Physicists at Paderborn University have used complex computer simulations to develop a new design for significantly more efficient solar cells than previously available. A thin layer of organic material, known as tetracene, is responsible for the increase in efficiency. The results have now been published in the renowned journal "Physical Review Letters".

Topological states have shown prospect for bringing topological robustness into various applications and have been widely investigated in different physical systems and diverse types of lattice structures. Recently, Tobias Schneider and co-authors proposed a new type of lattice that contains two coupled cosinusoidal modulated potential chains (double-wave chains) as represented in (a) for the study of topological states in a planar semiconductor…

On-demand generation of high-quality photon states is key for implementing quantum information processing protocols. For high brightness deterministic photon sources, such as semiconductor quantum dots placed inside an optical resonator, emitter re-excitation is one of the problems undermining the quality of generated photons.

On 7 and 8 December 2023, Paderborn University hosted the 9th international workshop on Engineering of Quantum Emitter Properties (EQEP).

Scientists at Paderborn University are working with Atrineo AG to set up an extracurricular meeting and educational centre for quantum technologies as part of the joint project "Introducing Generation Z to the quantum physics mindset" (HedwiQ). The so-called Generation Z predominantly refers to young adults who were born between 1997 and 2012. The project, which is being funded by the Federal Ministry of Education and Research (BMBF) for a period…

Quantum emitters that produce both indistinguishable and polarization-entangled photons are essential prerequisites for photon-based quantum information processing.

With over ninety participants from the various TRR 142 scientific groups, this year's TRR 142 workshop was the largest to date. On 6 + 7 November 2023, the scientists presented their research results from the past year and exchanged ideas with invited guest scientists on the latest developments in the field of nonlinear photonics.

From 1 January 2024, Prof Dr Thomas Zentgraf will be the new spokesperson of the CRC TRR 142. The TRR 142-management board unanimously elected the experienced and renowned researcher in the field of ultrafast nanophotonics at Paderborn University (UPB).

Am 10. und 11. Oktober fand erstmalig die Quantum Effects statt. Mit mehr als 2000 Besucher*innen war die Premiere der Fachmesse für Quantentechnologien ein voller Erfolg. An zwei Messetagen waren auf dem Gelände der Messe Stuttgart mehr als 70 Ausstellende vor Ort. Begleitet wurde die Messe von einem Rahmenprogramm aus fachwissenschaftlichen Vorträgen, Expertendiskussionen und Workshops für Schüler*innen. So diente die Fachmesse nicht nur einer…

A constantly changing world requires profound scientific and technological knowledge. And science does not need international or gender boundaries. Therefore, we need to work hard on excellent research in an inclusive environment. On September 19 and 20, 2023, young scientists of the CRC TRR 142 and guests were invited to present their current research as well as to reflect on career paths within sciences – and what it needs to overcome our…

In einem sehr anschaulichen Video zeigt Nina Lange, wie Laserlicht einer gewünschten Farbe erzeugt werden kann. Über den sogenannnten Prozess der Summenfrequenzerzeugung wird in einem nichtlinearen Wellenleiter Licht generiert, das die für weiterführende Experimente geforderte Wellenlänge aufweist. Der Beitrag wurde auf den Social Media-Kanälen der Arbeitsgruppe Mesoskopische Quantenoptik veröffentlicht und kann zum Beispiel über diesen Link auf…

On August 3, 2023, Dr. Alexander Trautmann successfully defended his dissertation on: „Microscopic analysis of the nonlinear optical response of semiconductors: Carrier dynamics in extremely intense Terahertz fields and many-body correlations in type-II heterostructures”. Congratulations, Alexander!

Imagine two photons, the smallest quanta of light, meeting at a glass plate which transmits 50% of the light and reflects the other 50%. These two photons can take 4 different paths; either both photons are reflected or transmitted or one photon is reflected and the other one transmitted or vice versa.

With her laudatory speech at the ZEISS Research Award ceremony, Prof. Dr. Christine Silberhorn honoured outstanding research achievements in the fields of optics and photonics. ZEISS presented two research awards to a total of four scientists at a ceremony at the Deutsches Museum in Munich on 27 June.

Professor Klaus Jöns, a physicist at Paderborn University, was recently appointed a new fellow at the Max Planck School of Photonics. Jöns is the third Paderborn fellow at this renowned graduate school, alongside Professor Christine Silberhorn and Professor Thomas Zentgraf. The Max Planck School of Photonics (MPSP) is funded by the German Federal Ministry of Education and Research (BMBF) and offers an international and interdisciplinary master’s…

Professor Christine Silberhorn has been selected as a finalist for the Falling Walls Science Breakthroughs of the Year 2023 in the category Physical Sciences with her breakthrough on “Feed forward and time-multiplexing: the missing ingredients for photonic quantum technologies”. Congratulations!

Paderborner Forscher*innen aus dem Department Physik und vom Institut für Photonische Quantensysteme (PhoQS) haben im Rahmen eines innerhalb des Sonderforschungsbereichs/TRR 142 geförderten Projekts erfolgreich Quantenpunkte – nanoskopische Strukturen, in denen die Quanteneigenschaften der Materie zum Tragen kommen – hergestellt, die im optischen C-Band bei einer Wellenlänge zwischen 1530 bis 1565 Nanometer leuchten. Das Besondere ist, dass es…

When matter is exposed to highly intense electromagnetic radiation, nonlinearities of the material may lead to the emission of light that contains very high multiples of the incident frequency. This process is called high harmonic generation (HHG) and can be used for the generation of extremely short light pulses with durations in the range of attoseconds (in 1 attosecond, i.e., 10-18 s, light travels just 0.3 nanometer which is comparable to the…

This year's NRW Nano Conference - Germany's largest conference in the field of nanotechnologies - took place from 23 to 24 May. In the premises of the Dortmund Congress Centre, a top-class scientific programme was accompanied by a two-day exhibition. Around 40 players from science and industry presented forward-looking projects and products here. Overall, a thematic focus on the field of quantum technologies was clearly evident. The…