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RIKEN SPring-8 Center SR Imaging Instrumentation Team

Team Leader: Yoshiki Kohmura (D.Sc.)

Research Summary

Yoshiki  Kohmura

SR imaging instrumentation team implements the common equipments for the use at undulator beamline BL29XUL at SPring8, so that a cutting edge of x-ray imaging techniques are developed further in the medical, biological and material fields.
Our group developed the X-ray lightsheet microscope for the first time and is trying to realize the 3D imaging of neural network inside the whole human brain. We are developing the crystalline X-ray optical devices, such as to find application of the novel X-ray translation effect inside deformed crystal which we discovered recently.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Science using Quantum Beam
  • Applied Physics
  • Nano/Micro Science


  • X-ray Optics
  • Utilization of X-ray Structured Light
  • X-ray Wave-front engineering
  • X-ray lightsheet microscope
  • Three dimensional imaging of neural network inside whole brain

Selected Publications

  • 1. Kohmura, Y., et al.:
    "The new X‑ray/visible microscopy MAXWELL technique for fast three‑dimensional nanoimaging with isotropic resolution":
    Scientific Reports, 12, 9668 (2022)
  • 2. Hoshino, T., Kohmura, Y. et al.:
    "Dynamical heterogeneity near glass-transition temperature under shear conditions":
    Phys. Rev. Lett., 124, 118004 (2020)
  • 3. Takei, D. Kohmura, Y. et al.:
    "Unidirectional X-ray Output from a Crystal Waveguide affected by Berry's Phase":
    Optics Express, 24(21), 24544-24550 (2016)
  • 4. Suzuki, A., Kohmura, Y. et al.,:
    "High-Resolution Multislice X-Ray Ptychography of Extended Thick Objects":
    Phys. Rev. Lett., 112, 053903 (2014).
  • 5. Kohmura, Y., et al.:
    "Controlling the Propagation of X-Ray Waves inside a Heteroepitaxial Crystal Containing Quantum Dots Using Berry's Phase.":
    Phys. Rev. Lett. 110, 057402-1-057402-4 (2013)
  • 6. Kohmura, Y., et al.:
    "Berry-Phase Translation of X Rays by a Deformed Crystal.":
    Phys. Rev. Lett. 104, 244801-1-244801-4 (2010)
  • 7. Kohmura, Y., et al.:
    "Determination of complex transmissivity using x-ray in-line holography and two-beam interferometry.":
    Journal of Applied Physics 102, 023101-1-023101-5 (2007)
  • 8. Miao, J., Kohmura, Y., et al.:
    "Three-Dimensional GaN-Ga2O3 Core Shell Structure Revealed by X-ray Diffraction Microscopy.":
    Phys. Rev. Lett. 97, 215503-1-215503-4 (2006)

Recent Research Results

Lab Members

Principal investigator

Yoshiki Kohmura
Team Leader

Core members

Kenichi Kato
Senior Research Scientist
Hiroyuki Ohsumi
Senior Research Scientist


Position Deadline
Seeking a Research Scientist position (C21-0204) Open until filled

Contact Information

1-1-1 Kouto, Sayo-cho
Sayo-gun, Hyogo
679-5148 Japan
Email: kohmura [at] spring8.or.jp