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Dr. Michael Krueger's website

Dr. Michael Krueger - Ultrafast Spectroscopy @ Technion

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Ultrafast Quantum Dynamics Group

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  • Home
  • Research
  • Publications
  • News
  • People
  • Open Positions
  • Teaching
  • Contact

Publications

2025

  1. B. Ma and M. Krüger
    Robust strong-field theory model for ultrafast electron transport through metal-insulator-metal tunneling nanojunctions
    Manuscript submitted to Phys. Rev. A, preprint arXiv:2503.14531 (2025)
  2. M. Even Tzur, C. Mor, N. Yaffe, M. Birk, A. Rasputnyi, O. Kneller, I. Nisim, I. Kaminer, M. Krüger, N. Dudovich and O. Cohen
    Measuring and controlling the birth of quantum attosecond pulses
    Manuscript preprint arXiv:2502.09427 (2025)
  3. Z. Chen*, M. Levit*, Y.Kern, B. Roy, A. Goldner and M. Krüger
    Attosecond pulses from a solid driven by a synthesized two-color field at megahertz repetition rate
    ACS Photonics doi:10.1021/acsphotonics.5c00410 (2025)
  4. A. G. Borisov, B. Ma, M. Zapata-Herrera, A. Babaze, M. Krüger and J. Aizpurua
    Femtosecond optical-field-driven currents in few-nanometer-size gaps with hot electron injection into metallic leads
    ACS Photonics 12, 2137 (2025)
  5. B. K. Das, C. Granados, M. Krüger and M. F. Ciappina
    Free-space propagation of double-ring perfect optical vortex beams
    J. Opt. 27, 025601 (2025)

2024

  1. J. Rivera-Dean, H. B. Crispin, P. Stammer, Th. Lamprou, E. Pisanty, M. Krüger, P. Tzallas, M. Lewenstein and M. F. Ciappina
    Squeezed states of light after high-order harmonic generation in excited atomic systems
    Phys. Rev. A 110, 063118 (2024)
  2. B. K. Das, C. Granados, M. Krüger and M. F. Ciappina
    High-order harmonic generation driven by perfect optical vortex beams: Exploring the orbital angular momentum upscaling law
    Phys. Rev. Research 6, 043244 (2024)
  3. B. Ma and M. Krüger
    Strong-field theory of attosecond tunneling microscopy
    Phys. Rev. Lett. 133, 236901 (2024)
  4. O. Kneller*, C. Mor*, N. D. Klimkin*, N. Yaffe, M. Krüger, D. Azoury, A. J. Uzan-Narovlansky, Y. Federman, D. Rajak, B. D. Bruner, O. Smirnova, S. Patchkovskii, Y. Mairesse, M. Y. Ivanov and N. Dudovich
    Attosecond transient interferometry
    Nature Photonics 20, 1960 (2024)
  5. A. Rasputnyi, Z. Chen, M. Birk, O. Cohen, I. Kaminer, M. Krüger, D. Seletskiy, M. Chekhova and F. Tani
    High-harmonic generation by a bright squeezed vacuum
    Nature Physics 20, 1960 (2024)
  6. B. K. Das, C. Granados, M. Krüger and M. F. Ciappina
    Interference of high-order perfect optical vortex beams
    Opt. Commun. 570, 130918 (2024)
  7. M. Even Tzur, M. Birk, A. Gorlach, I. Kaminer, M. Krüger and O. Cohen
    Generation of squeezed high-order harmonics
    Phys. Rev. Research 6, 033079 (2024)
  8. M. Krüger and N. Dudovich
    Attosecond interferometry
    Book chapter, in “Ultrafast Electronic and Structural Dynamics”, edited by K. Ueda, Springer Nature, Singapore (2024)
  9. M. Eldar, Z. Chen, Y. Pan and M. Krüger
    Self-trapping of slow electrons in the energy domain
    Phys. Rev. Lett. 132, 035001 (2024) · Editors’ suggestion

2023

  1. A. Sanchez*, V. A. Tulsky*, K. Amini, B. D. Bruner, G. Alon, M. Krüger, X. Liu, T. Steinle, D. Bauer, N. Dudovich and J. Biegert
    Tailoring quantum trajectories for strong-field imaging
    Optica 10, 1729 (2023)
  2. M. Krüger and P. Hommelhoff
    Next-generation electron sources
    Book chapter in “Structural Dynamics with X-ray and Electron Scattering”, edited by K. Amini, M. J. J. Vrakking and A. Rouzee, Royal Society of Chemistry, London (2023)
  3. M. Yannai, Y. Adiv, R. Dahan, K. Wang, A. Gorlach, N. Rivera, T. Fishman, M. Krüger and I. Kaminer
    Lossless monochromator in an ultrafast electron microscope using near-field THz radiation
    Phys. Rev. Lett. 131, 145002 (2023) · Editors’ suggestion
  4. A. Gorlach*, M. Even Tzur*, M. Birk, M. Krüger, N. Rivera, I. Kaminer and O. Cohen
    High harmonic generation driven by quantum light
    Nature Physics 19, 1689-1696 (2023) · Featured in News & Views article by D. H. Koh and P. B. Corkum in Nature Physics
  5. Z. Chen, B. Zhang, Y. Pan and M. Krüger
    Quantum wavefunction reconstruction by free-electron spectral shearing interferometry
    Science Advances 9, adg8516 (2023)
  6. M. Even Tzur*, M. Birk*, A. Gorlach, M. Krüger, I. Kaminer and O. Cohen
    Photon-statistics force in ultrafast electron dynamics
    Nature Photonics 17, 501-509 (2023) · Featured in News & Views article by P. Tzallas in Nature Photonics

2022

  1. M. Eldar, S. Abo-Toame and M. Krüger
    Sub-optical-cycle electron pulse trains from metal nanotips
    J. Phys. B: At. Mol. Opt. Phys. 55, 074001 (2022) · Special issue Emerging Leaders 2021
  2. O. Kneller, D. Azoury, Y. Federman, M. Krüger, A.J. Uzan, G. Orenstein, B.D. Bruner, O. Smirnova, S. Patchkovskii, M. Ivanov and N. Dudovich
    A look under the tunnelling barrier via attosecond-gated interferometry
    Nature Photonics 16, 304 (2022)

2021

  1. D. Azoury*, M. Krüger*, B.D. Bruner, O. Smirnova and N. Dudovich
    Direct measurement of Coulomb-laser coupling
    Scientific Reports 11, 495 (2021)

2020

  1. A.J. Uzan, G. Orenstein, Á. Jiménez-Galán, C. McDonald, R.E.F. Silva, B.D. Bruner, N.D. Klimkin, V. Blanchet, T. Arusi-Parpar, M. Krüger, A.N. Rubtsov, O. Smirnova, M.Y. Ivanov, B. Yan, T. Brabec and N. Dudovich
    Attosecond spectral singularities in solid-state high-harmonic generation
    Nature Photonics 14, 138 (2020)

2019

  1. G. Orenstein, A.J. Uzan, S. Gadasi, M. Krüger, R. Cireasa, B.D. Bruner and N. Dudovich
    Shaping electron-hole trajectories for solid-state high harmonic generation control
    Optics Express 27, 37835 (2019)
  2. M. Krüger*, D. Azoury*, B.D. Bruner and N. Dudovich
    The role of electron trajectories in XUV-initiated high harmonic generation
    Applied Sciences 9, 378 (2019)
  3. D. Azoury*, O. Kneller*, M. Krüger, B.D. Bruner, O. Cohen, Y. Mairesse and N. Dudovich
    Interferometric attosecond lock-in measurement of extreme ultraviolet circular dichroism
    Nature Photonics 13, 198 (2019) · Featured in article in Physics Today by Johanna J. Miller
  4. D. Azoury, O. Kneller, S. Rozen, B. D. Bruner, A. Clergerie, B. Fabre, B. Pons, Y. Mairesse, N. Dudovich and M. Krüger
    Electronic wavefunctions probed by all-optical attosecond interferometry
    Nature Photonics 13, 54 (2019)

2018

  1. M. Krüger, Ch. Lemell, G. Wachter, J. Burgdörfer and P. Hommelhoff
    Attosecond physics phenomena at nanometric tips
    J. Phys. B: At. Mol. Opt. Phys. 51, 172001 (2018) · Review article
  2. G. Porat, G. Alon, S. Rozen, O. Pedatzur, M. Krüger, A. Natan, M. J. J. Vrakking, B. D. Bruner and N. Dudovich
    Attosecond time-resolved photoelectron holography
    Nature Communications 9, 2805 (2018)
  3. B. D. Bruner, M. Krüger, O. Pedatzur, G. Orenstein, D. Azoury and N. Dudovich
    Robust enhancement of high harmonic generation via attosecond control of ionization
    Optics Express 26, 9310 (2018) · Editor’s pick

2017

  1. D. Azoury, M. Krüger, G. Orenstein, H. R. Larsson, S. Bauch, B. D. Bruner and N. Dudovich
    Self-probing spectroscopy of XUV photo-ionization dynamics in atoms subjected to a strong-field environment
    Nature Communications 8, 1453 (2017)
  2. D. Hoff, M. Krüger, L. Maisenbacher, G. G. Paulus, P. Hommelhoff and A. M. Sayler
    Using the focal phase to control attosecond processes
    J. Opt. 19, 124007 (2017)
  3. D. Hoff, M. Krüger, L. Maisenbacher, A. M. Sayler, G. G. Paulus and P. Hommelhoff
    Tracing the phase of focused broadband laser pulses
    Nature Physics 13, 947 (2017) · Featured in News & Views article by N. Horiuchi in Nature Photonics
  4. M. F. Ciappina, J. A. Pérez-Hernández, A. S. Landsman, W. A. Okell, S. Zherebtsov, B. Förg, J. Schötz, L. Seiffert, T. Fennel, T. Shaaran, T. Zimmermann, A. Chacón, R. Guichard, A. Zaïr, J. W. G. Tisch, J. P. Marangos, T. Witting, A. Braun, S. A. Maier, L. Roso, M. Krüger, P. Hommelhoff, M. F. Kling, F. Krausz and M. Lewenstein
    Attosecond physics at the nanoscale
    Rep. Prog. Phys. 80, 054401 (2017) · Review article
  5. M. Förster, T. Paschen, M. Krüger, C. Lemell, G. Wachter, F. Libisch, T. Madlener, J. Burgdörfer and P. Hommelhoff
    High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme
    J. Mod. Opt. 64, 1054 (2017)

2016

  1. M. Förster, T. Paschen, M. Krüger, C. Lemell, G. Wachter, F. Libisch, T. Madlener, J. Burgdörfer and P. Hommelhoff
    Two-color coherent control of femtosecond above-threshold photoemission from a tungsten nanotip
    Phys. Rev. Lett. 117, 217601 (2016) · Editor’s suggestion, accompanying Physics Viewpoint by C. Kealhofer.
  2. M. Krüger and N. Dudovich
    Nonlinear optics: Resolving the attosecond beat
    Nature Photonics 10, 626 (2016) · News & Views article
  3. B. Förg, J. Schötz, F. Süßmann, M. Förster, M. Krüger, B. Ahn, W. A. Okell, K. Wintersperger, S. Zherebtsov, A. Guggenmos, V. Pervak, A. Kessel, S. A. Trushin, A. M. Azzeer, M. I. Stockman, D. E. Kim, F. Krausz, P. Hommelhoff and M. F. Kling
    Attosecond nano-scale near-field sampling
    Nature Communications 7, 11717 (2016)

2015

  1. D. Ehberger, J. Hammer, M. Eisele, M. Krüger, J. Noe, A. Högele and P. Hommelhoff
    Highly coherent electron beam from a laser-triggered tungsten needle tip
    Phys. Rev. Lett. 114, 227601 (2015)

2014

  1. M. Krüger, S. Thomas, M. Förster and P. Hommelhoff
    Self-probing of metal nanotips by rescattered electrons reveals the nano-optical near-field
    J. Phys. B: At. Mol. Opt. Phys. 47, 124022 (2014)
  2. J. Hoffrogge, J.-P. Stein, M. Krüger, M. Förster, J. Hammer, D. Ehberger, P. Baum and P. Hommelhoff
    Tip-based source of femtosecond electron pulses at 30keV
    J. Appl. Phys. 115, 094506 (2014)
  3. M.F. Ciappina, J.A. Pérez-Hernández, T. Shaaran, M. Lewenstein, M. Krüger and P. Hommelhoff
    High-order harmonic generation driven by metal nanotip photoemission: theory and simulations
    Phys. Rev. A 89, 013409 (2014)

2013

  1. S. Thomas, M. Krüger, M. Förster, M. Schenk and P. Hommelhoff
    Probing of optical near-fields by electron rescattering on the 1nm scale
    Nano Lett. 13, 4790 (2013)
  2. C. Ott, M. Schönwald, P. Raith, A. Kaldun, G. Sansone, M. Krüger, P. Hommelhoff, Y. Patil, Y. Zhang, K. Meyer, M. Laux and T. Pfeifer
    Strong-field spectral interferometry using the carrier-envelope phase
    New J. Phys. 15, 073031 (2013)
  3. M. Krüger, M. Schenk, J. Breuer, M. Förster, J. Hammer, J. Hoffrogge, S. Thomas and P. Hommelhoff
    From Above-Threshold Photoemission to Attosecond Physics at a Nanometric Tungsten Tip
    Book chapter in “Ultrafast Intense Laser Science Vol. IX”, edited by K. Yamanouchi and K. Midorikawa, 2013, pp. 213-224, Springer, Berlin / Heidelberg
  4. S. V. Yalunin, G. Herink, D. R. Solli, M. Krüger, P. Hommelhoff, M. Diehn, A. Munk and C. Ropers
    Field localization and rescattering in tip-based photoemission
    Annalen der Physik (Berlin) 525, L12 (2013)

2012

  1. M. Krüger, M. Schenk, P. Hommelhoff, G. Wachter, C. Lemell and J. Burgdörfer
    Interaction of ultrashort laser pulses with metal nanotips: a model system for strong-field phenomena
    New J. Phys. 14, 085019 (2012)
  2. G. Wachter, C. Lemell, J. Burgdörfer, M. Schenk, M. Krüger and P. Hommelhoff
    Electron rescattering at metal nanotips induced by ultrashort laser pulses
    Phys. Rev. B 86, 035402 (2012)
  3. M. Krüger, M. Schenk, M. Förster and P. Hommelhoff
    Attosecond physics in photoemission from a metal nanotip
    J. Phys. B: At. Mol. Opt. Phys. 45, 074006 (2012) · Review Article

2011

  1. M. Krüger, M. Schenk and P. Hommelhoff
    Attosecond control of electrons emitted from a nanoscale metal tip
    Nature 475, 78 (2011)
  2. M. Eisele, M. Krüger, M. Schenk, A. Ziegler and P. Hommelhoff
    Production of sharp gold tips with high surface quality
    Rev. Sci. Instr. 82, 026101 (2011)

2010

  1. M. Schenk, M. Krüger and Peter Hommelhoff
    Strong-field above-threshold photoemission from sharp metal tips
    Phys. Rev. Lett. 105, 257601 (2010)

2009

  1. A. Szczepkowicz, L. Krzemień, A. Wojciechowski, K. Brzozowski, M. Krüger, M. Zawada, M. Witkowski, J. Zachorowski and W. Gawlik
    Optimal geometry for efficient loading of an optical dipole trap
    Phys. Rev. A 79, 013408 (2009)

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