04.03.2025
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TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen,
Center for Optoelectronics and Photonics (CeOPP),
Institute for Photonic Quantum Systems (PhoQS)
In a collaboration between Paderborn University and Hallym University in South Korea, we developed a simple self-assembly based method to fabricate low density of dimer Au NPs on a metallic film over a large area of substrate by utilizing a virus-like biomaterial, M13 bacteriophage.
17.02.2025
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TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen,
Center for Optoelectronics and Photonics (CeOPP)
During the research stay of Prof. Lingling Huang from Beijing Institute of Technology in Paderborn, she gave an exciting and inspiring talk about optical metasurfaces. The research stay of Prof. Huang was supported by the Alexander von Humboldt Foundation.
25.11.2024
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TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen,
Center for Optoelectronics and Photonics (CeOPP)
Rebecca Aschwanden and Yves Köppeler spent a month at the Australian National University (ANU) in Canberra, Australia in the research group of Dr. Sergey Kruk.
13.11.2024
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TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen,
Center for Optoelectronics and Photonics (CeOPP),
Institute for Photonic Quantum Systems (PhoQS)
At the annual’s workshop of the TRR 142 that took place on 11 and 12 November 2024 in Bad Sassendorf the Best Poster Award, endowed with a travel grant, went to Michael Brauckmann, Emmanuel Narváez Castañeda, Dustin Siebert with their poster “Three-photon state generation with on-chip pump suppression in topological waveguides.” Congratulations to the winners!
During the visit of collaboration partner Prof. Nattaporn Chattham at Kasetsart University in Bangkok, interested PhD students had the opportunity to learn about the research activities in our group.
14.11.2023
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TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen,
Center for Optoelectronics and Photonics (CeOPP)
At this year's TRR142 workshop in Bad Sassendorf, René Geromel and Helene Wetter were awarded second and third prize for the best poster. We are delighted with this recognition of their achievements.
Inspired by the concept of horticultural plant grafting, the act of placing a part of one plant on a branch or root of another, grafted perfect vector vortex beams can be generated by grafting two or more phase profiles of grafted vortex beams on the same beam. The proposed hybrid grafted perfect vector vortex beams include two phase profiles with different concentric rings and combinations of topological charges. The bottom images show the concept of the metasurface and the generated phase mask together with a scanning electron microscopy image of the metasurface.
In our recent joint publication with Prof. Xianzhong Chen from Heriot-Watt University, UK, we demonstrated the creation of grafted perfect vector vortex beams using optical metasurfaces.
Safety always comes first and fires cannot be ruled out even in our laboratories. So we took advantage of the nice weather and conducted a fire safety drill again after a long time. This includes not only knowing how to behave in an emergency, but also how to use the fire extinguishers. Many thanks to Mr. Hohrath from Department 5 for the professional instruction.
Schematic design of the compact-pulse shaping device. The originally chirped laser pulse interacts with two metasurfaces (MS1 & MS2) between two silver mirrors. MS1 introduces angular dispersion and also focuses the light on MS2 which leads to a wavelength separation. At the second metasurface, wavelength-dependent phase information is applied and in addition, the beam is reflected back to MS1 before it leaves the device through the input aperture. Depending on the applied phase information on MS2, the pulse dispersion can be altered.
Material dispersion accumulated in optical setups tends to heavily distort and chirp ultra-short laser pulses which can be especially disadvantageous in nonlinear optical applications or pump-probe experiments. In our recent publication ‘Compact metasurface-based optical pulse-shaping device’ published in Nano Letters, we show that multiple metasurfaces on a single glass substrate can be used, to alter the dispersion of ultra-short laser pulses…
Our paper 'Multichannel vectorial holographic display and encryption' is selected as the ESI Top Paper in January 2023 in the Journal Light: Science&Applications (LSA) by SpringerNature. We are pleased that the paper makes an important contribution to new multiplexing methods in holography.
Physicist Prof. Dr. Lingling Huang has received the prestigious Friedrich Wilhelm Bessel Research Award from the Alexander von Humboldt Foundation. She was nominated by the Paderborn physicist Prof. Dr. Thomas Zentgraf.
Scientists at the University of Paderborn develop new technology for manipulating light. The research results are now published in the journal Nature Photonics.
