TNW-ANP-COPS

Willem Vos obtained a Ph.D. in physics at the University of Amsterdam with highest honors (cum laude) for his thesis “Phase behavior of simple systems at high pressure”. He held a prestigious Fellowship at the Geophysical Laboratory (Carnegie Institution for Science, USA) where he discovered a novel class of "van der Waals compounds" at very high pressures. He then studied photonic crystal and colloid physics. His team developed “inverse opal” photonic crystals; their Science paper inspired many groups (>1350 citations). Since 2002 he is professor in Complex Photonic Systems (COPS), University of Twente. His team demonstrated the first ever control of spontaneous emission of light with a 3D photonic band gap. Vos is Fellow of the APS and the OSA, recipient of the Snellius medal and the Descartes-Huygens prize. He is currently collaborating with both major high-tech industries and with SMEs, in order to put his group's know-how to use by solving practical problems. His papers are on average cited >40x. His students have become faculty members at leading institutes, or pursue careers in major industries and non-profit organizations.

See on the web: https://nano-cops.com/

Expertise

  • Physics

    • Light
    • Photonics
    • Gaps
    • Media
    • Photonic Crystal
    • Crystals
  • Material Science

    • Photonic Band Gap
    • Crystal

Organisations

Ancillary activities

  • QuixAdvies & aandeelhouder

Publications

Jump to: 2025 | 2024

2025

Mesoscopic theory of wavefront shaping to focus waves deep inside disordered media (2025)Physical review A : atomic, molecular, and optical physics and quantum information (E-pub ahead of print/First online). Tiggelen, B. v., Lagendijk, A. & Vos, W. L.https://journals-aps-org.ezproxy2.utwente.nl/pra/accepted/02077Nc3Ked1982743637f39e8192db1d7dbcb395Spontaneous Emission of Precisely Positioned Quantum Dots in 3D Silicon Photonic Band Gap Crystals (2025)[Thesis › PhD Thesis - Research UT, graduation UT]. University of Twente. Schulz, A. S.https://doi.org/10.3990/1.9789036565141Dispersion of backward-propagating waves in a surface defect on a 3D photonic band gap crystal (2025)[Working paper › Preprint]. ArXiv.org. Vreman, T. J., Goodwin, M. J., Corbijn van Willenswaard, L. J., Barnes, W. L., Lagendijk, A. & Vos, W. L.https://doi.org/10.48550/arXiv.2502.06369Imaging the phase of nanophotonic structures in reflection (2025)[Contribution to conference › Poster] NWO Physics 2025. Alferink, N., Vengaladas, S., Goodwin, M. J., Barolle, V., Balondrade, P., Aubry, A., Lagendijk, A. & Vos, W. L.Wavefront Shaping Demo-Setup (2025)[Contribution to conference › Other] NWO Physics 2025. Goodwin, M. J., Vos, W. L., Vreman, T. J., Alferink, N., Alferink, N., Hubert, M. & Lagendijk, A.Wavefront Shaping with varying degrees of freedom (2025)[Contribution to conference › Poster] NWO Physics 2025. Hubert, M., Mulder, B., Vreman, T. J., Tromp, T., Lagendijk, A. & Vos, W. L.

2024

Experimentally mapping the scattering phases and amplitudes of a finite object by optical mutual scattering (2024)Physical review A : atomic, molecular, and optical physics and quantum information, 110. Article 063518. Rates, A., Lagendijk, A., Truong, M. D. & Vos, W. L.https://doi.org/10.1103/PhysRevA.110.063518Observation of Cartesian light propagation through a three-dimensional cavity superlattice in a silicon photonic band gap crystal (2024)Physical Review Research, 6(4). Article 043235. Adhikary, M., Kozon, M., Uppu, R. & Vos, W. L.https://doi.org/10.1103/PhysRevResearch.6.043235Accelerated spontaneous emission of PbS quantum dots in 3D silicon photonic band gap crystals (2024)[Contribution to conference › Poster] GdR Complexe Annual Meeting 2024. Vreman, T. J., Goodwin, M. J., Lagendijk, A. & Vos, W. L.Photonic Crystals for Controlling the Emission of Light (2024)[Contribution to conference › Poster] CHAINS 2024. Goodwin, M. J., Vreman, T. J. & Vos, W. L.Position-resolved optical phase measurements in reflection (2024)[Contribution to conference › Poster] GdR Complexe Annual Meeting 2024. Alferink, N., Goodwin, M., Lagendijk, A. & Vos, W. L.Wavefront Shaping with varying degrees of freedom (2024)[Contribution to conference › Poster] GdR Complexe Annual Meeting 2024. Hubert, M., Mulder, B., Vreman, T. J., Tromp, T., Lagendijk, A. & Vos, W. L.Mesoscopic Theory of Wavefront Shaping to Focus Waves inside Disordered Media (2024)[Working paper › Preprint]. ArXiv.org. Van Tiggelen, B. A., Lagendijk, A. & Vos, W. L.https://doi.org/10.48550/arXiv.2410.10487Mesoscopic Theory of Wavefront Shaping to Focus Waves inside Disordered Media (2024)[Working paper › Preprint]. ArXiv.org. Tiggelen, B. v., Lagendijk, A. & Vos, W. L.Strong group delay dispersion in 3D photonic band gap crystals and in planar microcavities. (2024)[Contribution to conference › Poster] 12th European Optical Society Annual Meeting, EOSAM 2024. Mulder, B., Vos, W. L. & Lagendijk, A.Probing the position-dependent optical energy fluence rate in three-dimensional scattering samples (2024)Physical review A : atomic, molecular, and optical physics and quantum information, 110(3). Article 033520. Akdemir, O., Truong, M. D., Rates, A., Lagendijk, A. & Vos, W. L.https://doi.org/10.1103/PhysRevA.110.033520Non-utopian optical properties computed of a tomographically reconstructed real photonic nanostructure (2024)Optics express, 32(18), 32028-32047. Corbijn Van Willenswaard, L. J., Smeets, S., Renaud, N., Schlottbom, M., van der Vegt, J. J. W. & Vos, W. L.https://doi.org/10.1364/OE.519464Experimentally mapping the scattering phases and amplitudes of a finite object by optical mutual scattering (2024)[Working paper › Preprint]. ArXiv.org. Rates, A., Lagendijk, A., Truong, M. D. & Vos, W. L.https://doi.org/10.48550/arXiv.2407.18677Symmetries and Wavefunctions of Photons Confined in three-dimensional (3D) Photonic Band Gap Superlattices (2024)Physical review B: Covering condensed matter and materials physics, 109. Article 235141. Kozon, M., Lagendijk, A., Schlottbom, M., van der Vegt, J. J. W. & Vos, W. L.http://10.1103/PhysRevB.109.235141Symmetries and wave functions of photons confined in three-dimensional photonic band gap superlattices (2024)Physical review B: Covering condensed matter and materials physics, 109(23). Article 235141. Kozoň, M., Lagendijk, A., Schlottbom, M., van der Vegt, J. J. W. & Vos, W. L.https://doi.org/10.1103/PhysRevB.109.235141Strongly inhibited spontaneous emission of PbS quantum dots covalently bound to 3D silicon photonic band gap crystals (2024)The Journal of physical chemistry C, 128(22), 9142-9153. Article 128. Schulz, A. S., Kozoň, M., Vancso, G. J., Huskens, J. & Vos, W. L.https://doi.org/10.1021/acs.jpcc.4c01541Fabrication and analysis of 3D inverse woodpile photonic crystals in silicon (2024)[Contribution to conference › Poster] EuroNanoLab Experts School - Dry Etching. Goodwin, M. J., Vreman, T. J., Harteveld, C. A. M. & Vos, W. L.Interference of light scattered by random and periodic arrays of pillars (2024)[Contribution to conference › Poster] EuroNanoLab Experts School - Dry Etching. Goodwin, M. J., Akdemir, O., Truong, M. D., Bitnec, L., Lagendijk, A. & Vos, W. L.Non-utopian optical properties computed of a tomographically reconstructed real photonic band gap crystal (2024)[Working paper › Preprint]. ArXiv.org. Willenswaard, L. J. C. v., Smeets, S., Renaud, N., Schlottbom, M., Vegt, J. J. W. v. d. & Vos, W. L.https://doi.org/10.48550/arXiv.2402.09395Probing the position-dependent optical energy fluence rate in three-dimensional scattering samples (2024)[Working paper › Preprint]. ArXiv.org. Akdemir, O., Truong, M. D., Rates, A., Lagendijk, A. & Vos, W. L.https://doi.org/10.48550/arXiv.2401.14748

Research profiles

In education, it is ultimately my goal to challenge (in Dutch: uitdagen) students by - in an ideal setting - asking questions that have not been answered before. Of course, finding an answer - or even the approach to an answer, or even more basically whether the question is answerable at all - will become a joint adventure that is approached with lots of discussions in the beginning (what path shall we try first?), during the project (are we going in a right direction?), or at the end (do we explain things clearly to colleagues?)
While such an approach does not eschew "high risk and high gain", it often leads to the most exhilarating experiences. And not to worry, COPS seniors are always on board to join the ride (even when it gets bumpy at times), so: shared sorry & shared happiness!
Drop by for a discussion, and just so you know: we have got the best coffee on campus!

Affiliated study programs

Courses academic year 2024/2025

Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.

Courses academic year 2023/2024

I am leading ("PI") several major research programs in close collaboration with high-tech industry:

NWO-TTW Perspectief program "Advanced Wave Engineering for Sustainable Optical Applications (AWAVE)" (jointly with Nandini Bhattacharya from TUD), 2024-2030, see https://www.utwente.nl/en/news/2023/12/1279316/second-year-in-a-row-big-perspectief-programme-for-willem-vos

NWO-TTW Perspectief program "Optical coherence; optimal delivery and positioning (OPTIC)", 2023-2029, see https://www.utwente.nl/en/news/2022/12/370068/46-million-euros-for-ut-research-on-light-conduction

NWO-TTW Perspectief program "Freeform scattering optics (FFSO)", 2016-2023, see: https://www.freeformscatteringoptics.com/

FOM open program "Stirring of Light!", 2011-2016

COPS YouTube channel: https://www.youtube.com/@nanocops/videos

COPS 20th anniversary (in 2022): https://www.youtube.com/watch?v=iCWY5-Juebk

COPS on the 8 o'clock prime time news, aka NOS 8-uur journaal: https://www.youtube.com/watch?v=nR4tIaYUFBY

New York Times, Science Watch "A van der Waals solid", July 7, 1992, see: https://www.nytimes.com/1992/07/07/science/science-watch-a-van-der-waals-solid.html

Address

University of Twente

Horst Complex (building no. 20), room ME117
De Horst 2
7522 LW Enschede
Netherlands

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