Ultrafast Dynamics in Condensed Matter group

Below you find a list of current group members and openings. Enthusiastic thesis or internship students are always welcome to contact us directly and to enquire for opportunities. If no openings are listed, but you are a motivated person interested in joining our group, please feel free to get in touch. We may be able to figure out a way to support you. We strive after building a group where diversity is a core aspect, and we would be particularly happy to help you jump on board with us if you belong to an underrepresented category within physics.

Principal Investigator
Stefano Bonetti, Ph.D.
Stefano Bonetti

Stefano Bonetti obtained a Ph.D. in Materials Physics in 2011 from KTH - Royal Institute of Technology, Stockholm, Sweden with a dissertation on spin dynamics driven by spin transfer torque. He was then a postdoctoral fellow in the research group led by Jo Stöhr and Hermann Dürr at Stanford University and at SLAC National Accelerator Laboratory, investigating ultrafast magnetic dynamics and imaging synchrotron and free-electron-laser X-ray radiation (2012 – 2014). In 2014 he joined as a Researcher the Department of Physics at Stockholm University. Since then, he has been awarded one of the International Career Grants (Swedish Research Council, Marie Curie Action), for the project "THz spin control" (2015-2019, 800kEUR), and a European Research Council Starting Grant for the project "Understanding the speed limits of magnetism", (2017-2022, 2MEUR). Since January 2017, Stefano has a tenured position (Associate Professor equivalent) at Stockholm University, where he leads the group of Ultrafast Dynamics in Condensed Matter. In 2017, Stefano was selected as one of nine Wallenberg Academy Fellow in Natural Sciences by the Royal Academy of Science, with the project “Ultrafast Coherent Control of Quantum Materials” (2018 – 2023, 800 kEUR). In 2018, he was awarded a grant from the Swedish Research Council for the project "Nonlinear phononics" (2019 - 2023, 360 kEUR). In 2019 he obtained funding from the Knut and Alice Wallenberg foundation for the project "Dynamic Quantum Matter" (2020 – 2025, 2.8 MEUR), together with Alexander Balatsky (lead applicant), Jens Bardarson, Emil Bergholtz and Annica Black-Schaffer, as well as from the Swedish Research Council for the project: "Detection of Dark Matter Axions in the Sky and in the Lab" (2020 – 2024, 1.8 MEUR), together with Hiranya Peris (lead applicant), Alexander Balatsky, Jan Conrad, Jón Gudmundsson and Frank Wilczek.

Debanjan Polley, Ph.D.
Debanjan Polley

Debanjan's research interests are in THz spectroscopy of nanostructures, THz metamaterials, magnetization dynamics and spintronics. He has worked at S. N. Bose National Centre for Basic Sciences, Kolkata, India under the guidance of Dr. Rajib Kumar Mitra and Prof. Anjan Barman. He defended his Ph.D. thesis “Manipulating Terahertz Radiation Using Nanostructures” on July, 2016. He will join our group at Stockholm University March 2017 as a post-doctoral fellow, where he will investigate spin transport and dynamics in terahertz regime. Besides his work, Debanjan enjoys reading historical fictions, playing table tennis, trekking and exploring new places.

Martina Basini, Ph.D.
Martina Basini

Martina obtained her Ph.D. in Condensed Matter from Milano University, in Milano, Italy in 2017, with the thesis “Effect of the hollow topology on the local spin dynamics in iron oxide magnetic nanoparticles”. From March 2017 to July 2018 she was a postdoctoral fellow in the group of Alessandro Lascialfari in Milano. During her Ph.D. Martina worked in international facilities gaining expertise on Muon Spin Resonance (PSI, Switzerland), X-Ray Magnetic Dichroism (Bessy II, Germany) and Neutron Spettroscopy (ILL, Grenoble). In the same period, she developed simulation tools to study the local dynamics in different spins systems in collaboration with Yves Gossuin (University of Mons, Belgium) and with Miguel Novak (Universidad Federal do Rio de Janeiro, Brazil). She investigates the ultrafast dynamics driven by coherent terahertz radiation in quantum materials.

Matteo Pancaldi, Ph.D.

Matteo obtained his Ph.D. from the Nanomagnetism group in the nanoGUNE Consolider Research Center (San Sebastian, Spain), under the supervision of Dr. Paolo Vavassori. He received the Master degree in Physics from the University of Bologna, Italy, in December 2013. His research topics include the study of artificially frustrated magnetic systems and the magneto-optical characterization of magnetic nanostructures. His research will focus on the nonlinear spin dynamics driven by strong terahertz radiation.

Lucile Soumah, Ph.D.
Lucile Soumah

Lucile has a double Master Degree in Condensed Matter Physics from the Pierre et Marie Curie University (in Paris) and Uppsala University. During her Ph.D. work, she used the Pulsed Laser Deposition technique to grow ultrathin films of magnetic insulators. She obtained her Ph.D. Degree from the Unite Mixte de Recherche CNRS Thales in Paris, under the supervision of M. Anane. Her research at SU will focus of the THz and optically induced demagnetization of different quantum materials as well as THz spectroscopy of magnetic devices. Besides magnetic materials, she likes drawing, climbing, swimming, hiking and eating cheese.

Björn Wehinger, Ph.D.
Björn Wehinger

Björn’s research interests are spin and lattice correlations in quantum materials close to criticality. He is currently working on Stefano Bonetti’s ERC project “Understanding the speed limits of magnetism” and is based at University of Venice and FERMI in Trieste (Italy). He graduated at University of Grenoble (France) in July 2013 with a dissertation on x-ray scattering from phonons and ab initio calculations. Within a junior scientist position at the European Synchrotron Radiation Facility (Grenoble, France) he developed a new method for quantitative analysis of diffuse scattering and worked on high pressure experiments. In 2014 Björn moved to Switzerland where he worked on low dimensional quantum materials at University of Geneva and Paul Scherrer Institute. Björn was awarded a Marie Skłodowska-Curie fellowship on low dimensional quantum materials co-founded by the Paul Scherrer Institute. He furthermore chairs the Special interest group “Dynamics, Disorder and Diffuse scattering” of the European Crystallographic Association. Besides work he enjoys playing with his little son, rock climbing and mountaineering.

Ph.D. students
Kumar Neeraj

Neeraj obtained his B.Sc (Hons.) in Physics from Kirorimal College, University of Delhi, India. He obtained his M.Sc in Physics from SN Bose National Centre for Basic Sciences, Kolkata, India. He completed his master thesis under the supervision of Dr. Rajib Kumar Mitra and Prof. Anjan Barman, studying the ground state opto-electronic properties of carbon nanotube films and their use as effective electromagnetic interference shielding device in the THz region. He was also involved in micro fabrication of polarizers and antidot structures for THz studies. Apart from research, he takes keen interest in football, reading, listening good music. He is pursuing his Ph.D. in Spin transport and Dynamics in the Terahertz Regime.

Vivek Unni

Vivek obtained his M.Sc. (Physics) with specialization in photonics and B.Sc. (Hons.) in physics, from Sri Sathya Sai Institute of Higher Learning, India. He completed his master’s thesis in the topic “No cloning Theorem” under the supervision of Prof. Debendranath Sahoo. He has been working as Junior Research Fellow in the Multimodal Microscopy project funded by Department of Science and Technology, Government of India from July 2016. His other interests include Science education, World Cinema, Cricket, Football and International affairs. He is pursuing his Ph.D. in Ultrafast Spins: The Role of Lattice and Electrons.

Nanna Zhou Hagström

Nanna obtained both her B.Sc and M.Sc in Physics from Université Pierre et Marie Curie in Paris, and has a B.Sc in Mathematics from Stockholm University. During her master she did two internships at the Stanford Synchrotron Radiation Lightsource (SSRL) in California. During Spring 2016 she studied mackinawite, an iron sulfide that adapts to oxidative impurities, through X-ray absorption spectroscopy at SSRL, under the supervision of John Bargar and Vincent Noël. In 2017 she spent 5 months under the supervision of Michael Toney (SSRL) and Ana Flavia Nogueira (University of Campinas, Brazil) studying hybrid organic-inorganic mixed halide perovskite, a solar absorber, through synchrotron X-ray diffraction. She is pursuing her Ph.D. in ultrafast imaging of spin dynamics at the nanoscale.

Are you an enthusiastic, motivated student interested in doing your Ph.D. studies in our research topics?
Feel free to get in touch with us by email describing what drives your scientific curiosity
and why do you think you would be a good fit for the group.

Master and bachelor thesis candidates
Lukas Alber

Lukas obtained his B.Sc. in physics from the University of Innsbruck. His thesis project was on different types of entanglement and their generation in a laboratory environment, supervised by Ben Lanyon. He worked in the lab of Rainer Blatt together with colleagues of Tracy Northup´s group on a project of laser intensity stabilization. Lukas moved to Stockholm in 2018 to join the Computational Physics M.Sc. program at Stockholm University. Besides programming, Lukas is into modern art, philosophy and outdoor sports.

Interested in doing your thesis project in our group?
Take a look at the "Thesis projects" tab.

Student Interns

Interested in doing an internship in our group?
Feel free to contact us.


Matthias Hudl, Ph.D.
Matthias Hudl

Former senior postdoc, Matthias is now Laser Scientist at the Department of Physics of Stockholm University

Ph.D. students
Valentino Scalera

Valentino spent six months in our group and he is now completing his Ph.D. studies at the University of Naples Federico II, Italy

Bachelor thesis candidates
Markus Tollet

Technical Intern at Ericsson AB, Stockholm, Sweden.

Rebecca Elovsson

Master medical physics student at Stockholm University.

Sara Kullström

Master geophysics student
at Uppsala University.

Anders Törnblom

Master medical physics student
at Stockholm University.

Stefan Sigurdsson

Master physics student
at Stockholm University.

Student Interns
Jean-Rémi Chatroux

Jean-Rémi did an internship in our group while student at the engineering school ENSICAEN of Caen, France.

Kasturie Jatkar

Master physics student at Uppsala University.

Vincent Bourinet

Graduated with Valedictorian distinction from the University of Bordeaux, France. Now aerospace engineering master student and part time employee at Airbus

Raphael Fournet

Graduated from ENSICAEN in Caen, France.

Martin Pavelka

Master physics student at Uppsala University.

Florence Jones

Undergraduate student
at Loughborough University (UK).