Ultrashort Electron Beam Science RIKEN Hakubi Research Team

RIKEN Hakubi Team Leader

Yuya Morimoto



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Ultrashort Electron Beam Science RIKEN Hakubi Research Team,
RIKEN Center for Advanced Photonics

2-1 Hirosawa, Wako, Saitama 351-0198 Japan


Electron beams are used for examples in electron microscopy and electron-beam lithography, where high spatial resolution is required. By using state-of-the-art laser and electron-beam technologies, we control the temporal structure of an electron beam with ultimate attosecond resolution and apply the controlled electron beams for imaging and controlling ultrafast chemical reactions. We explore the atomic-scale dynamics of electrons in a material which is the initial step of most photochemical reactions.


Chemistry, Physics, Interdisciplinary Science and Engineering, Engineering


Ultrashort electron beam, Electron beam imaging, Nonlinear optics, Attosecond science, Atomic collisions


  1. Attosecond control of electron beams
  2. Ultrafast electron-beam imaging of chemical reactions
  3. Control of collisional processes using coherent electron beams
  4. Development of ultrashort and intense infrared laser pulses and their applications
Research image

Light-wave modulation of an electron beam

Selected Publications

  1. Morimoto, Y., Shinohara, Y., Ishikawa, K.L., and Hommelhoff, P.: “Atomic real-space perspective of light-field-driven currents in graphene”, New J. Phys. 24, 033051 (2022).
  2. Morimoto, Y., Shinohara, Y., Tani, M., Chen, B.H., Ishikawa, K.L., and Baum, P.:“Asymmetric single-cycle control of valence electron motion in polar chemical bonds”, Optica 8, 382 (2021).
  3. Morimoto, Y., Hommelhoff, P., and Madsen, L.B.: “Coherent scattering of an optically-modulated electron beam by atoms”, Phys. Rev. A 103, 043110 (2021).
  4. Morimoto, Y., and Baum, P.: “Single-Cycle Optical Control of Beam Electrons”, Phys. Rev. Lett. 125, 193202 (2020).
  5. Morimoto, Y., and Baum, P.: “Diffraction and microscopy with attosecond electron pulse trains”, Nat. Phys. 14, 252 (2018).



Yuya MorimotoRIKEN Hakubi Team Leader
Yuichi TachibanaPostdoctoral Researcher
Marie OuillePostdoctoral Researcher