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  1. Article

    Open Access

    Internal Diameter Coating by Warm Spraying of Fine WC-12Co Powders (− 10 + 2 µm) with Very Short Spray Distances up to 10 mm

    The internal diameter (ID) coating by means of thermal spraying is currently experiencing growing interest in science and industry. In contrast to the well-established plasma- and arc-based spray techniques, t...

    I. Baumann, W. Tillmann, C. Schaak, K. Schmidt… in Journal of Thermal Spray Technology (2021)

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  2. Article

    Internal Diameter Coating Processes for Bond Coat (HVOF) and Thermal Barrier Coating (APS) Systems

    Current developments in different industrial sectors show an increasing demand of thermally sprayed internal diameter (ID) coatings. The most recent research and development is mainly focused on commercial app...

    W. Tillmann, C. Schaak, L. Hagen, G. Mauer… in Journal of Thermal Spray Technology (2019)

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  3. Article

    Open Access

    In-volume structuring of silicon using picosecond laser pulses

    We have demonstrated for the first time the permanent local modification of the bulk of silicon by repeated illumination with infrared (1.55 μm) picosecond pulses. Furthermore, we evaluated the characteristics...

    H. Kämmer, G. Matthäus, S. Nolte, M. Chanal, O. Utéza, D. Grojo in Applied Physics A (2018)

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  4. Article

    Open Access

    Selective laser melting of hypereutectic Al-Si40-powder using ultra-short laser pulses

    We investigate the use of ultra-short laser pulses for the selective melting of Al-Si40-powder to fabricate complex light-weight structures with wall sizes below \(100\,\upmu \text {m}\) 100μm combined with high...

    T. Ullsperger, G. Matthäus, L. Kaden, H. Engelhardt, M. Rettenmayr… in Applied Physics A (2017)

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  5. No Access

    Article

    Large-area microlens emitters for powerful THz emission

    A microlens coupled large-area emitter based on low-temperature grown GaAs is presented. A hexagonal microlens array directs the incident pump light into every second gap of a finger electrode structure. Conse...

    G. Matthäus, S. Nolte, R. Hohmuth, M. Voitsch, W. Richter… in Applied Physics B (2009)

  6. No Access

    Article

    Electrooptical sampling of ultra-short THz pulses by fs-laser pulses at 1060 nm

    Electrooptical sampling of ultra-broadband terahertz (THz) radiation with the help of ultra-short 1060-nm pulses is reported for the first time. The THz pulses are generated by exciting a surface emitter (InAs...

    B. Pradarutti, G. Matthäus, C. Brückner, J. Limpert, S. Riehemann… in Applied Physics B (2006)

  7. No Access

    Article

    Thermal effects vs. gain in femtosecond laser written waveguides in neodymium doped fused silica

    The influence of thermal effects in gain measurements of fs laser-written waveguides in actively doped glass is reported for the first time. We show that these effects strongly contribute to the signal enhance...

    G. Matthäus, J. Burghoff, M. Will, S. Nolte, A. Tünnermann in Applied Physics A (2006)

  8. No Access

    Article

    Über den Nachweis von Methylglyoxal sowie über die Ozonspaltung des Kautschuks berichten

    R. Pummerer, G. Matthäus, L. SociasViñals in Zeitschrift für analytische Chemie (1938)