Director of the Institute - Prof. Dr. Andreas Tünnermann

Andreas Tünnermann, Prof. Dr

Director of the Institute
Portrait Prof. Dr. Andreas Tünnermann
Image: Anne Günther (University of Jena)
IAP, Room 309
Albert-Einstein-Straße 15
07745 Jena Google Maps site planExternal link
  • Curriculum vitae

    Prof. Dr. rer. nat. habil. Andreas Tünnermann was born in Ahnsen, Germany, on June 10th, 1963. He received the diploma and Ph.D. degrees in physics from the University of Hannover in 1988 and 1992, respectively. His Ph.D. work was focused on nonlinear processes with emphasis on the interaction of high intensity laser sources with matter for the generation of short wavelengths lasers. In 1997 he recieved the habilitation for his work on ultrastable light sources for interferometric gravitational wave detectors.
    He was head of the department of development at the Laser Zentrum Hannover from 1992 to 1997. In 1994 he has become the national scientific coordinator for the topic diode pumped solid state lasers within the LASER 2000 programme. In the beginning of 1998 he joined the Friedrich Schiller University in Jena, Germany as a Professor and Director of the Institute of Applied Physics. In 2003 he became the Director of the Fraunhofer Institute of Applied Optics and Precision Engineering in Jena.

    Research and Teaching Career

    Andreas Tünnermann is currently leading one of the most creative and productive research groups in modern optics and photonics world-wide. His main research interests include scientific and technical aspects associated with the tailoring of light. Research topics are the design and manufacturing of novel passive and active photonic devices and its application for generation, amplification, steering and switching of light - with a strong foundation in laser physics. He exhibits a unique combination of considerable experience in optical system design and in the development of advanced light sources, including a profound knowledge about micro- and nano-optics. He enjoys an excellent reputation in the international optics and laser community in both, fundamental and applied physics. Especially his work on high power continuous and pulsed fiber lasers operating in the visible and near infrared spectral range is highly appreciated by the laser community. Outstanding developments in photonic crystal fiber design performed in his laboratories made it possible to overcome restrictions due to nonlinear pulse distortions in the amplification fiber and revealed the full potential of rare-earth-doped fibers as a power-scalable solid-state laser concept even in the ultrashort pulse regime. Andreas Tünnermann is also known for his pioneering work in utilizing high power femtosecond lasers for material processing. In collaboration with his coworkers he demonstrated new prospects for ultra precise laser based microstructure technology. Due to the rapid progress in this field, nowadays one starts to think about "real world" industrial applications of those ultrafast lasers.

    Andreas Tünnermann is actually involved in groundbreaking experiments in fundamental physics like the observation of gravitational waves applying laser interferometers but also in applied research activities with strong economic and ecological impact like the development of nano layers for photon managements in highly efficient thin film solar cells. The blend of experience and knowledge manifests itself in a work that has attracted and continues to attract considerable attention as proven by over 700 peer-reviewed publications in renown international journals (e.g. Nature Physics, Nature Photonics, Physical Review Letters, Optics Letters, Applied Optics, Applied Physics A+B and Optics Express), and more than 130 invited talks at most important national and international conferences, including plenary talks and tutorials - h-index= 83 (web of Knowledge 04/2020).
    Andreas Tünnermann has a strong record of inspiring the next generation of researchers. He has to date supervised 107 students to successful completion of PhD, currently he is supervising a further 12 PhD students. Of his former graduate students and post-docs, eleven have become full-professors, further three assistant professors.

    Interdisciplinary affiliation and administrative experience

    Andreas Tünnermann is providing service contributions to the discipline as a professional board and committee member as well as a reviewer of proposals or papers. In particular, he served as a member of the international council of the Optical society of America (OSA) and a board member of the European Physical Society (EPS); Quantum Electronics and Optics Division. He worked as a General Chair for conferences operated by EPS, OSA and SPIE. Actually, he is stakeholder of the European Photonics 21 platform and member of the board of the Wissenschaftliche Gesellschaft für Lasertechnik. He is consultant for the German Ministry of Education and Research (BMBF) as a member of the program board optical technologies and serves as a member of the steering committee of the Fraunhofer Gesellschaft. In addition Andreas Tünnermann is currently serving as member of the board of trustees for diverse institutions of the Helmholtz-Gemeinschaft, Max-Planck-Gesellschaft and Leibniz-Gemeinschaft. He is a sought-after expert in optics and photonics industry, too. He is founder and member of the board of directors of the industry driven cluster OptoNet Jena, one of the most dynamic regional optics clusters in Europe. Today, OptoNet represents companies with more than 16.000 employees and a total turnover of 3.3 bn€ around the city Jena - prominent partners are companies like Zeiss, Jenoptik, Schott.

  • Honours & Awards
    • 2022 Medal of Honor of the Fraunhofer Society 
    • 2018 Lothar-Späth-Award "Ultrakurzpulslaser der nächsten Generation", together with Bettina Limpert, Tino Eidam
    • 2018 Kaiser Friedrich Research Award CDIS Jena "Cancer Diagnostic Imaging Solution Jena: Die Revolution in der intraoperativen Schnellschnittdiagnostik", together with Tobias Meyer, Thomas Bocklitz, Michael Schmitt, Orlando Guntinas-Lichius, Thomas Gottschall, Jens Limpert, Jürgen Popp
    • 2015 European Research Award "ERC Advanced Grant" for research on lasers based on fiber optics
    • 2013 Fellow of the SPIE in recognition of distinguished and valuable contributions to the field of optics and photonics
    • 2012 Order of Merit of the Free State of Thuringia
    • 2012 Thuringian award for applied research for contributions in the development of multi-contrast microscopy and applications in clinical scenarios
    • 2011 Elected member of acatech - German National Academy of Science and Engineering
    • 2011 WLT Prize (Wissenschaftliche Gesellschaft für Lasertechnik) for pioneering work in the generation of short wavelength coherent radiation
    • 2010 Fellow of the Optical Society of America for outstanding work and leadership in high power solid state and fiber laser technology and pioneering contributions to the development in laser micromachining
    • 2005 Gottfried Wilhelm Leibniz Prize of the German Research Foundation - DFG for outstanding contributions in the field of high power diode-pumped solid state and fiber laser technology
    • 2004 Leibinger-Innovation Award (Trumpf-Laser) for important contributions in fiber laser technology
    • 2003 Schott-Award of the Zeiss Foundation for pioneering work in the field of microstructured optical fibers and fiber lasers
    • 1997 Röntgen-Prize, Justus-Liebig-Universität Gießen for the investigation of novel nonlinear processes to generate short wavelength radiation
  • Funding ID

    Major third party funded projects since 2012 (selection)

    Andreas Tünnermann has been Principal or Co- Investigator of numerous major research grants to date with a combined value of more than 50 M € in the last ten years. The total annual research budget in 2012 was approximately 6.2 M €.

    German Research Foundation DFG

    • Research Training Group: International Research Training Group GRK 2101 "Guided light, tightly packed: novel concepts, components and applications"; 2015 - 2020
    • Leibniz Award: "nano photonics - artificial media in optics and photonics"; 2005 - 2012
    • Collaborative research centres: TR7 Gravitational wave astronomy; 2005 - 2014
    • "Active micro optics - insect inspired camera"; 2011 - 2013
    • "Optical induced sub-wavelength structures"; 2012 - 2014

    German Ministry of Education and Research BMBF

    • Max Planck School of Photonics; 2018 - 2021
    • Verbund-ZIK: "astrOOptics"; 2016 - 2019
    • Verbund-ZIK: " OptiCon - Optical in situ investigation and modeling of high-temperature conversion processes"; 2018-2020
    • Verbund-ZIK: "HITECOM - High Temperature Conversion Optical Measurement"; 2015 - 2017
    • Verbund-ZIK: "onCOOPtics - fundamental aspects in laser particle acceleration"; 2012 - 2017
    • Zwanzig20: "3Dsensation"; 2016 - 2019
    • "ZIK Ultra Optics - manufacturing technologies for micro- and nano optics"; 2011 - 2016
    • Wachstumskern "Freefrom optics plus fo+"; 2014 - 2017
    • "FORMAT - black silicon - NanoSIS"; 2011 - 2013
    • "Optical micro systems (KD OptiMi)"; 2008 - 2013
    • "onCOOPtics - fundamental aspects in laser particle acceleration"; 2012 - 2014
    • "fiber laser systems for CARS-microscopy"; 2009 - 2013

    EU

    • ERC Advanced Grant "MIMAS - Multi-dimensional interferometric amplification of ultrashort laser pulses"; 2015 -2020
    • "ICAN - international coherent amplification network"; 2012 - 2013
  • Activities
    • Director Fraunhofer IOF and Institute of Applied Physics at the Friedrich Schiller University
    • Board of Directors Helmholtz Institute, Jena
    • Board of Trustees MPA, Heidelberg
    • Spokesman of the BMBF Center for Innovation Competence ZIK “ultra optics”
    • Spokesman of the BMBF Program Zwanzig20 “3Dsensation” & BMBF Program QuNET
    • Spokesman Thuringian Quantum Hub
    • Spokesman of DFG Research Training Group GRK2101
    • Spokesman of the Thuringian Innovation Center of “Quantum optics and sensors”
    • Spokesman of the “Max-Planck-School of Photonics”
    • Spokesman of the Fraunhofer Innovation Cluster “Leistungszentrum Photonik” & Fraunhofer Graduate College "Fraunhofer Graduate Research School Photonics"
    • Co-Spokesman of the Fraunhofer Cluster of Excellence “Advanced photon source”
    • Chairman of the Technical Council Fraunhofer[1]Gesellschaft
    • Council Member of the TU Bergakademie Freiberg
    • Council member of the excellence cluster “Balance of the microverse”
    • Council Member of the Faculty PAF at FSU
    • Member of Program Committee Quantum Technology 514
    • Member of the Strategic Advisory Board for the Quantum Technologies Flagship (SAB), EU
    • Member of the BMBF Research Cluster “infectooptics”
    • Member of the Expert Council "Quantumcomputing” of the Federal Gouvernment
    • Member Wissenschaftliche Gesellschaft Lasertechnik e .V. - Chairman "AG Naturwissenschaften"
    • Member of acatech "Deutsche Akademie der Technikwissenschaften"
    • Member of „Rat für technischen Souveränität RAT4TS“, BMBF
    • Member of the Excecutive Board of the Abbe Center of Photonics at the Friedrich Schiller University Jena
    • Jury member STIFT - Thüringer Innovationspreis
    • Fellow Opical Sociaty of America (OSA) & SPIE Member of Deutsche Physikalische Gesellschaft (DPG)
    • Alexander von Humboldt Stiftung - Selection Committee Alexander-von-Humboldt Professur
    • Surveyor BMBF, DFG, EU, AIF, MF, VF Projektträger Euronorm (BMWI)
    • Stakeholder Photonics 21-Platform
    • Representative of „Fraunhofer-Gesellschaft im QVLS | Quantum Valley Lower Saxony“ and Munich Quantum Valley

Filter 156 publications

Filter publications

Highlighted authors are members of the research group.

  1. Broadband Hybrid Multispectral Sensing for Ripeness Monitoring

    Authors
    A. Ruvalcaba-Perez, G. Siess, F. Castaño, N. Janunts, V. Böhm, A. Tünnermann
    Year of publication
    Published in:
    npj nanophotonics
    Spectral sensing has been widely employed in applications ranging from satellite-based remote imaging to biomedicine and precision agriculture. However, broader deployment has been constrained by the complexity and cost of traditional hyperspectral instrumentation. In recent years, efforts have shifted toward the development of compact spectrometers targeting specific spectral regions, often at the expense of broadband analytical capability. In this work, we present the proof-of-concept for an integrated multispectral sensor array for broadband spectral applications, combining Silicon- and GaSb-based photodetectors. Spectral selectivity across the VIS/NIR/SWIR spectral domain (400–2300 nm) is enabled with 19 bandpass dielectric filters in a combined active footprint of 2.02 mm². The sensor assessed in this work was specifically designed to evaluate the optimal harvest time based on weekly spectral measurements from multiple apple cultivars, without the need for destructive chemical analysis. Moreover, we demonstrate a deterministic method that employs a high-scattering region in the NIR as an internal normalization reference, enabling the resolution of temporally evolving spectral signatures associated with carotenoids, anthocyanins, chlorophylls, starch, and moisture content. These results demonstrate that broadband spectral sensors can be deployed at scale in agricultural monitoring with multi-crop validation, enhancing field yield potential and reducing post-harvest losses.
    University Bibliography Jena:
    fsu_mods_00036690External link
  2. Linear and Nonlinear Optical Properties of SiO2/TiO2 Heterostructures Grown by Plasma-Enhanced Atomic Layer Deposition

    Authors
    J. Liu, M. Mičulka, R. Rafi, S. Beer, D. Sevriukov, S. Nolte, S. Schröder, A. Tünnermann, I. Staude, A. Szeghalmi
    Year of publication
    Published in:
    Coatings
    Second harmonic (SH) radiation can only be generated in non-centrosymmetric bulk crystals under electric dipole approximation. Nonlinear thin films made from bulk crystals are technologically challenging because of complex and high-temperature fabrication processes. In this work, heterostructures made of two distinct amorphous materials, namely SiO ₂ and TiO ₂ , were prepared through plasma-enhanced atomic layer deposition (PEALD) with deposition temperature of 100 °C. By using the uniaxial dispersion model, we characterized the form birefringence of the deposited films, which can play a crucial role for the phase-matching condition in nonlinear waveguides or other nonlinear optical applications. By applying a fringe-based technique, we determined the largest diagonal component of the effective bulk second-order susceptibility, (Formula presented.) = 1.30 ± 0.13 pm/V, at a wavelength of 1032 nm. Noteworthy, we observed strong SHG signals from two-component nanolaminates, which are several orders of magnitude larger than those from single layers. The SHG signals from our samples only require the broken inversion symmetry at the interface. Here, optical properties of nanocomposites can be precisely engineered using the promising PEALD technology.
    University Bibliography Jena:
    fsu_mods_00035974External link
  3. Systematic study of amorphous ABC heterostructures at the atomic scale as a second-order nonlinear optical metamaterial

    Authors
    M. Mičulka, J. Liu, S. Beer, R. Rafi, D. Sevriukov, S. Yulin, V. Roddatis, S. Gierth, S. Nolte, S. Schröder, I. Staude, A. Tünnermann, A. Szeghalmi
    Year of publication
    Published in:
    Optical Materials Express
    A systematic exploration of amorphous ABC heterostructures revealed that nanoscale morphological modifications markedly improved their artificial bulk second-order susceptibility. These amorphous birefringent heterostructures were fabricated using plasma-enhanced atomic layer deposition of three oxides, thereby breaking centrosymmetry at the nanoscale. We observe that the optical nonlinearity depends on the thickness variation of the three constituent materials, SiO ₂ , TiO ₂ , and Al ₂ O ₃ , ranging from tens of nanometers to the atomic scale, and where the thin films exhibit second-order susceptibility at their interfaces. Our findings reveal that the enhancement of nonlinear optical properties is strongly correlated with a high interface density and superior interface quality, where the interface second-order nonlinearity transitions to bulk-like second-harmonic generation. An effective bulk second-order susceptibility of χ zzz = 2.0 ± 0.2 pm/V at 1032 nm is achieved, comparable to some conventional monocrystalline nonlinear materials.
    University Bibliography Jena:
    fsu_mods_00036144External link
  4. Adaptive LED illumination with maskless irregular lenslet arrays and controlled crosstalk

    Authors
    D. Stefanidi, L. Wilhelm, P. Schreiber, P. Schleicher, S. Kleinle, R. Rosenberger, F. Kraze, R. Brüning, A. Tünnermann
    Year of publication
    Published in:
    Journal of optical microsystems
  5. Compact, small fiber alignment system for low-loss fiber to chip coupling

    Authors
    M. Reibe, E. Beckert, A. Tünnermann
    Year of publication
    Published in:
    Optical System Alignment, Tolerancing, and Verification XVI: proceedings
  6. W/Si Multilayer Mirrors for Soft X-Ray Wavelengths < 2.4 nm

    Authors
    D. Sevriukov, S. Yulin, S. Schröder, A. Tünnermann
    Year of publication
    Published in:
    Surfaces
    W/Si multilayer mirrors are a promising candidate for soft X-ray applications at wavelengths below 2.4 nm. However, their optical performance is strongly affected by interface roughness and interlayer mixing, which limits reflectivity. One approach to improving interface quality is the application of BIAS voltage during deposition. In this study, W/Si multilayer mirrors with bilayer thickness of ~1.5 nm and 100 bilayers were fabricated using DC magnetron sputtering, with ion assistance of 75 V, 100 V, and 200 V applied during the deposition of silicon layers. Grazing incidence X-ray reflectivity (GIXR) measurements at Cu Kα (λ = 0.154 nm) showed that applying BIAS ≤ 100 V reduced interface roughness and increased reflectivity, with a maximum effect observed at 75 V. In contrast, at 200 V, strong diffusion intermixing reduced the bilayer thickness to 1.29 nm and nearly eliminated reflectivity. Soft X-ray reflectivity measurements at λ ~ 1.5 nm confirmed that ion assistance improved optical performance, increasing mirror reflectivity from ~1% (BIAS = 0 V) to ~2.3% (BIAS = 75 V). Atomic force microscopy (AFM) measurements also demonstrated a reduction in surface roughness from 0.22 nm to 0.11 nm due to using ion assistance. These results indicate that moderate ion assistance (<100 V) can enhance the optical quality of W/Si multilayer mirrors by reducing interface roughness, while excessive BIAS (>100 V) leads to diffusion intermixing and optical degradation. The novelty of this work lies in the direct application and variation in BIAS voltage during Si-layer growth, enabling detailed investigation of its influence on interface roughness and reflectivity. This approach provides a simple and effective tool for optimizing the performance of W/Si multilayer mirrors for soft X-ray applications.
    University Bibliography Jena:
    fsu_mods_00027962External link
  7. Fundamental and applied aspects of fluorescence microscopy with entangled light

    Author
    T. Gäbler
    Year of publication
    Fluorescence microscopy is an important tool in material and biomedical research. However, photobleaching and phototoxicity strongly constrain its use, particularly for investigations in living systems. As both effects scale with light intensity, reducing the excitation power preserving the signal-to-noise ratio is crucial. Entangled light offers the potential to achieve this goal because of its unique quantum properties. In particular, entangled light leads to a linear two-photon fluorescence rate, unlike the quadratic scaling in the case of excitation with coherent light. This results in a significant enhancement of fluorescence emission, especially from biological samples, at low excitation intensities. Moreover, the inherent energy-time correlation of entangled light enables spectroscopic and time-resolved fluorescence measurements. For these reasons, their initial experimental realization, followed by application-oriented implementations, is desirable. This thesis explores important aspects and demonstrates the experimental realization of two different methods driven by entangled light: entangled two-photon fluorescence microscopy and entangled fluorescence lifetime imaging microscopy. It includes a theoretical introduction to the generation of fluorescence by various excitation light states, the development of a bright entangled light source, and feasibility tests of both methods. The results show that entangled two-photon fluorescence is currently not technically feasible because of the low number of entangled photons available despite an optimized source. In contrast, the determination of fluorescence lifetimes is successfully demonstrated with significant improvements in signal-to-noise ratio and measurement accuracy compared to classical fluorescence lifetime imaging microscopy. Based on the presented findings, this thesis outlines the necessary next steps toward the application-oriented realization of fluorescence microscopy with entangled light.
    University Bibliography Jena:
    fsu_mods_00030240External link
  8. Multi-spectral analyses in the VIS-NIR-SWIR for detection of ideal harvesting time and degree of ripeness

    Authors
    A. Ruvalcaba-Perez, G. Siess, N. Janunts, V. Boehm, A. Tuennermann
    Year of publication
    Published in:
    Photonic Technologies in Plant and Agricultural Science II: 29–30 January 2025 San Francisco, California, United States
  9. Manufacturing Process and Characteristics of Silica Nanostructures for Anti-Reflection at 355 nm

    Authors
    A. Gärtner, M. Mureșan, C. Mühlig, T. Herffurth, N. Felde, H. Wagner, U. Schulz, A. Bingel, S. Schröder, T. Mocek, A. Tünnermann
    Year of publication
    Published in:
    Coatings
  10. Submicrometer Defect Detection and Classification by Angle Resolved Light Scattering

    Authors
    S. Schröder, A. Munser, S. Ma, T. Herffurth, T. Gischkat, C. Mühlig, A. Tünnermann
    Year of publication
    Published in:
    Proceedings: Optica OIC — Optical Interference Coatings Conference 2025 18–23 May 2025, Tucson, Arizona, United States
  11. Second harmonic generation in iridium and iridium/Al₂O₃ heterostructure coatings

    Authors
    P. Paul, R. Rafi, S. Beer, O. Ghaebi, S. Klimmer, G. Soavi, S. Nolte, S. Schröder, A. Tünnermann, A. Szeghalmi
    Year of publication
    Published in:
    Optical Materials Express
  12. "Wir wollen die Zukunft mitgestalten"

    Author
    A. Tünnermann
    Year of publication
    Published in:
    Wirtschaftsspiegel: das Wirtschaftsmagazin aus der Mitte Deutschlands
    University Bibliography Jena:
    fsu_mods_00014214External link
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