Ultrafast Dynamics in Nanoscale Systems

Group Leader: Klaas-Jan Tielrooij

Klaas-Jan Tielrooij

Group Leader

klaas.tielrooij@icn2.cat

Group Leader

Klaas-Jan Tielrooij founded the Ultrafast Dynamics in Nanoscale Systems group at ICN2 in October 2018 as a Junior Group Leader. In 2022 he was promoted to Senior Group Leader. He also works as an Associate Professor at Eindhoven University of Technology (the Netherlands). Before joining the ICN2, he was a Research Fellow at the Institute of Photonic Sciences (ICFO). Between 2018 and 2020, he was Visiting Professor at the Graduate School of Excellence Material Science in Mainz (Germany). He obtained his Ph.D. from the University of Amsterdam (the Netherlands) in December 2010.

Klaas-Jan has received several prizes, including the Dutch National Physics Thesis Prize, and competitive personal grants including ERC Starting and Proof of Concept grants and a Spanish Ramón y Cajal grant. Prof Tielrooij has authored more than 65 peer-reviewed publications, with more than 8,500 citations, and he has given more than 50 invited talks.

Publications

2025

  • Tracking and controlling ultrafast charge and energy flow in graphene-semiconductor heterostructures

    Fu, Shuai; Zhang, Heng; Tielrooij, Klaas-Jan; Bonn, Mischa; Wang, HaiI The Innovation; 6 (3): 100764. 2025. 10.1016/j.xinn.2024.100764. IF: 25.700

2024

  • Long lived photogenerated charge carriers in few-layer transition metal dichalcogenides obtained from liquid phase exfoliation

    F Morabito; Kevin Synnatschke; Jake D. Mehew; Sebin Varghese; Charles J. Sayers; Giulia Folpini; Annamaria Petrozza; Giulio Cerullo; Klaas‐Jan Tielrooij; Jonathan N. Coleman; Valeria Nicolosi; Christoph Gadermaier Nanoscale Advances; 6 (4): 1074 - 1083. 2024. 10.1039/d3na00862b. IF: 4.600

  • Microscopic understanding of the in-plane thermal transport properties of 2⁢H transition metal dichalcogenides

    Roberta Farris; Olle Hellman; Zeila Zanolli; David Saleta Reig; Sebin Varghese; Pablo Ordejón; Klaas‐Jan Tielrooij; Matthieu J. Verstraete Physical Review. B./Physical Review. b; 109 (12) 2024. 10.1103/physrevb.109.125422.

  • Spatiotemporal Microscopy: Shining Light on Transport Phenomena

    Vazquez, Guillermo D Brinatti; Morganti, Giulia Lo Gerfo; Block, Alexander; van Hulst, Niek F; Liebel, Matz; Tielrooij, Klaas-Jan Advanced Electronic Materials; 2024. 10.1002/aelm.202300584. IF: 5.300

  • Spatiotemporal Microscopy: Shining Light on Transport Phenomena (Adv. Electron. Mater. 2/2024)

    Vazquez, GDB; Morganti, GL; Block, A; van Hulst, NF; Liebel, M; Tielrooij, KJ Advanced Electronic Materials; 10 (2) 2024. 10.1002/aelm.202470009. IF: 5.300

  • Terahertz-to-Visible Light Conversion in Graphene Metamaterials Controlled by Electrostatic Gate

    Igor Ilyakov; A. N. Ponomaryov; David Saleta Reig; Connor Murphy; Jake D. Mehew; Thales V. A. G. de Oliveira; Gulloo Lal Prajapati; Ammar Arshad; Jan‐Christoph Deinert; Monica F. Craciun; Saverio Russo; Sergey Kovalev; Klaas‐Jan Tielrooij Journal Of The Institute Of Electronics, Information And Communication Engineers; : 1 - 2. 2024. 10.1109/irmmw-thz60956.2024.10697761.

  • Ultrafast Charge and Exciton Diffusion in Monolayer Films of 9-Armchair Graphene Nanoribbons

    Varghese, Sebin; Mehew, Jake Dudley; Wang, Hai I; Wuttke, Michael; Zhou, Yazhou; Muellen, Klaus; Narita, Akimitsu; Cummings, Aron W; Tielrooij, Klaas-Jan Advanced Materials; 2024. 10.1002/adma.202407796. IF: 27.400

  • Ultrafast Umklapp-assisted electron-phonon cooling in magic-angle twisted bilayer graphene

    Mehew, Jake Dudley; Merino, Rafael Luque; Ishizuka, Hiroaki; Block, Alexander; Merida, Jaime Diez; Carlon, Andres Diez; Watanabe, Kenji; Taniguchi, Takashi; Levitov, Leonid S; Efetov, Dmitri K; Tielrooij, Klaas-Jan Science Advances; 10 (6): eadj1361. 2024. 10.1126/sciadv.adj1361. IF: 11.700

2023

  • A pre-time-zero spatiotemporal microscopy technique for the ultrasensitive determination of the thermal diffusivity of thin films

    Varghese, S; Mehew, JD; Block, A; Reig, DS; Wozniak, P; Farris, R; Zanolli, Z; Ordejon, P; Verstraete, MJ; van Hulst, NF; Tielrooij, KJ Review Of Scientific Instruments; 94 (3): 34903. 2023. 10.1063/5.0102855. IF: 1.600

  • Efficient terahertz harmonic generation in topological metamaterials

    Kovalev, S; Tielrooij, K; Ilyakov, I; Deinert, JC; de Oliveira, T; Ponomaryov, O; Principi, A; Reig, D; Block, A; Varghese, S; Schreyeck, S; Brunner, K; Karczewski, G; Carbonell, C; Valenzuela, S; Molenkamp, L; Kiessling, T; Astakhov, GV International Conference On Infrared, Millimeter, And Terahertz Waves, Irmmw-Thz; 2023. 10.1109/IRMMW-THz57677.2023.10298895.

  • Electron cooling in graphene enhanced by plasmon-hydron resonance

    Yu, XQ; Principi, A; Tielrooij, KJ; Bonn, M; Kavokine, N Nature Nanotechnology; 18 (8): 898 - +. 2023. 10.1038/s41565-023-01421-3. IF: 38.300

  • Enhanced Thermal Conductivity of Free-Standing Double-Walled Carbon Nanotube Networks

    Mehew, JD; Timmermans, MY; Reig, DS; Sergeant, S; Sledzinska, M; Chávez-Angel, E; Gallagher, E; Torres, CMS; Huyghebaert, C; Tielrooij, KJ Acs Applied Materials & Interfaces; 15 (44): 51876 - 51884. 2023. 10.1021/acsami.3c09210. IF: 9.500

  • Observation of Negative Effective Thermal Diffusion in Gold Films

    Block, A; Yu, RW; Un, IW; Varghese, S; Liebel, M; van Hulst, NF; Fan, SH; Tielrooij, KJ; Sivan, Y Acs Photonics; 10 (4): 1150 - 1158. 2023. 10.1021/acsphotonics.2c01916. IF: 7.000

  • Reversible Electrical Control of Interfacial Charge Flow across van der Waals Interfaces

    Fu, S; Jia, XY; Hassan, AS; Zhang, H; Zheng, WH; Gao, L; Di Virgilio, L; Krasel, S; Beljonne, D; Tielrooij, KJ; Bonn, M; Wang, HI Nano Letters; 23 (5): 1850 - 1857. 2023. 10.1021/acs.nanolett.2c04795. IF: 10.800

  • Terahertz nonlinear photonics based on the ultrafast thermodynamics of quantum materials

    Tielrooij, KJ; Principi, A; Reig, DS; Varghese, S; Astakhov, G; Kovalev, S International Conference On Infrared, Millimeter, And Terahertz Waves, Irmmw-Thz; 2023. 10.1109/IRMMW-THz57677.2023.10298868.

  • Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials

    Ilyakov, I; Ponomaryov, A; Reig, DS; Murphy, C; Mehew, JD; de Oliveira, TVAG; Prajapati, GL; Arshad, A; Deinert, JC; Craciun, MF; Russo, S; Kovalev, S; Tielrooij, KJ Nano Letters; 23 (9): 3872 - 3878. 2023. 10.1021/acs.nanolett.3c00507. IF: 10.800

2022

  • Electrically Tunable Nonequilibrium Optical Response of Graphene

    Pogna E.A.A., Tomadin A., Balci O., Soavi G., Paradisanos I., Guizzardi M., Pedrinazzi P., Mignuzzi S., Tielrooij K.-J., Polini M., Ferrari A.C., Cerullo G. ACS Nano; 16 (3): 3613 - 3624. 2022. 10.1021/acsnano.1c04937. IF: 15.881

  • Milliwatt terahertz harmonic generation from topological insulator metamaterials

    Tielrooij, Klaas-Jan; Principi, Alessandro; Reig, David Saleta; Block, Alexander; Varghese, Sebin; Schreyeck, Steffen; Brunner, Karl; Karczewski, Grzegorz; Ilyakov, Igor; Ponomaryov, Oleksiy; de Oliveira, Thales V A G; Chen, Min; Deinert, Jan-Christoph; Carbonell, Carmen Gomez; Valenzuela, Sergio O; Molenkamp, Laurens W; Kiessling, Tobias; Astakhov, Georgy, V; Kovalev, Sergey Light-Science & Applications; 11 (1): 315. 2022. 10.1038/s41377-022-01008-y. IF: 20.257

  • Ultrafast electronic heat dissipation through surface-to-bulk Coulomb coupling in quantum materials

    Principi, Alessandro; Tielrooij, Klaas-Jan Physical Review b; 106 (11): 115422. 2022. 10.1103/physrevb.106.115422. IF: 3.908

  • Ultrafast light-based logic with graphene

    Tielrooij, KJ Nature Materials; 22 (8): 945 - 946. 2022. 10.1038/s41563-022-01367-2. IF: 47.656

  • Unraveling Heat Transport and Dissipation in Suspended MoSe2 from Bulk to Monolayer

    Saleta Reig D., Varghese S., Farris R., Block A., Mehew J.D., Hellman O., Woźniak P., Sledzinska M., El Sachat A., Chávez-Ángel E., Valenzuela S.O., van Hulst N.F., Ordejón P., Zanolli Z., Sotomayor Torres C.M., Verstraete M.J., Tielrooij K.-J. Advanced Materials; 34 (10, 2108352) 2022. 10.1002/adma.202108352. IF: 30.849

2021

  • Decoupling the effects of defects on efficiency and stability through phosphonates in stable halide perovskite solar cells

    Xie H., Wang Z., Chen Z., Pereyra C., Pols M., Gałkowski K., Anaya M., Fu S., Jia X., Tang P., Kubicki D.J., Agarwalla A., Kim H.-S., Prochowicz D., Borrisé X., Bonn M., Bao C., Sun X., Zakeeruddin S.M., Emsley L., Arbiol J., Gao F., Fu F., Wang H.I., Tielrooij K.-J., Stranks S.D., Tao S., Grätzel M., Hagfeldt A., Lira-Cantu M. Joule; 5 (5): 1246 - 1266. 2021. 10.1016/j.joule.2021.04.003. IF: 41.248

  • Electrical tunability of terahertz nonlinearity in graphene

    Kovalev S., Hafez H.A., Tielrooij K.-J., Deinert J.-C., Ilyakov I., Awari N., Alcaraz D., Soundarapandian K., Saleta D., Germanskiy S., Chen M., Bawatna M., Green B., Koppens F.H.L., Mittendorff M., Bonn M., Gensch M., Turchinovich D. Science Advances; 7 (15, eabf9809) 2021. 10.1126/SCIADV.ABF9809. IF: 14.143

  • Fabrication and characterization of large-area suspended MoSe2 crystals down to the monolayer

    Varghese S., Reig D.S., Mehew J.D., Block A., El Sachat A., Chávez-Ángel E., Sledzinska M., Ballesteros B., Sotomayor Torres C.M., Tielrooij K.-J. JPhys Materials; 4 (4, 046001) 2021. 10.1088/2515-7639/ac2060. IF: 0.000

  • Grating-Graphene Metamaterial as a Platform for Terahertz Nonlinear Photonics

    Deinert J.-C., Alcaraz Iranzo D., Pérez R., Jia X., Hafez H.A., Ilyakov I., Awari N., Chen M., Bawatna M., Ponomaryov A.N., Germanskiy S., Bonn M., Koppens F.H.L., Turchinovich D., Gensch M., Kovalev S., Tielrooij K.-J. ACS Nano; 15 (1): 1145 - 1154. 2021. 10.1021/acsnano.0c08106. IF: 15.881

  • Hot carriers in graphene-fundamentals and applications

    Massicotte M., Soavi G., Principi A., Tielrooij K.-J. Nanoscale; 13 (18): 8376 - 8411. 2021. 10.1039/d0nr09166a. IF: 7.790

  • Hot plasmons make graphene shine

    Koppens F.H.L., Tielrooij K.-J. Nature Materials; 20 (6): 721 - 722. 2021. 10.1038/s41563-021-00952-1. IF: 43.841

  • Hot-Carrier Cooling in High-Quality Graphene Is Intrinsically Limited by Optical Phonons

    Pogna E.A.A., Jia X., Principi A., Block A., Banszerus L., Zhang J., Liu X., Sohier T., Forti S., Soundarapandian K., Terrés B., Mehew J.D., Trovatello C., Coletti C., Koppens F.H.L., Bonn M., Wang H.I., Van Hulst N., Verstraete M.J., Peng H., Liu Z., Stampfer C., Cerullo G., Tielrooij K.-J. ACS Nano; 15 (7): 11285 - 11295. 2021. 10.1021/acsnano.0c10864. IF: 15.881

  • Long-lived charge separation following pump-wavelength–dependent ultrafast charge transfer in graphene/WS2 heterostructures

    Fu S., du Fossé I., Jia X., Xu J., Yu X., Zhang H., Zheng W., Krasel S., Chen Z., Wang Z.M., Tielrooij K.-J., Bonn M., Houtepen A.J., Wang H.I. Science Advances; 7 (9, eabd9061) 2021. 10.1126/sciadv.abd9061. IF: 14.143

  • Observation of giant and tunable thermal diffusivity of a Dirac fluid at room temperature

    Block A., Principi A., Hesp N.C.H., Cummings A.W., Liebel M., Watanabe K., Taniguchi T., Roche S., Koppens F.H.L., van Hulst N.F., Tielrooij K.-J. Nature Nanotechnology; 16 (11): 1195 - 1200. 2021. 10.1038/s41565-021-00957-6. IF: 39.213

  • Terahertz signatures of ultrafast Dirac fermion relaxation at the surface of topological insulators

    Kovalev S., Tielrooij K.-J., Deinert J.-C., Ilyakov I., Awari N., Chen M., Ponomaryov A., Bawatna M., de Oliveira T.V.A.G., Eng L.M., Kuznetsov K.A., Safronenkov D.A., Kitaeva G.K., Kuznetsov P.I., Hafez H.A., Turchinovich D., Gensch M. npj Quantum Materials; 6 (1, 84) 2021. 10.1038/s41535-021-00384-9. IF: 7.032

  • Thickness-Dependent Elastic Softening of Few-Layer Free-Standing MoSe2

    Babacic V., Saleta Reig D., Varghese S., Vasileiadis T., Coy E., Tielrooij K.-J., Graczykowski B. Advanced Materials; 33 (23, 2008614) 2021. 10.1002/adma.202008614. IF: 30.849

2020

  • Fast electrical modulation of strong near-field interactions between erbium emitters and graphene

    Cano D., Ferrier A., Soundarapandian K., Reserbat-Plantey A., Scarafagio M., Tallaire A., Seyeux A., Marcus P., Riedmatten H., Goldner P., Koppens F.H.L., Tielrooij K.-J. Nature Communications; 11 (1, 4094) 2020. 10.1038/s41467-020-17899-7. IF: 12.121

  • Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene

    Castilla S., Vangelidis I., Pusapati V.-V., Goldstein J., Autore M., Slipchenko T., Rajendran K., Kim S., Watanabe K., Taniguchi T., Martín-Moreno L., Englund D., Tielrooij K.-J., Hillenbrand R., Lidorikis E., Koppens F.H.L. Nature Communications; 11 (1, 4872) 2020. 10.1038/s41467-020-18544-z. IF: 12.121

  • Terahertz Nonlinear Optics of Graphene: From Saturable Absorption to High-Harmonics Generation

    Hafez H.A., Kovalev S., Tielrooij K.-J., Bonn M., Gensch M., Turchinovich D. Advanced Optical Materials; 8 (3, 1900771) 2020. 10.1002/adom.201900771. IF: 8.286

2019

  • Control of Terahertz Nonlinearity in Graphene by Gating

    Hafez H.A., Tielrooij K.-J., Bonn M., Turchinovich D. International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; 2019-September (8874288) 2019. 10.1109/IRMMW-THz.2019.8874288.

  • Fast and Sensitive Terahertz Detection Using an Antenna-Integrated Graphene pn Junction

    Castilla S., Terrés B., Autore M., Viti L., Li J., Nikitin A.Y., Vangelidis I., Watanabe K., Taniguchi T., Lidorikis E., Vitiello M.S., Hillenbrand R., Tielrooij K.-J., Koppens F.H.L. Nano Letters; 19 (5): 2765 - 2773. 2019. 10.1021/acs.nanolett.8b04171. IF: 12.279

  • Graphene: The ultimate nonlinear material at terahertz frequencies

    Hafez H.A., Kovalev S., Deinert J.-C., Jan-Tielrooij K., Bonn M., Gensch M., Turchinovich D. Optics InfoBase Conference Papers; Part F154-TSA 2019 2019. .

  • Kinetic Ionic Permeation and Interfacial Doping of Supported Graphene

    Jia X., Hu M., Soundarapandian K., Yu X., Liu Z., Chen Z., Narita A., Müllen K., Koppens F.H.L., Jiang J., Tielrooij K.-J., Bonn M., Wang H.I. Nano Letters; 19 (12): 9029 - 9036. 2019. 10.1021/acs.nanolett.9b04053. IF: 12.279

  • Surface-Specific Spectroscopy of Water at a Potentiostatically Controlled Supported Graphene Monolayer

    Dreier L.B., Liu Z., Narita A., Van Zadel M.-J., Müllen K., Tielrooij K.-J., Backus E.H.G., Bonn M. Journal of Physical Chemistry C; 123 (39): 24031 - 24038. 2019. 10.1021/acs.jpcc.9b05844. IF: 4.309

  • Ultrathin Eu- and Er-Doped Y2O3 Films with Optimized Optical Properties for Quantum Technologies

    Scarafagio M., Tallaire A., Tielrooij K.-J., Cano D., Grishin A., Chavanne M.-H., Koppens F.H.L., Ringuedé A., Cassir M., Serrano D., Goldner P., Ferrier A. Journal of Physical Chemistry C; 123 (21): 13354 - 13364. 2019. 10.1021/acs.jpcc.9b02597. IF: 4.309

More publications by Dr Klaas-Jan Tielrooij