Research interest
- Melt and flux growth of oxides and fluorides for optical, piezoelectric and laser crystals, and as substrates for novel electronic devices.
- Growth and characterization of wide-bandgap semiconductor bulk crystals. These crystals are used as substrate material in semiconductor technology.
- Growth and characterization technologies, correlation between preparation and properties of bulk single crystals in a general sense.
German Association for Crystal Growth - Member since 2010Co-chair of the focus group "Crystals for photonic applications" since 2023
Scientific network of the non-university research institutions in Berlin AdlershofMember of the board since 2015
Co-founder and Associate Member of Berlin Research 50
2026 E-MRS Fall Meeting and ExhibitWarsaw, Sept 14 to 17, 2026
Symposium E Co-Organizer
"Wide and Ultra-Wide-Bandgap Semiconductors Challenges: From Materials to Applications"
International Workshop on Nitride Semiconductors 2026Kumamoto, Japan, 8.-13. Nov. 2026
Program committee member
9th European Conference on Crystal Growth (ECCG-9)
5th European School on Crystal Growth (ESCG-5)
Berlin/Potsdam, July 2027
Co-Organizer
5th European School on Crystal Growth (ESCG-5)
Berlin/Potsdam, July 2027
Co-Organizer
Read my Book chapter on AlN bulk crystal growth in III-Nitride Ultraviolet Emitters, Springer Verlag 2016
Read my book chapter on bulk crystal growth of SiC and AlN in the Elsevier Handbook of Crystal Growth, 2nd Ed., Vol. 2A
Journal of Crystal GrowthEditor since 2020
Progress in Crystal Growth and Characterization of MaterialsAssoc. Editor since 2014
Recent publications and drafts:
- Bulk Rutile-GeO2 Single Crystals and Epi-ready Wafers Cryst. Res. Technol. (2026) in press
- Wide Bandgap Materials for Next-Generation Power Devices: Progress on AIN and beta-Ga2O3 Crystal Growth and Epitaxy at IKZ IEEE (2025) 12th Workshop on Wide Bandgap Power Devices & Applications (WiPDA), Fayetteville, AR, USA, 2025
- Structural and Optical Characterization of Highly Homogeneous Lithium Niobate Tantalate Single-Crystal Solid Solutions J. Crystal Growth 676 (2026) 128422
- Incorporation of Divalent Transition-Metal Ions in Bulk In2O3 Single Crystals Grown From the Melt and Their Impact on Optical and Electrical Properties J. Appl. Phys. 138 (2025) 025104
- Prediction of Impurity Concentrations by Absorption Spectra in AlN Single Crystals Using Random Forest Regression CrystEngComm 27 (2025) 184-190
- Bulk Single Crystals and Physical Properties of Rutile-GeO2 for High Power Electronics and DUV Optoelectronics Phys. Status Solidi B 262 (2025) 2400326
- Solid-Solution Limits and Thorough Characterization of Bulk β-(AlxGa1-x)2O3 Single Crystals Grown by the Czochralski Method Adv. Mater. Interfaces 12 (2025) 2400122
- Thermal Conductivity in Solid Solutions of Lithium Niobate Tantalate Single Crystals from 300K up to 1300K J. Alloys Compounds 1008 (2024) 176549
- Evaluation and Thermodynamic Optimization of Phase Diagram of Lithium Niobate Tantalate Solid Solutions J. Mater. Sci. 59 (2024) 12305-12316
- Efficient Diameter Enlargement of Bulk AlN Single Crystals with High Structural Quality Appl. Phys. Express 16 (2023) 075502
- Fanout Periodic Poling of BaMgF4 Crystals Opt. Mater. Express 13 [8] (2023) 2158-2164
Recent abstracts and presentations:
- Crystals and Substrates for Next-Generation Oxide Semiconductor Devices
Invited talk at the 50. International Conference and Expo on Advanced Ceramics and Composites (Symposium 14) (ICACC 2026)
in Daytona Beach, Florida, USA on Jan 25–30, 2026 - Growth of Bulk Oxide Crystals for Next-Generation Oxide Semiconductors
Presentation at the 14. German-French Workshop on Oxide, Dielectric, and Laser Crystals (WODIL 2025)
in Ettlingen on Sep 24–25, 2025 - IKZ - Modern Crystal Science & Technology in Times of Geopolitical Change
Presentation at the Seminar of Prof. Daniel Vizman, Fakulty of Physics at Western University
in Timisoara, Romania on Jul 23–24, 2025 - AlN and Ga2O3 Substrate Solutions for Next Generation Efficient Power Electronics Devices
Presentation at the Workshop on High Voltage Power Components For Defence
in ISL Saint-Louis, France on Jun 11, 2025 - Crystals and Substrates for Next-Generation Oxide Semiconductor Devices
Presentation at the Annual conference of the DGKK (DKT 2025)
Frankfurt on Mar 5-7, 2025
Conference organisation:
- 9. European Conference on Crystal Growth (ECCG-9),
Potsdam, Jul 25–29, 2027
(Conference Co-Chair and Co-Organizer) - International Workshop on Nitride Semiconductors 2026 (IWN 2026),
Kumamoto, Japan, Nov 8–13, 2026
(Member of the Program Committee) - European Materials Research Society Fall Meeting 2026 (Symposium E) (EMRS Fall 2026),
Warsaw, Poland, Sep 14–17, 2026
(Conference Chair and Chief Organizer Symposium E: Wide and Ultra-Wide-Bandgap Semiconductors Challenges: From Materials to Applications) - 9. International Workshop on Crystal Growth Technology (IWCGT-9),
Berlin, Jun 8–11, 2026
(Conference Chair and Chief Organizer) - Annual conference of the DGKK (DKT 2026),
Karlsruhe, Mar 4–6, 2026
(Member of the Program Committee) - 7. International Symposium on the Growth of Nitrides (ISGN-8),
Tainan, Taiwan, Nov 9–12, 2025
(Member of the Program Committee)