Chargé de Recherche
Laboratoire IEMN – UMR 8520
Avenue Henri Poincaré
59652 Villeneuve d’Ascq
+33 (0)3 20 19 78 56

Mathias Vanwolleghem graduated as an engineer in theoretical physics in 2000 from Ghent University in Belgium. He received his PhD in May 2005 from the same University in the Photonics Group of the Department of Information Technology, on the theoretical and experimental investigation of new concepts for monolithically integrated ferromagnetic metal- and InP-based optical isolators. This work still stands today as the only monolithically integrated 1.3 μm DFB laser/isolator with a record isolation of 25dB. He subsequently joined the Institut d’Electronique Fondamentale at Université Paris XI in Orsay, France as a postdoctoral researcher further specializing in numerical modeling of nanophotonic and plasmonic nonreciprocal phenomena. At the end of 2006 he obtained a permanent CNRS position focusing on novel optical nonreciprocal phenomena. In this domain he holds three patents. In September 2012 he joined the THz Photonics group of the IEMN Laboratory in Villeneuve d’Ascq, France, where he is extending his research interest towards THz and Mid-infrared photonics in general.  In 2014 he was awarded by the French national research Agency a Young Researcher Grant to extend his expertise in optical nonreciprocity towards mid-infrared and TeraHertz frequencies. Mathias Vanwolleghem has co-authored over 60 publications and conference talks on new approaches and demonstrations of compact nonreciprocal photonic circuits and magnetoplasmonic structures. Furthermore he co-organised the symposium on Nonreciprocal Photonics at the 2010 MRS Fall Meeting in Boston and is co-editor of the Elsevier Journal Photonics and Nanostructures – Fundamentals and Applications.

Five selected publications

[1] Lukáš Halagačka, Mathias Vanwolleghem, Francois Vaurette,Jamal Ben Youssef, Kamil Postava, Jaromir Pistora, Beatrice Dagens, “Magnetoplasmonic nanograting enables optical nonreciprocity sign reversal”, Opt. Express 26 (24), 31554-31566 (2018).
[2] M. Mičica, S. Eliet, M. Vanwolleghem, R. Motiyenko, A. Pienkina, L. Margulès, K. Postava, J. Pištora, and J. Lampin, « High-resolution THz gain measurements in optically pumped ammonia, » Opt. Express  26, 21242-21248 (2018).
[3] Jalas D, Petrov A, Eich M, Freude W, Fan S, Yu Z, Baets R, Popović M, Melloni A, Joannopoulos J D, Vanwolleghem M, Doerr C R, Renner H. What is — and what is not — an optical isolator. Nature Photonics. 2013;7(8):579–582. Available at:
[4] W. Smigaj, J. Romero-Vivas, B. Gralak, L. Magdenko, B. Dagens, M. Vanwolleghem, « Magnetooptical circulator designed for operation in uniform external magnetic field », Opt. Lett. 35(4), 568-570 (2010).
[5] M. Vanwolleghem, X. Checoury, W. Smigaj, B. Gralak, L. Magdenko, K. Postava, B. Dagens, P. Beauvillain, J.-M. Lourtioz « Unidirectional band gaps in uniformly magnetized two-dimensional magnetophotonic crystals » Physical Review. B, vol. 80 (12), 121102(R), 4 pages, 2009