RIKEN SPring-8 Center SR Imaging Instrumentation Team
Team Leader: Yoshiki Kohmura (D.Sc.)
Research Summary
The SR Imaging Instrumentation Team implements common equipment for use at undulator beamline BL29XUL at SPring-8, so that leading edge X-ray imaging techniques are further developed for the medical, biological, and materials science fields.
The team’s original techniques enable the control of X-rays using structured materials and the manipulation of materials using structured X-rays. (i) The team is studying the X-ray translation effect caused by the deformation of crystal lattices that they recently discovered. (ii) The team has successfully manipulated, trapped, and nano-fabricated materials using structured X-ray beams.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Interdisciplinary Science & Engineering
- Science using Quantum Beam
- Science using Quantum Beam
- Nano/Micro Science
Keywords
- X-ray Optics
- X-ray waveguide
- X-ray Wave-front engineering
- Nano-fabrication
- Novel image contrast formation of X-ray microscope
Selected Publications
- 1.
Hoshino, T., Kohmura, Y., et al.
"Dynamical heterogeneity near glass-transition temperature under shear conditions"
Phys. Rev. Lett. (2020) - 2.
Kohmura, Y., Zhakhovsky, V., Takei, D., Suzuki, et al.:
"Nano-structuring of multi-layer material by single x-ray vortex pulse with femtosecond duration"
Applied Physical Letters, 112, 123103 (2018) - 3.Takei, D., Kohmura, Y., Sawada, K., 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., Furutaku, S., Shimomura, K., Yamauchi, K., Kohmura, Y., Ishikawa, T., and Takahashi, Y.:
"High-Resolution Multislice X-Ray Ptychography of Extended Thick Objects"
Phys. Rev. Lett. 112, 053903 (2014). - 5.
Kohmura, Y., Sawada, K., Fukatsu, S., Ishikawa, T.:
"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., Sawada, K., Ishikawa, T.:
"Berry-Phase Translation of X Rays by a Deformed Crystal."
Phys. Rev. Lett. 104, 244801-1-244801-4 (2010) - 7.
Kohmura, Y., Sawada, K., Taguchi, M., Ishikawa, T., Ohigashi, T., Suzuki, Y.:
"Formation of x-ray vortex dipoles using a single diffraction pattern and direct phase measurement using interferometry."
Applied Physics Letters 94, 101112-1-101112-3 (2009) - 8.
Kohmura, Y., Sakurai, T., Ishikawa, T., Takeuchi, A., Suzuki, Y., Goto, S.:
"Determination of complex transmissivity using x-ray in-line holography and two-beam interferometry."
Journal of Applied Physics 102, 023101-1-023101-5 (2007) - 9.
Miao, J., Chen, C.C., Song, C., Nishino, Y., Kohmura, Y., Ishikawa, T., Ramunno-Johnson, D., Lee, T.K., Risbud, S.H.:
"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
Mar. 17, 2015
Time lapse snapshots of a nova's fading light
May 2, 2013
X-ray surfing
Lab Members
Principal investigator
- Yoshiki Kohmura
- Team Leader
Core members
- Kenichi Kato
- Senior Research Scientist
- Hiroyuki Ohsumi
- Senior Research Scientist
- Taiki Hoshino
- Senior Research Scientist
Careers
| Position | Deadline |
|---|---|
| Seeking a Research Scientist or Postdoctoral Researcher 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