Ultrafast Dynamics in Nanoscale Systems

Group Leader: Klaas-Jan Tielrooij

Main Research Lines

  • Heat and charge transport in nanoscale systems

  • Ultrafast optics and optoelectronics

  • Nonlinear optical phenomena

  • Detection and harvesting of light

  • Terahertz technologies

  • Nanofabrication of systems based on 2D materials

Currently, one of the main material systems under investigation is that of two-dimensional, layered materials and hybrid van der Waals heterostructures. In particular, the group studies the exciting interplay between different carriers of energy/heat/information in these systems, such as photons, electrons, phonons, spins and other (quasi-)particles.

Since the group was established only recently, many efforts have been put into setting up the laboratory, which is now fully operational and generating data! Meanwhile, the group has expanded significantly during 2020, with several new PhD students, postdocs and undergraduate students joining it.

A significant effort of the research in the group takes place within the framework of the ERC Starting Grant project CUHL (Controlling Ultrafast Heat in Layered materials), which was awarded to Dr. Tielrooij at the end of 2018. The group also led the BIST Ignite project 2DNanoHeat (awarded in March 2018) on heat transport in novel quantum materials, including topological insulators, which is now an ongoing collaboration between various ICN2 groups and ICFO. In 2020, the group was awarded a project by the Spanish Ministry of Science, STEAMY, which is a joint experimental-computational effort towards understanding and steering heat flow in 2D materials.

During 2019 and 2020, the group has been working on several projects related to nonlinear optics in the terahertz (THz) regime, using 2D materials. As part of this research, the group was granted several beamtimes at the TELBE facility of the Helmholtz-Zentrum Dresden-Rossendorf (Germany).

In 2020, the group started a new collaborative project with IFAE, 2DetMIPs, funded via a BIST Ignite award, which has the aim to use 2D materials for the detection of minimum-ionizing particles in high-energy physics experiments.

Group Leader

Klaas-Jan Tielrooij

Group Leader

Klaas-Jan Tielrooij is Group Leader at the ICN2 since October 2018, heading the Ultrafast Dynamics in Nanoscale Systems group. Between 2018 and 2020, he was Visiting Professor at the Graduate School of Excellence Material Science in Mainz (Germany). Before joining the ICN2, he was a research fellow at the Institute of Photonic Sciences (ICFO). He obtained his Ph.D. from the University of Amsterdam (the Netherlands) in December 2010 with a thesis that was awarded the FOM Physics Thesis Prize 2011. He was awarded an ERC Starting Grant in 2018, and a Ramon y Cajal Fellowship in 2019.

Dr Tielrooij has authored more than 45 peer-reviewed publications, 18 of which in Nature and Science and family, and around 6,000 citations. His H-index is currently 29 (10 years after Ph.D.)

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