Coherent X-Ray Optics Laboratory
Chief Scientist
Tetsuya ISHIKAWA (D.Eng.)
The laboratory, located in the Harima institute, has two major missions. One is design and construction of the SPring-8 synchrotron radiation beamlines, in particular, their optical instrumentation. Another is the instrumentation for the advanced utilization of the synchrotron radiation as well as X-ray free electron lasers. This includes the developments of (i) optics cooling system with higher efficiency, (ii) fast x-ray photon detection system with sub-nanosecond resolution, (iii) meV-resolution x-ray energy analysis system, (iv) nano-radian range angle-resolved diffraction measurement system, (v) x-ray interferometry and its application to phase-sensitive imaging as well as photon-gravity interaction, and (vi) high-resolution x-ray imaging using diffraction (topography), interference (holography) and coherent scattering (diffraction microscopy).
- High precision x-ray optics and optical instruments
- X-ray interferometer and interferometry
- Pulse synchronization between laser and synchrotron radiation
- December 18, 2009
- First ever determination of X-ray non-linear susceptibility using diamond
- December 24, 2008
- An 'X-ray microscope' developed for the three dimensional observation of the inside of the cell succeeded in taking the first X-ray CT images of human chromosomes in the world
- March 14, 2008
- Real-time observation of ultra high speed alteration process of optical disc material by SPring-8 for the first time in the world, suggesting new material design aiming for a speeded-up device from phase transfer optical recording materials
- June 14, 2007
- Coherent X-Ray Optics Laboratory of SPring-8 Center detected a novel non-linear optic phenomenon in the X-ray region with high sensitivity, emerging by at a 10-11 probability, for the first time in the world.
- December 02, 2011
- Sharpening the focus of microscopes
Based on non-linear optical effects, imaging with light has reached atomic precision in the most precise microscope ever built
- March 12, 2010
- X-rays in a new light
The SPring-8 synchrotron opens the door to study the nonlinear interaction of high-intensity x-rays with matter
- July 19,2008
- Watching DVDs in real-time
High-speed x-ray diffraction provides a better view of rewriteable digital recording media
- R. Bachelard, P. Mercere, M. Idir, M. E. Couprie, M. Labat, O. Chubar, G. Lambert, P. Zeitoun, H. Kimura, H. Ohashi, A. Higashiya, M. Yabashi, M. nagasono, T. Hara and T. Ishikawa,:
"Wavefront analysis of nonlinear self-amplified spontaneous-emission free-electron laser harmonics in the single-shot regime"
Phys. Rev. Lett., 106 (2011) 234801. - K. Tamasaku, K. Sawada, E. Nishibori and T. Ishikawa,:
"Visualizing the local optical response to extreme-ultraviolet radaiation with a resolution of λ/380"
Nature Physics, 7 (2011) 705-708. - Y. Takahashi, A. Suzuki, N. Zettsu, Y. Kohmura, K. Yamauchi and T. Ishikawa,:
"Multiscale element mapping of buried structures by ptychographic x-ray diffraction microscopy using anomalous scattering"
Appl. Phys. Lett., 99 (2011) 131905 - M. Nagasono, J. R. Harries, H. Iwayanma, T. Togashi, K. Tono, M. Yabashi, Y. Senba, H. Ohashi, T. Ishikawa and E. Shigemasa,:
"Observation of free-electron-laser-induced collective spontaneous emission (superfluorescence)"
Phys. Rev. Lett. 107 (2011) 193603 - A. Hishikawa, M. Fushitani, Y. Hikosaka, A. Matsuda, C.-N. Liu, T. Morishita. E. Shigemasa, M. Nagasono, K. Tono, T. Togashi, H. Ohashi, H. Kimura, Y. Senba, M. Yabashi and T. Ishikawa,:
"Enhanced nonlinear double excitation of He in intense extreme ultraviolet laser fields"
Phys. Rev. Lett., 107 (2011) 243003-1-5. - Y. Nakatsu, A. Sekiyama, S. Imada, Y. Okamoto, S. Niitaka, H. Takagi, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa and S. Suga,:
"Hard x-ray photoelectron spectroscopy of the metal-insulator transition in LiRh2O4"
Phys. Rev. B, 83 (2011) 115120-1-5. - K. Tono, T. Kudo, M. Yabashi, T. Tachibana, Y. P. Feng, D. Fritz, J. Hastings and T. Ishikawa,:
"Single-shot beam-position monitor for x-ray free electron laser"
Rev. Sci. Instrum. 82 (2011) 023108-1-6. - T. Ohtsuki, A. Chainani. R. Eguchi, M. Matsunami, Y. Takata, M. Taguchi, Y. Nishino, K. Tamasaku, M. Yabashi, T. Ishikawa, M. Oura, Y. Senba, H. Ohashi and S. Shin,:
"Role of Ti 3d carriers in mediating the ferromagnetism of Co:TiO2 anatase thin films"
Phys. Rev. Lett. 106 (2011) 047602-1-4. - T. Togashi, EJ. Takahashi, K. Midorikawa, M. Aoyama, K. Yamakawa, T. Sato, A. Iwasaki, S. Owada, T. Okino, K. Yamanouchi, F. Kannari, A. Yagishita, H. Nakano, M. E. Couprie, K. Fukami, T. Hatsui, T. Hara, T. Kameshima, H. Kitamura, T. Shintake, K. Tamasaku, H. Tanaka, T. Tanaka, K. Togawa, H. Tomizawa, T. Watanabe, M. Yabashi and T. Ishikawa,:
"Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphire laser"
Opt. Exp. 19 (2011) 317-324. - N. Miyauchi, J. Adaqchi, A. Yagishita, T. Sako, F. Koike, T. Sato, A. Iwasaki, T. Okino, K. Yamanouchi, K. Midorikawa, K. Yamakawa, F. Kannari, H. Nakano, A. Nagasono, K. Tono, M. Yabashi, T. Ishikaawa, T. Togashi, H. Ohashi, H. Kimura and Y. Senba,:
"Three-photon double ionization of Ar studied by photoelectron spectroscopy using an extreme ultraviolet free-electron laser: manifestation of resonance states of an intermediate Ar+ ion"
J. Pys. B, 44 (2011) 071001-1-7.
Principal Investigator
- Tetsuya ISHIKAWA
- Chief Scientist
Staff Scientist
- Yoshihito TANAKA
- Kazuaki TOGAWA
- Senior Research Scientist
- Hisashi NAITO
- Senior Research Scientist
- Yuji OTAKE
- Senior Research Scientist
- Hitoshi YAMAOKA
- Senior Research Scientist
- Yoshikazu TANAKA
- Senior Research Scientist
- Yoshiki KOHMURA
- Senior Research Scientist
- Toru HARA
- Senior Research Scientist
- Kenji TAMASAKU
- Senior Research Scientist
- Takashi TANAKA
- Senior Research Scientist
- Ashish Atma CHAINANI
- Senior Research Scientist
- Takahiro INAGAKI
- Research Scientist
- Hirokazu MAESAKA
- Research Scientist
Student Trainee
- Marcus John GALLAGHER JONES
- International Program Associate