Centers & Labs

RIKEN SPring-8 Center

Laser-Driven Electron-Acceleration Technology Group

Group Director: Takunori Taira (Ph.D.)
Takunori  Taira(Ph.D.)

Laser-Driven Electron-Acceleration Technology Group will develop the compact, stable laser driven electron acceleration system, and its key technology towards the new generation of XFEL. Laser Acceleration Development Team proceed the R&D of GeV-class multi-staged Laser Wake-Field Acceleration (LWFA) with plasma photonic devices. Basic Laser Development Team will develop the compact power lasers based on these Tiny Integrated LAsers (TILA) to provide the extreme giant-power, and open their fruitful future of “Giant Micro-photonics” for the advanced electron accelerators.

Main Research Field

Interdisciplinary science and engineering

Related Research Fields


Quantum beam science / Applied physics / Physics


  • Laser Particle Acceleration
  • Laser Wakefield
  • Tiny Integrated Lasers (TILA)
  • Giant Micro-photonics
  • Giant Micro-photonics

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. *Yahia, V., and Taira, T.:
    "High brightness energetic pulses delivered by compact microchip-MOPA system,"
    Opt. Express, vol. 26, no. 7, pp. 8609-8618 (2018)
  2. *Zheng, L., Kausas, A., Taira, T.:
    "Drastic thermal effects reduction through distributed face cooling in a high power giant-pulse tiny laser,"
    Opt. Mater. Express, vol. 7, no. 9, pp. 3214-3221 (2017)
  3. *Taira, T.
    "Domain-controlled laser ceramics toward giant micro-photonics [Invited], "
    Opt. Mater. Express, vol. 1, no. 5, pp. 1040-1050 (2011)
  4. *Sakai, H., Kan, H., and Taira, T.:
    ">1 MW peak power single-mode high-brightness passively Q-switched Nd3+:YAG microchip laser"
    Opt. Express, vol. 16, no. 24, pp. 19891-19899 (2008)
  5. *Taira, T.
    "RE3+-ion-doped YAG ceramic lasers,"
    IEEE J. Sel. Top. Quantum Electron., vol. 13, no. 3, May/June, pp. 798-809 (2007.5-6).
  6. *Taira, T.
    "RE3+-ion-doped YAG ceramic lasers,"
    IEEE J. Sel. Top. Quantum Electron., vol. 13, no. 3, May/June, pp. 798-809 (2007.5-6).
  7. *Hosokai, T., Zhidkov, A., Yamazaki, A., Mizuta, Y., Uesaka, M., and Kodama, R.:
    "Electron energy boosting in laser-wake-field acceleration with external magnetic field B〜 1T and laser prepulses"
    Applied Physics Letters, 96(12), 121501-1_3 (2010)
  8. *Hosokai, T., Kinoshita, K., Zhidkov, A., Maekawa, A., Yamazaki, and A., Uesaka, M.:
    "Effect of external static magnetic field on the emittance and total charge of electron beams generated by laser wake field acceleration."
    Physical Review Letters , 97, 075004 (2006)
  9. *Hosokai, T., Kinoshita, K., Yamazaki, A., Zhidkov, A., Ohkubo, T., Maekawa, A., Kando, M., Kotaki,H., and Uesaka, M.:
    "Observation of strong correlation between quasi-mono-energetic electron beam generation by laser wakefield and laser guiding inside pre-plasma cavity"
    Physical Review E , 73, 036047 (2006)
  10. *Hosokai, T., Kando, M., Dewa, H., Kotaki, H., Kondo, S., Horioka, K. and Nakajima, K.:
    "Optical guidance of terrawatt laser pulses by the implosion phase of fast Z-pinch discharge in a gas-filled capillary"
    Optics Letters , 25,10 (2000)