the dielectric function using time-dependent femtosecond pump–probe spectroscopic ellipsometry between 2.9 and 3.7 eV. The 266 nm (4.66 eV) pump pulses induce a large electron–hole pair concentration up to 4×1020cm−3, which shift the transition energy between conduction and valence bands due to many-body effects up to ≈500 meV. Here, the absorption onset increases due to band filling while the bandgap renormalization at the same time decreases the bandgap. Additionally, the absorption of the pump-beam creates a free-carrier profile within the 605 nm zb-GaN layer with high free-carrier concentrations at the surface, and low concentrations at the interface to the substrate. This leads to varying optical properties from the sample surface (high transition energy) to substrate (low transition energy), which are taken into account by grading analysis for an accurate description of the experimental data. For this, a model describing the time- and position-dependent free-carrier concentration is formulated by considering the relaxation, recombination, and diffusion of those carriers. We provide a quantitative analysis of optical experimental data (ellipsometric angles Ψ and Δ) as well as a plot for the time-dependent change of the imaginary part of the dielectric function.' author: - first_name: Elias full_name: Baron, Elias last_name: Baron - first_name: Rüdiger full_name: Goldhahn, Rüdiger last_name: Goldhahn - first_name: Shirly full_name: Espinoza, Shirly last_name: Espinoza - first_name: Martin full_name: Zahradník, Martin last_name: Zahradník - first_name: Mateusz full_name: Rebarz, Mateusz last_name: Rebarz - first_name: Jakob full_name: Andreasson, Jakob last_name: Andreasson - first_name: Michael full_name: Deppe, Michael last_name: Deppe - first_name: Donat Josef full_name: As, Donat Josef id: '14' last_name: As orcid: 0000-0003-1121-3565 - first_name: Martin full_name: Feneberg, Martin last_name: Feneberg citation: ama: Baron E, Goldhahn R, Espinoza S, et al. Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function. Journal of Applied Physics. 2023;134(7). doi:10.1063/5.0153091 apa: Baron, E., Goldhahn, R., Espinoza, S., Zahradník, M., Rebarz, M., Andreasson, J., Deppe, M., As, D. J., & Feneberg, M. (2023). Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function. Journal of Applied Physics, 134(7). https://doi.org/10.1063/5.0153091 bibtex: '@article{Baron_Goldhahn_Espinoza_Zahradník_Rebarz_Andreasson_Deppe_As_Feneberg_2023, title={Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function}, volume={134}, DOI={10.1063/5.0153091}, number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Baron, Elias and Goldhahn, Rüdiger and Espinoza, Shirly and Zahradník, Martin and Rebarz, Mateusz and Andreasson, Jakob and Deppe, Michael and As, Donat Josef and Feneberg, Martin}, year={2023} }' chicago: Baron, Elias, Rüdiger Goldhahn, Shirly Espinoza, Martin Zahradník, Mateusz Rebarz, Jakob Andreasson, Michael Deppe, Donat Josef As, and Martin Feneberg. “Time-Resolved Pump–Probe Spectroscopic Ellipsometry of Cubic GaN. I. Determination of the Dielectric Function.” Journal of Applied Physics 134, no. 7 (2023). https://doi.org/10.1063/5.0153091. ieee: 'E. Baron et al., “Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function,” Journal of Applied Physics, vol. 134, no. 7, 2023, doi: 10.1063/5.0153091.' mla: Baron, Elias, et al. “Time-Resolved Pump–Probe Spectroscopic Ellipsometry of Cubic GaN. I. Determination of the Dielectric Function.” Journal of Applied Physics, vol. 134, no. 7, AIP Publishing, 2023, doi:10.1063/5.0153091. short: E. Baron, R. Goldhahn, S. Espinoza, M. Zahradník, M. Rebarz, J. Andreasson, M. Deppe, D.J. As, M. Feneberg, Journal of Applied Physics 134 (2023). date_created: 2023-08-18T08:17:41Z date_updated: 2023-10-09T09:17:15Z department: - _id: '15' - _id: '230' doi: 10.1063/5.0153091 intvolume: ' 134' issue: '7' keyword: - General Physics and Astronomy language: - iso: eng publication: Journal of Applied Physics publication_identifier: issn: - 0021-8979 - 1089-7550 publication_status: published publisher: AIP Publishing status: public title: Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function type: journal_article user_id: '14931' volume: 134 year: '2023' ... --- _id: '49117' article_number: '043158' author: - first_name: D. full_name: Scharwald, D. last_name: Scharwald - first_name: T. full_name: Meier, T. last_name: Meier - first_name: P. R. full_name: Sharapova, P. R. last_name: Sharapova citation: ama: Scharwald D, Meier T, Sharapova PR. Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043158 apa: Scharwald, D., Meier, T., & Sharapova, P. R. (2023). Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers. Physical Review Research, 5(4), Article 043158. https://doi.org/10.1103/physrevresearch.5.043158 bibtex: '@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158}, number={4043158}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Scharwald, D. and Meier, T. and Sharapova, P. R.}, year={2023} }' chicago: Scharwald, D., T. Meier, and P. R. Sharapova. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math> Interferometers.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158. ieee: 'D. Scharwald, T. Meier, and P. R. Sharapova, “Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers,” Physical Review Research, vol. 5, no. 4, Art. no. 043158, 2023, doi: 10.1103/physrevresearch.5.043158.' mla: Scharwald, D., et al. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math> Interferometers.” Physical Review Research, vol. 5, no. 4, 043158, American Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043158. short: D. Scharwald, T. Meier, P.R. Sharapova, Physical Review Research 5 (2023). date_created: 2023-11-22T09:18:02Z date_updated: 2023-11-22T09:19:02Z department: - _id: '15' - _id: '170' - _id: '230' - _id: '569' - _id: '429' doi: 10.1103/physrevresearch.5.043158 intvolume: ' 5' issue: '4' keyword: - General Physics and Astronomy language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers type: journal_article user_id: '60286' volume: 5 year: '2023' ... --- _id: '49607' abstract: - lang: eng text: In this work, we utilize thin dielectric meta-atoms placed on a silver substrate to efficiently enhance and manipulate the third-harmonic generation. We theoretically and experimentally reveal that when the structural symmetry of the meta-atom is incompatible with the lattice symmetry of an array, some generalized nonlinear geometric phases appear, which offers new possibilities for harmonic generation control beyond the accessible symmetries governed by the selection rule. The underlying mechanism is attributed to the modified rotation of the effective principal axis of a dense meta-atom array, where the strong coupling among the units gives rise to a generalized linear geometric phase modulation of the pump light. Therefore, nonlinear geometric phases carried by third-harmonic emissions are the natural result of the wave-mixing process among the modes excited at the fundamental frequency. This mechanism further points out a new strategy to predict the nonlinear geometric phases delivered by the nanostructures according to their linear responses. Our design is simple and efficient and offers alternatives for the nonlinear meta-devices that are capable of flexible photon generation and manipulation. article_type: original author: - first_name: Bingyi full_name: Liu, Bingyi last_name: Liu - first_name: René full_name: Geromel, René last_name: Geromel - first_name: Zhaoxian full_name: Su, Zhaoxian last_name: Su - first_name: Kai full_name: Guo, Kai last_name: Guo - first_name: Yongtian full_name: Wang, Yongtian last_name: Wang - first_name: Zhongyi full_name: Guo, Zhongyi last_name: Guo - first_name: Lingling full_name: Huang, Lingling last_name: Huang - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: Liu B, Geromel R, Su Z, et al. Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design. ACS Photonics. Published online 2023. doi:10.1021/acsphotonics.3c01163 apa: Liu, B., Geromel, R., Su, Z., Guo, K., Wang, Y., Guo, Z., Huang, L., & Zentgraf, T. (2023). Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design. ACS Photonics. https://doi.org/10.1021/acsphotonics.3c01163 bibtex: '@article{Liu_Geromel_Su_Guo_Wang_Guo_Huang_Zentgraf_2023, title={Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design}, DOI={10.1021/acsphotonics.3c01163}, journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Liu, Bingyi and Geromel, René and Su, Zhaoxian and Guo, Kai and Wang, Yongtian and Guo, Zhongyi and Huang, Lingling and Zentgraf, Thomas}, year={2023} }' chicago: Liu, Bingyi, René Geromel, Zhaoxian Su, Kai Guo, Yongtian Wang, Zhongyi Guo, Lingling Huang, and Thomas Zentgraf. “Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design.” ACS Photonics, 2023. https://doi.org/10.1021/acsphotonics.3c01163. ieee: 'B. Liu et al., “Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design,” ACS Photonics, 2023, doi: 10.1021/acsphotonics.3c01163.' mla: Liu, Bingyi, et al. “Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design.” ACS Photonics, American Chemical Society (ACS), 2023, doi:10.1021/acsphotonics.3c01163. short: B. Liu, R. Geromel, Z. Su, K. Guo, Y. Wang, Z. Guo, L. Huang, T. Zentgraf, ACS Photonics (2023). date_created: 2023-12-13T14:11:41Z date_updated: 2023-12-13T14:14:56Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1021/acsphotonics.3c01163 funded_apc: '1' keyword: - Electrical and Electronic Engineering - Atomic and Molecular Physics - and Optics - Biotechnology - Electronic - Optical and Magnetic Materials language: - iso: eng main_file_link: - open_access: '1' url: https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c01163 oa: '1' project: - _id: '170' grant_number: '231447078' name: 'TRR 142 - B09: TRR 142 - Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen (B09*)' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' publication: ACS Photonics publication_identifier: issn: - 2330-4022 - 2330-4022 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' status: public title: Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design type: journal_article user_id: '30525' year: '2023' ... --- _id: '49609' abstract: - lang: eng text: The alignment of liquid crystals on surfaces plays a central role in optimizing their performances. In this work, a cutting-edge nano-lithography-based method to control the local orientation of a thermotropic liquid crystal is applied to easily available commercial standard materials and evaluated. Parallel nanogrooves on a substrate, created through 3D nanoprinting in a negative-tone photoresin optimized for two-photon polymerization are used for this purpose. Azimuthal anchoring energies of the order from 10−6 J/m2 to 10−5 J/m2 are found, depending on the spacing, width and depth of the grooves. In part, these values are larger than those reported previously for another photopolymer. Both uniform alignment and spatial patterns of different alignment directions can be realized. Electro-optic studies confirm the suitability of the method for electrically addressable photonic applications and indicate strong polar anchoring. article_number: '3467' author: - first_name: Bingru full_name: Zhang, Bingru last_name: Zhang - first_name: Malte full_name: Plidschun, Malte last_name: Plidschun - first_name: Markus A. full_name: Schmidt, Markus A. last_name: Schmidt - first_name: Heinz-Siegfried full_name: Kitzerow, Heinz-Siegfried id: '254' last_name: Kitzerow citation: ama: Zhang B, Plidschun M, Schmidt MA, Kitzerow H-S. Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing. Optical Materials Express. 2023;13(12). doi:10.1364/ome.503100 apa: Zhang, B., Plidschun, M., Schmidt, M. A., & Kitzerow, H.-S. (2023). Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing. Optical Materials Express, 13(12), Article 3467. https://doi.org/10.1364/ome.503100 bibtex: '@article{Zhang_Plidschun_Schmidt_Kitzerow_2023, title={Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing}, volume={13}, DOI={10.1364/ome.503100}, number={123467}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Zhang, Bingru and Plidschun, Malte and Schmidt, Markus A. and Kitzerow, Heinz-Siegfried}, year={2023} }' chicago: Zhang, Bingru, Malte Plidschun, Markus A. Schmidt, and Heinz-Siegfried Kitzerow. “Anchoring and Electro-Optic Switching of Liquid Crystals on Nano-Structured Surfaces Fabricated by Two-Photon Based Nano-Printing.” Optical Materials Express 13, no. 12 (2023). https://doi.org/10.1364/ome.503100. ieee: 'B. Zhang, M. Plidschun, M. A. Schmidt, and H.-S. Kitzerow, “Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing,” Optical Materials Express, vol. 13, no. 12, Art. no. 3467, 2023, doi: 10.1364/ome.503100.' mla: Zhang, Bingru, et al. “Anchoring and Electro-Optic Switching of Liquid Crystals on Nano-Structured Surfaces Fabricated by Two-Photon Based Nano-Printing.” Optical Materials Express, vol. 13, no. 12, 3467, Optica Publishing Group, 2023, doi:10.1364/ome.503100. short: B. Zhang, M. Plidschun, M.A. Schmidt, H.-S. Kitzerow, Optical Materials Express 13 (2023). date_created: 2023-12-13T15:59:37Z date_updated: 2023-12-13T16:06:29Z department: - _id: '313' - _id: '230' - _id: '35' doi: 10.1364/ome.503100 intvolume: ' 13' issue: '12' keyword: - Electronic - Optical and Magnetic Materials language: - iso: eng publication: Optical Materials Express publication_identifier: issn: - 2159-3930 publication_status: published publisher: Optica Publishing Group status: public title: Anchoring and electro-optic switching of liquid crystals on nano-structured surfaces fabricated by two-photon based nano-printing type: journal_article user_id: '254' volume: 13 year: '2023' ... --- _id: '40513' abstract: - lang: eng text: Geometric-phase dielectric meta-lenses made of silicon with high numerical aperture and short focal lengths are fabricated and characterised. For circularly polarised light, the same meta-lens can act as a converging or diverging lens, depending on the handedness of the circular polarisation. This effect enables application for optical tweezers that trap or release µm-size polymer beads floating in a microfluidic channel on demand. An electrically addressable polarisation converter based on liquid crystals may be used to switch between the two states of polarisation, at which the light transmitted through the meta-lens is focused (trapping) or defocussed (releasing), respectively. author: - first_name: René full_name: Geromel, René last_name: Geromel - first_name: Roman full_name: Rennerich, Roman last_name: Rennerich - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Heinz-Siegfried full_name: Kitzerow, Heinz-Siegfried id: '254' last_name: Kitzerow citation: ama: Geromel R, Rennerich R, Zentgraf T, Kitzerow H-S. Geometric-phase metalens to be used for tunable optical tweezers in microfluidics. Liquid Crystals. 2023;50(7-10):1193-1203. doi:10.1080/02678292.2023.2171146 apa: Geromel, R., Rennerich, R., Zentgraf, T., & Kitzerow, H.-S. (2023). Geometric-phase metalens to be used for tunable optical tweezers in microfluidics. Liquid Crystals, 50(7–10), 1193–1203. https://doi.org/10.1080/02678292.2023.2171146 bibtex: '@article{Geromel_Rennerich_Zentgraf_Kitzerow_2023, title={Geometric-phase metalens to be used for tunable optical tweezers in microfluidics}, volume={50}, DOI={10.1080/02678292.2023.2171146}, number={7–10}, journal={Liquid Crystals}, publisher={Taylor & Francis}, author={Geromel, René and Rennerich, Roman and Zentgraf, Thomas and Kitzerow, Heinz-Siegfried}, year={2023}, pages={1193–1203} }' chicago: 'Geromel, René, Roman Rennerich, Thomas Zentgraf, and Heinz-Siegfried Kitzerow. “Geometric-Phase Metalens to Be Used for Tunable Optical Tweezers in Microfluidics.” Liquid Crystals 50, no. 7–10 (2023): 1193–1203. https://doi.org/10.1080/02678292.2023.2171146.' ieee: 'R. Geromel, R. Rennerich, T. Zentgraf, and H.-S. Kitzerow, “Geometric-phase metalens to be used for tunable optical tweezers in microfluidics,” Liquid Crystals, vol. 50, no. 7–10, pp. 1193–1203, 2023, doi: 10.1080/02678292.2023.2171146.' mla: Geromel, René, et al. “Geometric-Phase Metalens to Be Used for Tunable Optical Tweezers in Microfluidics.” Liquid Crystals, vol. 50, no. 7–10, Taylor & Francis, 2023, pp. 1193–203, doi:10.1080/02678292.2023.2171146. short: R. Geromel, R. Rennerich, T. Zentgraf, H.-S. Kitzerow, Liquid Crystals 50 (2023) 1193–1203. date_created: 2023-01-27T12:42:16Z date_updated: 2023-12-13T15:56:05Z department: - _id: '313' - _id: '230' - _id: '638' doi: 10.1080/02678292.2023.2171146 intvolume: ' 50' issue: 7-10 language: - iso: eng page: 1193-1203 project: - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' publication: Liquid Crystals publisher: Taylor & Francis quality_controlled: '1' status: public title: Geometric-phase metalens to be used for tunable optical tweezers in microfluidics type: journal_article user_id: '254' volume: 50 year: '2023' ... --- _id: '43440' author: - first_name: Bingru full_name: Zhang, Bingru last_name: Zhang - first_name: Linh full_name: Nguyen, Linh last_name: Nguyen - first_name: Kevin full_name: Martens, Kevin last_name: Martens - first_name: Amelie full_name: Heuer-Jungemann, Amelie last_name: Heuer-Jungemann - first_name: Julian full_name: Philipp, Julian last_name: Philipp - first_name: Susanne full_name: Kempter, Susanne last_name: Kempter - first_name: Joachim O. full_name: Rädler, Joachim O. last_name: Rädler - first_name: Tim full_name: Liedl, Tim last_name: Liedl - first_name: Heinz-Siegfried full_name: Kitzerow, Heinz-Siegfried id: '254' last_name: Kitzerow citation: ama: Zhang B, Nguyen L, Martens K, et al. Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal. Liquid Crystals. 2023;50(7-10):1243-1251. doi:10.1080/02678292.2023.2188494 apa: Zhang, B., Nguyen, L., Martens, K., Heuer-Jungemann, A., Philipp, J., Kempter, S., Rädler, J. O., Liedl, T., & Kitzerow, H.-S. (2023). Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal. Liquid Crystals, 50(7–10), 1243–1251. https://doi.org/10.1080/02678292.2023.2188494 bibtex: '@article{Zhang_Nguyen_Martens_Heuer-Jungemann_Philipp_Kempter_Rädler_Liedl_Kitzerow_2023, title={Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal}, volume={50}, DOI={10.1080/02678292.2023.2188494}, number={7–10}, journal={Liquid Crystals}, publisher={Informa UK Limited}, author={Zhang, Bingru and Nguyen, Linh and Martens, Kevin and Heuer-Jungemann, Amelie and Philipp, Julian and Kempter, Susanne and Rädler, Joachim O. and Liedl, Tim and Kitzerow, Heinz-Siegfried}, year={2023}, pages={1243–1251} }' chicago: 'Zhang, Bingru, Linh Nguyen, Kevin Martens, Amelie Heuer-Jungemann, Julian Philipp, Susanne Kempter, Joachim O. Rädler, Tim Liedl, and Heinz-Siegfried Kitzerow. “Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic Chromonic Liquid Crystal.” Liquid Crystals 50, no. 7–10 (2023): 1243–51. https://doi.org/10.1080/02678292.2023.2188494.' ieee: 'B. Zhang et al., “Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal,” Liquid Crystals, vol. 50, no. 7–10, pp. 1243–1251, 2023, doi: 10.1080/02678292.2023.2188494.' mla: Zhang, Bingru, et al. “Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic Chromonic Liquid Crystal.” Liquid Crystals, vol. 50, no. 7–10, Informa UK Limited, 2023, pp. 1243–51, doi:10.1080/02678292.2023.2188494. short: B. Zhang, L. Nguyen, K. Martens, A. Heuer-Jungemann, J. Philipp, S. Kempter, J.O. Rädler, T. Liedl, H.-S. Kitzerow, Liquid Crystals 50 (2023) 1243–1251. date_created: 2023-04-08T17:21:30Z date_updated: 2023-12-13T15:54:31Z department: - _id: '313' - _id: '230' doi: 10.1080/02678292.2023.2188494 intvolume: ' 50' issue: 7-10 keyword: - Condensed Matter Physics - General Materials Science - General Chemistry language: - iso: eng page: 1243-1251 publication: Liquid Crystals publication_identifier: issn: - 0267-8292 - 1366-5855 publication_status: published publisher: Informa UK Limited status: public title: Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal type: journal_article user_id: '254' volume: 50 year: '2023' ... --- _id: '50012' abstract: - lang: eng text: Silicon photonics, in conjunction with complementary metal-oxide-semiconductor (CMOS) fabrication, has greatly enhanced the development of integrated optical phased arrays. This facilitates a dynamic control of light in a compact form factor that enables the synthesis of arbitrary complex wavefronts in the infrared spectrum. We numerically demonstrate a large-scale two-dimensional silicon-based optical phased array (OPA) composed of nanoantennas with circular gratings that are balanced in power and aligned in phase, required for producing elegant radiation patterns in the far-field. For a wavelength of 1.55 μm, we optimize two antennas for the OPA exhibiting an upward radiation efficiency as high as 90%, with almost 6.8% of optical power concentrated in the field of view. Additionally, we believe that the proposed OPAs can be easily fabricated and would have the ability to generate complex holographic images, rendering them an attractive candidate for a wide range of applications like LiDAR sensors, optical trapping, optogenetic stimulation, and augmented-reality displays. author: - first_name: Henna full_name: Farheen, Henna last_name: Farheen - first_name: Andreas full_name: Strauch, Andreas last_name: Strauch - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: '0000-0002-5950-6618 ' - first_name: Viktor full_name: Myroshnychenko, Viktor id: '46371' last_name: Myroshnychenko - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. Photonics and Nanostructures - Fundamentals and Applications. 2023;58:101207. doi:10.1016/j.photonics.2023.101207 apa: Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., & Förstner, J. (2023). Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. Photonics and Nanostructures - Fundamentals and Applications, 58, 101207. https://doi.org/10.1016/j.photonics.2023.101207 bibtex: '@article{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays}, volume={58}, DOI={10.1016/j.photonics.2023.101207}, journal={Photonics and Nanostructures - Fundamentals and Applications}, publisher={Elsevier BV}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2023}, pages={101207} }' chicago: 'Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” Photonics and Nanostructures - Fundamentals and Applications 58 (2023): 101207. https://doi.org/10.1016/j.photonics.2023.101207.' ieee: 'H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays,” Photonics and Nanostructures - Fundamentals and Applications, vol. 58, p. 101207, 2023, doi: 10.1016/j.photonics.2023.101207.' mla: Farheen, Henna, et al. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” Photonics and Nanostructures - Fundamentals and Applications, vol. 58, Elsevier BV, 2023, p. 101207, doi:10.1016/j.photonics.2023.101207. short: H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications 58 (2023) 101207. date_created: 2023-12-21T09:30:03Z date_updated: 2023-12-21T09:48:39Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' - _id: '58' doi: 10.1016/j.photonics.2023.101207 file: - access_level: open_access content_type: application/pdf creator: fossie date_created: 2023-12-21T09:34:17Z date_updated: 2023-12-21T09:34:17Z file_id: '50013' file_name: 2ß23-12 Farheen - PNFA - Optimized, highly efficient silicon antennas for optical phased arrays.pdf file_size: 3339442 relation: main_file file_date_updated: 2023-12-21T09:34:17Z has_accepted_license: '1' intvolume: ' 58' keyword: - tet_topic_opticalantenna language: - iso: eng oa: '1' page: '101207' project: - _id: '266' grant_number: PROFILNRW-2020-067 name: 'PhoQC: PhoQC: Photonisches Quantencomputing' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Photonics and Nanostructures - Fundamentals and Applications publication_identifier: issn: - 1569-4410 publication_status: published publisher: Elsevier BV related_material: link: - relation: research_data url: https://doi.org/10.5281/zenodo.10044122 status: public title: Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays type: journal_article user_id: '158' volume: 58 year: '2023' ... --- _id: '48599' abstract: - lang: eng text: AbstractThe biexciton‐exciton emission cascade commonly used in quantum‐dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work, it focuses on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishability. It achieves this goal by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum‐dot cavity excitation dynamics with full access to photon properties. It reports non‐trivial dependencies on system parameters and use the predictive power of the combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values, here specifically for the telecom C‐band at 1550 nm. author: - first_name: David full_name: Bauch, David last_name: Bauch - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. Published online 2023. doi:10.1002/qute.202300142 apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. https://doi.org/10.1002/qute.202300142 bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, DOI={10.1002/qute.202300142}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }' chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies, 2023. https://doi.org/10.1002/qute.202300142. ieee: 'D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced Quantum Technologies, 2023, doi: 10.1002/qute.202300142.' mla: Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies, Wiley, 2023, doi:10.1002/qute.202300142. short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies (2023). date_created: 2023-11-03T10:07:38Z date_updated: 2023-12-21T10:41:17Z department: - _id: '61' - _id: '230' - _id: '429' - _id: '623' doi: 10.1002/qute.202300142 keyword: - tet_topic_qd language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142 oa: '1' project: - _id: '173' grant_number: '231447078' name: 'TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen (C09*)' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Advanced Quantum Technologies publication_identifier: issn: - 2511-9044 - 2511-9044 publication_status: published publisher: Wiley related_material: record: - id: '43246' relation: earlier_version status: public status: public title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs type: journal_article user_id: '158' year: '2023' ... --- _id: '43246' abstract: - lang: eng text: The biexciton-exciton emission cascade commonly used in quantum-dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work we focus on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishibility. We achieve this goal by selectively reducing the biexciton lifetime with an optical resonator. We demonstrate that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and two-fold degenerate optical modes. Our in-depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum-dot cavity excitation dynamics with full access to photon properties. We report non-trivial dependencies on system parameters and use the predictive power of our combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values in the telecom C-band at $1550\,\mathrm{nm}$. author: - first_name: David full_name: Bauch, David last_name: Bauch - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs. Published online 2023. apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023). On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs. bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }' chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs,” 2023. ieee: D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs.” 2023. mla: Bauch, David, et al. On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs. 2023. short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023). date_created: 2023-03-31T13:22:05Z date_updated: 2023-12-21T10:41:17Z department: - _id: '61' - _id: '230' - _id: '429' - _id: '623' - _id: '15' - _id: '35' - _id: '170' - _id: '297' keyword: - tet_topic_phc - tet_topic_qd language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/pdf/2303.13871.pdf oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '173' grant_number: '231447078' name: 'TRR 142 - C09: TRR 142 - Subproject C09' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Subproject B06' - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '56' name: 'TRR 142 - C: TRR 142 - Project Area C' related_material: record: - id: '48599' relation: later_version status: public status: public title: On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs type: preprint user_id: '16199' year: '2023' ... --- _id: '52122' article_number: '043152' 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. Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043152 apa: Ali, U., Holthaus, M., & Meier, T. (2023). Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. Physical Review Research, 5(4), Article 043152. https://doi.org/10.1103/physrevresearch.5.043152 bibtex: '@article{Ali_Holthaus_Meier_2023, title={Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice}, volume={5}, DOI={10.1103/physrevresearch.5.043152}, number={4043152}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Ali, Usman and Holthaus, Martin and Meier, Torsten}, year={2023} }' chicago: Ali, Usman, Martin Holthaus, and Torsten Meier. “Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043152. ieee: 'U. Ali, M. Holthaus, and T. Meier, “Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice,” Physical Review Research, vol. 5, no. 4, Art. no. 043152, 2023, doi: 10.1103/physrevresearch.5.043152.' mla: Ali, Usman, et al. “Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice.” Physical Review Research, vol. 5, no. 4, 043152, American Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043152. short: U. Ali, M. Holthaus, T. Meier, Physical Review Research 5 (2023). date_created: 2024-02-27T13:57:01Z date_updated: 2024-02-28T12:53:40Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.1103/physrevresearch.5.043152 intvolume: ' 5' issue: '4' keyword: - General Physics and Astronomy language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice type: journal_article user_id: '16199' volume: 5 year: '2023' ... --- _id: '52124' author: - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 citation: ama: Meier T. Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice. LibreCat University; 2023. doi:10.5281/ZENODO.10245499 apa: Meier, T. (2023). Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. LibreCat University. https://doi.org/10.5281/ZENODO.10245499 bibtex: '@book{Meier_2023, title={Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice}, DOI={10.5281/ZENODO.10245499}, publisher={LibreCat University}, author={Meier, Torsten}, year={2023} }' chicago: Meier, Torsten. Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice. LibreCat University, 2023. https://doi.org/10.5281/ZENODO.10245499. ieee: T. Meier, Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. LibreCat University, 2023. mla: Meier, Torsten. Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice. LibreCat University, 2023, doi:10.5281/ZENODO.10245499. short: T. Meier, Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice, LibreCat University, 2023. date_created: 2024-02-27T14:01:59Z date_updated: 2024-02-28T12:52:08Z department: - _id: '15' - _id: '170' - _id: '293' - _id: '230' doi: 10.5281/ZENODO.10245499 publisher: LibreCat University status: public title: Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice type: research_data user_id: '16199' year: '2023' ... --- _id: '28413' abstract: - lang: eng text: Optical traveling wave antennas offer unique opportunities to control and selectively guide light into a specific direction, which renders them excellent candidates for optical communication and sensing. These applications require state-of-the-art engineering to reach optimized functionalities such as high directivity and radiation efficiency, low sidelobe levels, broadband and tunable capabilities, and compact design. In this work, we report on the numerical optimization of the directivity of optical traveling wave antennas made from low-loss dielectric materials using full-wave numerical simulations in conjunction with the particle swarm optimization algorithm. The antennas are composed of a reflector and a director deposited on a glass substrate, and an emitter placed in the feed gap between them serves as an internal source of excitation. In particular, we analyze antennas with rectangular- and horn-shaped directors made of either hafnium dioxide or silicon. The optimized antennas produce highly directional emissions due to the presence of two dominant guided TE modes in the director in addition to leaky modes. These guided modes dominate the far-field emission pattern and govern the direction of the main lobe emission, which predominately originates from the end facet of the director. Our work also provides a comprehensive analysis of the modes, radiation patterns, parametric influences, and bandwidths of the antennas, which highlights their robust nature. author: - first_name: Henna full_name: Farheen, Henna last_name: Farheen - first_name: Till full_name: Leuteritz, Till last_name: Leuteritz - first_name: Stefan full_name: Linden, Stefan last_name: Linden - first_name: Viktor full_name: Myroshnychenko, Viktor id: '46371' last_name: Myroshnychenko - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: Farheen H, Leuteritz T, Linden S, Myroshnychenko V, Förstner J. Optimization of optical waveguide antennas for directive emission of light. Journal of the Optical Society of America B. 2022;39(1):83. doi:10.1364/josab.438514 apa: Farheen, H., Leuteritz, T., Linden, S., Myroshnychenko, V., & Förstner, J. (2022). Optimization of optical waveguide antennas for directive emission of light. Journal of the Optical Society of America B, 39(1), 83. https://doi.org/10.1364/josab.438514 bibtex: '@article{Farheen_Leuteritz_Linden_Myroshnychenko_Förstner_2022, title={Optimization of optical waveguide antennas for directive emission of light}, volume={39}, DOI={10.1364/josab.438514}, number={1}, journal={Journal of the Optical Society of America B}, author={Farheen, Henna and Leuteritz, Till and Linden, Stefan and Myroshnychenko, Viktor and Förstner, Jens}, year={2022}, pages={83} }' chicago: 'Farheen, Henna, Till Leuteritz, Stefan Linden, Viktor Myroshnychenko, and Jens Förstner. “Optimization of Optical Waveguide Antennas for Directive Emission of Light.” Journal of the Optical Society of America B 39, no. 1 (2022): 83. https://doi.org/10.1364/josab.438514.' ieee: 'H. Farheen, T. Leuteritz, S. Linden, V. Myroshnychenko, and J. Förstner, “Optimization of optical waveguide antennas for directive emission of light,” Journal of the Optical Society of America B, vol. 39, no. 1, p. 83, 2022, doi: 10.1364/josab.438514.' mla: Farheen, Henna, et al. “Optimization of Optical Waveguide Antennas for Directive Emission of Light.” Journal of the Optical Society of America B, vol. 39, no. 1, 2022, p. 83, doi:10.1364/josab.438514. short: H. Farheen, T. Leuteritz, S. Linden, V. Myroshnychenko, J. Förstner, Journal of the Optical Society of America B 39 (2022) 83. date_created: 2021-12-08T07:14:39Z date_updated: 2022-01-06T06:58:04Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1364/josab.438514 file: - access_level: local content_type: application/pdf creator: fossie date_created: 2021-12-08T08:26:57Z date_updated: 2021-12-08T08:26:57Z embargo: 2022-12-08 embargo_to: open_access file_id: '28417' file_name: 2021-12 Farheen - JOSA B - Optimization of optical nanoantennas.pdf file_size: 14029741 relation: main_file - access_level: open_access content_type: application/pdf creator: fossie date_created: 2021-12-08T08:29:49Z date_updated: 2021-12-08T08:29:49Z file_id: '28418' file_name: 2021-12 Farheen - JOSA B - Optimization of optical nanoantennas SUPPLEMENTARY MATERIAL.pdf file_size: 655495 relation: supplementary_material file_date_updated: 2021-12-08T08:29:49Z has_accepted_license: '1' intvolume: ' 39' issue: '1' keyword: - tet_topic_opticalantenna language: - iso: eng oa: '1' page: '83' project: - _id: '53' name: TRR 142 - _id: '56' name: TRR 142 - Project Area C - _id: '75' name: TRR 142 - Subproject C5 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Journal of the Optical Society of America B publication_identifier: issn: - 0740-3224 - 1520-8540 publication_status: published status: public title: Optimization of optical waveguide antennas for directive emission of light type: journal_article user_id: '158' volume: 39 year: '2022' ... --- _id: '29075' abstract: - lang: eng text: We study a double-scattering coherent mechanism of negative polarization (NP) near opposition that is observed for powder-like surfaces. The problem is solved numerically for absorbing structures with irregular constituents, cubes, spheres, and ellipsoids larger than the wavelength of incident light. Our simulations show that double scattering between two random irregular particles shows weak NP. Adding one more particle significantly increases the relative contribution of double scattering which enhances NP. Simulations with regular shapes and controlled geometric parameters show that the interference mechanism is sensitive to the geometry of the scattering system and can also result in no polarization or even strong enhancement of positive polarization at backscattering. author: - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Henna full_name: Farheen, Henna last_name: Farheen - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: Alhaddad S, Grynko Y, Farheen H, Förstner J. Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles. Optics Letters. 2022;47(1):58. doi:10.1364/ol.444953 apa: Alhaddad, S., Grynko, Y., Farheen, H., & Förstner, J. (2022). Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles. Optics Letters, 47(1), 58. https://doi.org/10.1364/ol.444953 bibtex: '@article{Alhaddad_Grynko_Farheen_Förstner_2022, title={Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles}, volume={47}, DOI={10.1364/ol.444953}, number={1}, journal={Optics Letters}, author={Alhaddad, Samer and Grynko, Yevgen and Farheen, Henna and Förstner, Jens}, year={2022}, pages={58} }' chicago: 'Alhaddad, Samer, Yevgen Grynko, Henna Farheen, and Jens Förstner. “Numerical Analysis of the Coherent Mechanism Producing Negative Polarization at Backscattering from Systems of Absorbing Particles.” Optics Letters 47, no. 1 (2022): 58. https://doi.org/10.1364/ol.444953.' ieee: 'S. Alhaddad, Y. Grynko, H. Farheen, and J. Förstner, “Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles,” Optics Letters, vol. 47, no. 1, p. 58, 2022, doi: 10.1364/ol.444953.' mla: Alhaddad, Samer, et al. “Numerical Analysis of the Coherent Mechanism Producing Negative Polarization at Backscattering from Systems of Absorbing Particles.” Optics Letters, vol. 47, no. 1, 2022, p. 58, doi:10.1364/ol.444953. short: S. Alhaddad, Y. Grynko, H. Farheen, J. Förstner, Optics Letters 47 (2022) 58. date_created: 2021-12-21T13:49:29Z date_updated: 2022-01-06T06:58:46Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1364/ol.444953 file: - access_level: local content_type: application/pdf creator: fossie date_created: 2021-12-21T13:53:47Z date_updated: 2021-12-21T13:53:47Z embargo: 2022-12-21 embargo_to: open_access file_id: '29076' file_name: 2022-01 Alhaddad - Optics Letter - Double Scattering.pdf file_size: 3197213 relation: main_file file_date_updated: 2021-12-21T13:53:47Z has_accepted_license: '1' intvolume: ' 47' issue: '1' keyword: - tet_topic_scattering language: - iso: eng page: '58' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Optics Letters publication_identifier: issn: - 0146-9592 - 1539-4794 publication_status: published status: public title: Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles type: journal_article user_id: '158' volume: 47 year: '2022' ... --- _id: '26747' abstract: - lang: eng text: Metasurfaces provide applications for a variety of flat elements and devices due to the ability to modulate light with subwavelength structures. The working principle meanwhile gives rise to the crucial problem and challenge to protect the metasurface from dust or clean the unavoidable contaminants during daily usage. Here, taking advantage of the intelligent bioinspired surfaces which exhibit self-cleaning properties, a versatile dielectric metasurface benefiting from the obtained superhydrophilic or quasi-superhydrophobic states is shown. The design is realized by embedding the metasurface inside a large area of wettability supporting structures, which is highly efficient in fabrication, and achieves both optical and wettability functionality at the same time. The superhydrophilic state enables an enhanced optical response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated between these two wettability or functional states by appropriate treatments in a repeatable way, without degrading the optical performance. The proposed design strategy will bring new opportunities to smart metasurfaces with improved optical performance, versatility, and physical stability. article_number: '2101781' article_type: original author: - first_name: Jinlong full_name: Lu, Jinlong last_name: Lu - first_name: Basudeb full_name: Sain, Basudeb last_name: Sain - first_name: Philip full_name: Georgi, Philip last_name: Georgi - first_name: Maximilian full_name: Protte, Maximilian last_name: Protte - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: Lu J, Sain B, Georgi P, Protte M, Bartley T, Zentgraf T. A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response. Advanced Optical Materials. 2022;10(1). doi:10.1002/adom.202101781 apa: Lu, J., Sain, B., Georgi, P., Protte, M., Bartley, T., & Zentgraf, T. (2022). A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response. Advanced Optical Materials, 10(1), Article 2101781. https://doi.org/10.1002/adom.202101781 bibtex: '@article{Lu_Sain_Georgi_Protte_Bartley_Zentgraf_2022, title={A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response}, volume={10}, DOI={10.1002/adom.202101781}, number={12101781}, journal={Advanced Optical Materials}, publisher={Wiley}, author={Lu, Jinlong and Sain, Basudeb and Georgi, Philip and Protte, Maximilian and Bartley, Tim and Zentgraf, Thomas}, year={2022} }' chicago: Lu, Jinlong, Basudeb Sain, Philip Georgi, Maximilian Protte, Tim Bartley, and Thomas Zentgraf. “A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response.” Advanced Optical Materials 10, no. 1 (2022). https://doi.org/10.1002/adom.202101781. ieee: 'J. Lu, B. Sain, P. Georgi, M. Protte, T. Bartley, and T. Zentgraf, “A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response,” Advanced Optical Materials, vol. 10, no. 1, Art. no. 2101781, 2022, doi: 10.1002/adom.202101781.' mla: Lu, Jinlong, et al. “A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response.” Advanced Optical Materials, vol. 10, no. 1, 2101781, Wiley, 2022, doi:10.1002/adom.202101781. short: J. Lu, B. Sain, P. Georgi, M. Protte, T. Bartley, T. Zentgraf, Advanced Optical Materials 10 (2022). date_created: 2021-10-25T06:34:38Z date_updated: 2022-02-28T08:26:45Z ddc: - '530' department: - _id: '15' - _id: '230' - _id: '289' doi: 10.1002/adom.202101781 file: - access_level: closed content_type: application/pdf creator: zentgraf date_created: 2021-10-25T06:42:52Z date_updated: 2021-10-25T06:42:52Z file_id: '26748' file_name: AdvOptMat_Lu_2021.pdf file_size: 2801333 relation: main_file success: 1 file_date_updated: 2021-10-25T06:42:52Z has_accepted_license: '1' intvolume: ' 10' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/10.1002/adom.202101781 oa: '1' publication: Advanced Optical Materials publication_identifier: issn: - 2195-1071 - 2195-1071 publication_status: published publisher: Wiley quality_controlled: '1' status: public title: A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response type: journal_article user_id: '30525' volume: 10 year: '2022' ... --- _id: '30195' abstract: - lang: eng text: While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often, symmetry effects are utilized to obtain particular optical responses. By breaking certain spatial symmetries, chiral structures arise and provide robust chiroptical responses to these plasmonic resonances. Here, we observe strong chiroptical responses in the linear and nonlinear optical regime for chiral L-handed helicoid-III nanoparticles and quantify them by means of an asymmetric factor, the so-called g-factor. We calculate the linear optical g-factors for two distinct chiroptical resonances to −0.12 and –0.43 and the nonlinear optical g-factors to −1.45 and −1.63. The results demonstrate that the chirality of the helicoid-III nanoparticles is strongly enhanced in the nonlinear regime. article_type: original author: - first_name: Florian full_name: Spreyer, Florian last_name: Spreyer - first_name: Jungho full_name: Mun, Jungho last_name: Mun - first_name: Hyeohn full_name: Kim, Hyeohn last_name: Kim - first_name: Ryeong Myeong full_name: Kim, Ryeong Myeong last_name: Kim - first_name: Ki Tae full_name: Nam, Ki Tae last_name: Nam - first_name: Junsuk full_name: Rho, Junsuk last_name: Rho - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: Spreyer F, Mun J, Kim H, et al. Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles. ACS Photonics. 2022;9(3):784–792. doi:10.1021/acsphotonics.1c00882 apa: Spreyer, F., Mun, J., Kim, H., Kim, R. M., Nam, K. T., Rho, J., & Zentgraf, T. (2022). Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles. ACS Photonics, 9(3), 784–792. https://doi.org/10.1021/acsphotonics.1c00882 bibtex: '@article{Spreyer_Mun_Kim_Kim_Nam_Rho_Zentgraf_2022, title={Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles}, volume={9}, DOI={10.1021/acsphotonics.1c00882}, number={3}, journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Spreyer, Florian and Mun, Jungho and Kim, Hyeohn and Kim, Ryeong Myeong and Nam, Ki Tae and Rho, Junsuk and Zentgraf, Thomas}, year={2022}, pages={784–792} }' chicago: 'Spreyer, Florian, Jungho Mun, Hyeohn Kim, Ryeong Myeong Kim, Ki Tae Nam, Junsuk Rho, and Thomas Zentgraf. “Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles.” ACS Photonics 9, no. 3 (2022): 784–792. https://doi.org/10.1021/acsphotonics.1c00882.' ieee: 'F. Spreyer et al., “Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles,” ACS Photonics, vol. 9, no. 3, pp. 784–792, 2022, doi: 10.1021/acsphotonics.1c00882.' mla: Spreyer, Florian, et al. “Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles.” ACS Photonics, vol. 9, no. 3, American Chemical Society (ACS), 2022, pp. 784–792, doi:10.1021/acsphotonics.1c00882. short: F. Spreyer, J. Mun, H. Kim, R.M. Kim, K.T. Nam, J. Rho, T. Zentgraf, ACS Photonics 9 (2022) 784–792. date_created: 2022-03-03T07:18:18Z date_updated: 2022-03-21T07:48:27Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1021/acsphotonics.1c00882 external_id: arxiv: - arXiv:2202.13594 intvolume: ' 9' issue: '3' keyword: - Electrical and Electronic Engineering - Atomic and Molecular Physics - and Optics - Biotechnology - Electronic - Optical and Magnetic Materials language: - iso: eng main_file_link: - open_access: '1' url: https://pubs.acs.org/doi/full/10.1021/acsphotonics.1c00882 oa: '1' page: 784–792 publication: ACS Photonics publication_identifier: issn: - 2330-4022 - 2330-4022 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' related_material: link: - relation: research_paper url: https://pubs.acs.org/doi/full/10.1021/acsphotonics.1c00882 status: public title: Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles type: journal_article user_id: '30525' volume: 9 year: '2022' ... --- _id: '30385' abstract: - lang: eng text: AbstractTailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles. article_number: '1387' author: - first_name: B. full_name: Jonas, B. last_name: Jonas - first_name: D. full_name: Heinze, D. last_name: Heinze - first_name: E. full_name: Schöll, E. last_name: Schöll - first_name: P. full_name: Kallert, P. last_name: Kallert - first_name: T. full_name: Langer, T. last_name: Langer - first_name: S. full_name: Krehs, S. last_name: Krehs - first_name: A. full_name: Widhalm, A. last_name: Widhalm - first_name: K. D. full_name: Jöns, K. D. last_name: Jöns - first_name: D. full_name: Reuter, D. last_name: Reuter - first_name: S. full_name: Schumacher, S. last_name: Schumacher - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 citation: ama: Jonas B, Heinze D, Schöll E, et al. Nonlinear down-conversion in a single quantum dot. Nature Communications. 2022;13(1). doi:10.1038/s41467-022-28993-3 apa: Jonas, B., Heinze, D., Schöll, E., Kallert, P., Langer, T., Krehs, S., Widhalm, A., Jöns, K. D., Reuter, D., Schumacher, S., & Zrenner, A. (2022). Nonlinear down-conversion in a single quantum dot. Nature Communications, 13(1), Article 1387. https://doi.org/10.1038/s41467-022-28993-3 bibtex: '@article{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Schumacher_et al._2022, title={Nonlinear down-conversion in a single quantum dot}, volume={13}, DOI={10.1038/s41467-022-28993-3}, number={11387}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Jonas, B. and Heinze, D. and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, K. D. and Reuter, D. and Schumacher, S. and et al.}, year={2022} }' chicago: Jonas, B., D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications 13, no. 1 (2022). https://doi.org/10.1038/s41467-022-28993-3. ieee: 'B. Jonas et al., “Nonlinear down-conversion in a single quantum dot,” Nature Communications, vol. 13, no. 1, Art. no. 1387, 2022, doi: 10.1038/s41467-022-28993-3.' mla: Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications, vol. 13, no. 1, 1387, Springer Science and Business Media LLC, 2022, doi:10.1038/s41467-022-28993-3. short: B. Jonas, D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K.D. Jöns, D. Reuter, S. Schumacher, A. Zrenner, Nature Communications 13 (2022). date_created: 2022-03-21T07:34:33Z date_updated: 2022-03-21T07:37:22Z department: - _id: '15' - _id: '230' doi: 10.1038/s41467-022-28993-3 intvolume: ' 13' issue: '1' keyword: - General Physics and Astronomy - General Biochemistry - Genetics and Molecular Biology - General Chemistry language: - iso: eng publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Nonlinear down-conversion in a single quantum dot type: journal_article user_id: '606' volume: 13 year: '2022' ...