Abbe Center of Photonics

Last weekend, Jena hosted the first EFEQT Quantum Ideas Factory, where 40 Master’s and PhD students from across Europe spent three days innovating on a diverse range of interdisciplinary challenges in quantum technologies. These topics were proposed and guided by academic and industry partners from EFEQT and DIGIQ: - How to transform microwave qubits to telecom-compatible qubits? by Christophe Couteau - Reinforcement learning to initialize qubit states. by Marin Bukov - Training a physical system as a neural network by Clara Wanjura - Image an object with photoncs that never interacted with that object by Rene Sondenheimer - Pulse shaping and optimal control for quantum sensors based on atom interferometry by Cyrille Solaro - Hamiltonian learning using programmable quantum walks in a bosonic Hubbard model by Brice Bakkali-Hassani The event organization by Martin Gärttner was supported by the Abbe School of Photonics and LICHTWERKSTATT JENA – Open Photonics Makerspace.

The applications for the EMIMEP Master are now open. It is a great opportunity to learn skills in Electronics, Microwave and Photonics that you can apply to many fields. Why should you choose EMIMEP? 👍 Your fellow students are from different countries all over the world. You can make friends and share your experiences with them. 👍 The courses are taught in English. You will be able to communicate easily with your classmates and teachers. (Reminder: Don't forget to learn a little bit of the local language, it helps very much.) 👍 4 ERASMUS MUNDI Scholarships exclusively available for students from Albania, Bosnia-Herzegovina, Kosovo, Montenegro or North Macedonia. 👍 You will receive 1400 euros/month during your time in EMIMEP. This money will help you to focus on your studies. 👍 You will have the possibility to explore and study in four different countries such as Germany, Italy, Spain and France. You will be the one to decide where you want to study. APPLY NOW! Application Deadline: 12/03/2025 https://lnkd.in/e3F57Kza

#FysicsFunFact: Tuesday is as good as any day of the week for a fascinating #fysics read. Go treat yourself! #Monolayers are cool, but not always better. In https://lnkd.in/gAJVWX-V we show that MoTe2-#bilayers have a brighter telecom-IR emission than monolayers, when stuck in an optical cavity. This makes them interersting for telecom-wavelength single photon sources. Congrats to the - as usual - great work by Bo HAN who was leading this research team comprised of Jamie Fitzgerald, Lukas Lackner, Roberto Rosati, Martin Esmann, Takashi Taniguchi, Kenji Watanabe, Marcin Syperek, Ermin Malic and Christian Schneider. This is the result of a joint research initiative of Carl von Ossietzky Universität Oldenburg, Philipps-Universität Marburg, Fraunhofer IOF, Friedrich-Schiller-Universität Jena, Abbe Center of Photonics, Max Planck School of Photonics, National Institute for Materials Science, and Wrocław University of Science and Technology. On the Jena side this work was supported by Jena Micro-& Nanophotonics, the #CRC1375 #NOA of the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation and grants 16KISQ087K and 13XP5053A of the Bundesministerium für Bildung und Forschung (Quantensysteme).

Wahlen sind das Fundament unserer Demokratie und es ist unser Privileg, wählen zu können. Also macht am 23. Februar von eurem Wahlrecht Gebrauch. Jede Stimme zählt! 🗳️ #Zusammenland ist eine Initiative von ZEIT Verlagsgruppe, Süddeutsche Zeitung, Handelsblatt, Tagesspiegel und WirtschaftsWoche, die von rund 800 Hochschulen, Unternehmen, Stiftungen und Verbänden unterstützt wird. Auch die Uni Jena ist dabei – denn gemeinsam sind wir stärker. 🦾 #UniJena #Bundestagswahl #btw25 #Demokratie #ZukunftGestalten #GehtWählen #DeineStimmeZählt

Jena ist bunt und Thüringen ist weltoffen. Alle, die wollen, dass das so bleibt, können das heute am Freitag, 31. Januar, ab 17 Uhr auf dem Holzmarkt kundtun. 🏳️🌈 #ThueringenWeltoffen #UniJena #Vielfalt #Freiheit #Demokratie

"Disorder" often carries a negative connotation in everyday language. You might associate this word with chaos, disorganization, or messiness. But what if controlled "disorder" could be harnessed to manipulate light in a precise and desired way? In photonics, disordered structures are typically seen as a drawback, causing unwanted scattering, spectral broadening, or energy loss. However, our recent research demonstrated that tailored disorder can revolutionise nanoscale photonic systems. By introducing controlled orientational disorder into silicon nanostructures, we created a system that maintains pure circular "eigenpolarizations" of light over a broad range of wavelengths and angles. Simply put, this allows us to precisely control how light’s polarization is shaped, unlocking new possibilities for broadband and angle-tolerant nanoscale optical devices. This breakthrough enables robust, miniaturized components—such as circular polarizers, beam splitters, and polarization shapers—that retain exceptional polarization-shaping performance across varying wavelengths and angles. Our work challenges traditional views of disorder and shows that with careful design, what seems chaotic can lead to extraordinary outcomes in photonics. Here you can find the article published online today in Advanced Optical Materials! : https://lnkd.in/etr2ZvJv I want to extend my deepest gratitude for the significant contributions to this work by Dr. Aso Rahimzadegan, Dr. Dennis Arslan, Fitriana Anna, Stefan Fasold, Dr. Dmitry Pidgayko, Michael Steinert, Prof. Dr. Thomas Pertsch, Dr. Manuel Decker, Prof. Dr. Carsten Rockstuhl, and Prof. Dr. Isabelle Staude. The experimental demonstration of this research was conducted at the Abbe Center of Photonics. #Photonics #Optics #Metasurfaces #Disorder #Chirality #MieResonances #Silicon #Nanophotonics

Do you like to loose? We don't. In particular no photons. We hence develop low loss, wafer scale single-mode waveguides in Lithium Niobate on Insulator (LNOI) with less than 2.7 dB/m (that's per meter!). Less than 6% crossing an entire wafer. See https://lnkd.in/e-tgffAS . #DreamYourPIC #NoPhotonsLeftBehind #PhotonicsWest The LNOI-PIC platform is a joint development of Fraunhofer IOF and Friedrich-Schiller-Universität Jena with support by Hochschule München. Congrats to Mohammadreza Younesi, Thomas Käsebier, Ilia Elmanov, Yang-Teng Li, Pawan Kumar, Reinhard Geiss, Thomas Siefke, Frank Setzpfandt, Uwe Zeitner, and Thomas Pertsch for this record breaking result.

#News | 𝗙𝗮𝗿𝗲𝘄𝗮𝗹𝗹 𝗚𝗮𝗶𝗮: 𝗝𝗲𝗻𝗮 𝗿𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗵𝗲𝗹𝗽𝘀 𝘀𝗵𝗮𝗽𝗶𝗻𝗴 𝗸𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲 𝗮𝗯𝗼𝘂𝘁 𝗼𝘂𝗿 𝗴𝗮𝗹𝗮𝘅𝘆 11 years, one trillion observations of two billion stars and a now nearly empty fuel tank later, the Gaia Mission of the European Space Agency - ESA comes to an end. Launched to map the positions, distances, movements, and many features of celestial bodies in our galaxy, Gaia has created the most detailed map of the Milky Way – our cosmic home. 🌌 One of the key instruments aboard the spacecraft is the “Radial Velocity Spectrometer.” Researchers at Fraunhofer IOF, in collaboration with the Institute for Applied Physics, developed a crucial component – a transmission grid for measuring redshift. This instrument has successfully endured extreme conditions, and with the data collected has fundamentally expanded our knowledge of the Milky Way. For the coming weeks, various technology tests are planned, before Gaia enters its “retirement” orbit. Science fans can still catch a glimpse of Gaia through small telescopes as we bid farewell to this remarkable mission. 🔭 🔗Read more about Fraunhofer IOF’s research and Gaia: https://lnkd.in/dhTbTerZ 📷 1/2: 𝘔𝘪𝘤𝘳𝘰𝘴𝘵𝘳𝘶𝘤𝘵𝘶𝘳𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘎𝘢𝘪𝘢 𝘵𝘳𝘢𝘯𝘴𝘮𝘪𝘴𝘴𝘪𝘰𝘯 𝘨𝘳𝘢𝘵𝘪𝘯𝘨. 𝘛𝘩𝘦 𝘨𝘳𝘢𝘵𝘪𝘯𝘨 𝘪𝘴 𝘱𝘢𝘳𝘵 𝘰𝘧 𝘵𝘩𝘦 “𝘙𝘢𝘥𝘪𝘢𝘭 𝘝𝘦𝘭𝘰𝘤𝘪𝘵𝘺 𝘚𝘱𝘦𝘤𝘵𝘳𝘰𝘮𝘦𝘵𝘦𝘳” 𝘰𝘯 𝘣𝘰𝘢𝘳𝘥 𝘵𝘩𝘦 𝘱𝘳𝘰𝘣𝘦. © 𝘍𝘳𝘢𝘶𝘯𝘩𝘰𝘧𝘦𝘳 𝘐𝘖𝘍 3: 𝘈𝘳𝘵𝘪𝘴𝘵'𝘴 𝘪𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘰𝘧 𝘎𝘢𝘪𝘢 𝘰𝘣𝘴𝘦𝘳𝘷𝘪𝘯𝘨 𝘵𝘩𝘦 𝘔𝘪𝘭𝘬𝘺 𝘞𝘢𝘺. © 𝘚𝘱𝘢𝘤𝘦𝘤𝘳𝘢𝘧𝘵: 𝘌𝘚𝘈/𝘈𝘛𝘎 𝘮𝘦𝘥𝘪𝘢𝘭𝘢𝘣; 𝘔𝘪𝘭𝘬𝘺 𝘞𝘢𝘺: 𝘌𝘚𝘈/𝘎𝘢𝘪𝘢/𝘋𝘗𝘈𝘊; 𝘊𝘊 𝘉𝘠-𝘚𝘈 3.0 𝘐𝘎𝘖. 𝘈𝘤𝘬𝘯𝘰𝘸𝘭𝘦𝘥𝘨𝘦𝘮𝘦𝘯𝘵: 𝘈. 𝘔𝘰𝘪𝘵𝘪𝘯𝘩𝘰.

In the last decade European Space Agency - ESA's #GAIA has quitely delivered us orders of magnitude more data about our Galaxy, than we had ever known before. It has lead to no less than 13000 (no typo!) scientific publications, a number which is set to grow further, as more then 500 TB of new data will be released at the end of the year. After a tremendous grind of 3 trillion observations over 11 years it has retired yesterday. Read more at https://lnkd.in/d29EPsYJ. Under the guidance of our members, Uwe Zeitner and Ernst-Bernhard Kley of Fraunhofer IOF and Friedrich-Schiller-Universität Jena, we had the privilege to contribute the RVS metasurface grating to the mission. This makes it the oldest and most productive #metasurface ever conceived by anyone. See https://lnkd.in/gCyZ6UDR if you are interested in the details. With its fuel all but spent, ESA will give GAIA another gentle push and move it from L2 into a heliocentric orbit. And, unless somebody in the future brings it back to put it in a museum, it will may stay there until the sun goes nova in a few billion years. Farewell!

Unser Thüringer Innovationszentrum InQuoSens setzt mit einem neuen Konzept für 2024–2029 auf Quanten-Photonische Integrierte Schaltkreise (Q-PICs). Diese strategische Weiterentwicklung stärkt sowohl das wissenschaftliche Profil als auch die wirtschaftliche Anwendung der Forschungsergebnisse. Der Europäische Fonds für regionale Entwicklung (EFRE) fördert das Projekt mit mehr als drei Millionen Euro. Danke dafür! 🙏 🇪🇺 #UniJena #EFRE #InQuoSens #Forschungsförderung #Anwendung #Photonik #Photonic #QPIC