Horst Complex

prof.dr.ir. G.R.B.E. Römer (Gert-Willem)

Professor
ET-MS3-LP
Horst Complex N102
g.r.b.e.romer@utwente.nl
+31534892519
Business card

After obtaining a Master degree in Electrical Engineering, I obtained a PhD degree at the University of Twente, on Modelling and control of laser surface treatment, in 1999. Ever since, my scientific interests are on the fundamental physical phenomena occurring during laser‐material inter-action, in order to optimize laser‐material processing for laser‐based manufacturing. Main processes are material processing using ultra short pulsed laser sources for micro‐ and nano‐machining, and laser cladding and additive manufacturing (3D printing) using high power laser sources. As well as, the development of models, as well as sensors and real‐time control algorithms for laser‐material processes (to ensure reliable processing results).

From 2008 to 2017, I was an associate professor at the chair of Applied Laser Technology at the University of Twente. From 2017 I was an associate professor, and since 2020 I am full professor of the research chair Laser Processing.

Besides chair holder of the research chair, I am Research Coordinator of the department of Mechanics of Solids, Surfaces & Systems (MS3).

Expertise

  • Material Science

    • Laser
    • Surface
    • Material
    • Surface Structure
    • Laser Pulse

  • Physics

    • Steel

  • Engineering

    • Induced Periodic Surface Structure
    • Surfaces

Organisations

My main research interests include:

  • fundamental physical phenomena occurring during laser-material interaction
  • optimizing laser-material processing for laser-based manufacturing
  • material processing using ultra short pulsed laser sources, in the fs and ps regime, for micro- and nano-machining
  • high power laser surface treatment
  • high power laser-based Directed Energy Deposition, an Additive Manufacturing technique
  • means and methods for monitoring/sensing and control of laser-material processing systems
  • applications of innovative laser-based manufacturing

Publications

Jump to: 2025 | 2024 | 2023

2025

Dynamic laser beam shaping by means of a deformable mirror to tailor microstructure in Directed Energy Deposition (2025)Journal of materials processing technology, 339. Article 118797. Bremer, S. J. L., Luckabauer, M., Aarts, R. G. K. M. & Römer, G.-W. R. B. E.https://doi.org/10.1016/j.jmatprotec.2025.118797

2024

Mathematical analysis of dynamic high power laser beam shaping using Galvanometer Scanners or Deformable Mirrors (2024)Optics & Laser Technology, 183. Article 112356 (E-pub ahead of print/First online). Bremer, L., Aarts, R. G. K. M. & Römer, G. R. B. E.https://doi.org/10.1016/j.optlastec.2024.112356Design of an Automated Cobot System for Pre/Post cleaning during Railway Repair using WAAM (2024)[Thesis › EngD Thesis]. University of Twente. Hajiabadi, S.Laser implantation of ceramic particles for enhanced surface textures on tool steel (2024)[Thesis › PhD Thesis - Research UT, graduation UT]. University of Twente. Ettema, B. R.https://doi.org/10.3990/1.9789036563635Thermal fields induced by oscillating laser beams versus non-oscillating equivalent laser beams — A numerical study (2024)International journal of heat and mass transfer, 234. Article 126129. Bremer, S. J. L., Aarts, R. G. K. M. & Römer, G. R. B. E.https://doi.org/10.1016/j.ijheatmasstransfer.2024.126129Design and implementation of dynamic beam shaping in high power laser processing by means of a Deformable Mirror (2024)Optics & Laser Technology, 177. Article 111066. Bremer, S. J. L., Aarts, R. G. K. M. & Römer, G.-W. R. B. E.https://doi.org/10.1016/j.optlastec.2024.111066Reducing Feature Size in Laser Implantation Texturing (2024)Micromachines, 15(8). Article 958. Ettema, B., Matthews, D. & Römer, G.-W.https://doi.org/10.3390/mi15080958Dynamic High Power Laser Beam Shaping in Directed Energy Deposition (2024)[Thesis › PhD Thesis - Research UT, graduation UT]. University of Twente. Bremer, L.https://doi.org/10.3990/1.9789036560832Update on Laser-induced Periodic Surface Structures on COC (2024)[Dataset Types › Dataset]. Zenodo. Herrmann, C., Römer, G.-w. & Feinauegle, M.https://doi.org/10.5281/zenodo.12784386Recent progress on Laser-induced Periodic Surface Structures on Medical Grade Cyclic Olefin Copolymer (2024)[Contribution to conference › Poster] Polymer Replication Nanoscale, PRN 2024. Herrmann, C., Römer, G. R. B. E. & Feinaeugle, M.

2023

Influence of water layer thickness on crater volume for nanosecond pulsed laser ablation of stainless steel (2023)Applied physics A: Materials science and processing, 129(12). Article 824. van der Linden, S., Hagmeijer, R. & Römer, G. R. B. E.https://doi.org/10.1007/s00339-023-07050-wRevealing the effects of laser beam shaping on melt pool behaviour in conduction-mode laser melting (2023)Journal of Materials Research and Technology, 27, 3955-3967. Ebrahimi, A., Sattari, M., Babu, A., Sood, A., Römer, G. W. R. B. E. & Hermans, M. J. M.https://doi.org/10.1016/j.jmrt.2023.11.046

Other contributions

Click here for an overview of previous projects and current projects running in my chair.

Research profiles

Address

University of Twente

Horst Complex (building no. 20), room N102
De Horst 2
7522 LW Enschede
Netherlands

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Organisations

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