In the first half of March, the German Physical Society will hold its annual spring conferences in Mainz, Dresden, and Erlangen. The CiS Research Institute will present current research findings in the areas of defect-based light emitters in doped silicon, systematic comparisons of NV diamond materials, qubits in silicon-based quantum technology, and electromigration experiments through lectures and posters at Johannes Gutenberg University in Mainz and the Technical University of Dresden.
At the conference of the Atoms, Molecules, Quantum Optics, and Photonics (SAMOP) section at Johannes Gutenberg University Mainz, Dr. Philipp Kellner will discuss the topic “Some defects in silicon-based materials toward integrated silicon photonics.” In his presentation, he will examine defect-based light emitters in doped silicon, describe fabrication methods and photoluminescence spectra, and utilize Abbe-limited optical microscopy for imaging. His presentation will take place on Thursday, 6th March 2026, starting at 11:30 in the Solid State Systems session.
The Condensed Matter Section will meet at the Technical University of Dresden from 8th-13th March 2026. The CiS Research Institute will be represented at this conference with three presentations.
On Tuesday, 10th March 2026, Kai Kühnlenz will open the session “Crystal Defects and Real Structure Physics in Diamond and Functional Materials I” (FM7) with his presentation at 9:30. He will report on the results of “Fluorescence lifetime measurements of NV- and NV0 color center ensembles at room temperature and 4K in HPHT, CVD, and nanodiamond samples.” A measurement approach will be presented that enables a systematic comparison of NV diamond materials. This forms the basis for a quantitative, lifetime-based characterization of NV ensembles.
The focus of Dr. Kevin Lauer’s presentation is on defects from the category of acceptor-interstitial silicon defects (ASi-Sii) as promising candidates for qubits in silicon-based quantum technology. His presentation, “Understanding optically detected magnetic resonance (ODMR) of InSi-Sii defects,” will take place on Wednesday, 11th March 2026, at 15:30 in the session “Materials and Devices for Quantum Technology I” (HL31).
In the poster session “Thin Films” on Thursday, 12th March 2026, at 18:30., Julia Baldauf will provide insight into research on electromigration in molybdenum disilicide. Her poster presentation, “Evolution of voids in molybdenum disilicide during electromigration experiments,” showcases the current state of research on voids generated by focused ion beams and the observation of these voids’ development during electromigration experiments, as well as excerpts from the determination of electromigration parameters using machine learning and the comparison with FEM simulations of a digital twin of the void.
The DPG’s spring meetings are among the largest physics conferences in Europe. Additionally, the working group “Physics, Modern IT, and Artificial Intelligence” is meeting in Dresden at the same time. This provides ideal opportunities for interdisciplinary discussions on the topic of AI, one of the DPG’s key communication focuses for 2026.
List of Presentations at DPG Conferences
1) Topic/Project: Some defects in silicon-based materials – toward integrated silicon photonics
Contribution: Lecture
Author(s)/Participant(s): Philipp Kellner, Bernd Hähnlein, Kevin Lauer, Christian Möller, Kai Kühnlenz, Mario Bähr, and Thomas Ortlepp
Person in charge: Philipp Kellner
Date/Session: Donnerstag, 06.03.2026, 11:30 Uhr, Q73 Solid State Systems
Place: Mainz
2) Topic/Project: Fluorescence lifetime measurements of NV- and NV0 color center ensembles at room temperature and 4K in HPHT, CVD and nanodiamond samples
Contribution: Lecture
Author(s)/Participant(s): Kai Kühnlenz, Kevin Lauer, Phillip Kellner, Mario Bähr, Andreas T. Winzer, and Thomas Ortlepp
Person in charge: Kai Kühnlenz
Date/Session: Dienstag, 10.03.2026, 09:30 Uhr, FM7 Crystal defects and real structure physics in diamond and functional materials
Place: Dresden
3) Topic/Project: Understanding optically detected magnetic resonance (ODMR) of InSi-Sii-defects
Contribution: Lecture
Author(s)/Participant(s): Kevin Lauer, Bernd Hähnlein, Mario Bähr, Kai Kühnlenz, Philipp Kellner, Dirk Schulze, Stefan Krischok, Alexander Rolapp, Christian Möller, and Thomas Ortlepp
Person in charge: Kevin Lauer
Date/Session: Mittwoch, 11.03.2026, 15:30 Uhr, HL31 Materials and Devices for Quantum Technology I
Place: Dresden
4) Topic/Project: Evolution of voids in molybdenum disilicide during electromigration experiments
Contribution: Poster
Author(s)/Participant(s): Julia Baldauf, Dennis Mitrenga, Tim Fink, and Philipp Kellner
Person in charge: Julia Baldauf
Date/Session: Donnerstag, 12.03.2026, 18:30 Uhr, DS20 Dünne Schichten Poster-Session
Place: Dresden
